Spermatophore dimorphism in the chokka squid Loligo reynaudii associated with alternative mating tactics
- Sato, Noriyosi, Iwata, Yoko, Shaw, Paul W, Sauer, Warwick H H
- Authors: Sato, Noriyosi , Iwata, Yoko , Shaw, Paul W , Sauer, Warwick H H
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127070 , vital:35952 , https://doi.10.1093/mollus/eyy002
- Description: Chokka squid (Loligo reynaudii) have characteristic alternative mating tactics: ‘consort’ males temporarily pair with and guard a female and transfer spermatophores onto her oviduct opening inside the mantle cavity, whereas ‘sneaker’ males rush towards a mating pair and transfer spermatophores onto the female’s buccal membrane near her sperm storage organ. Differences in mating behaviours and their related sperm-storage sites clearly constrain the fertilization process and can drive dimorphism between consort and sneaker males. The presence and character of male dimorphism has not yet been fully examined in this species, but consort males are commonly much larger than sneaker males. We observed clear dimorphism in spermatangia (the sperm mass ejaculated from the spermatophore), consistently associated with the two alternative sperm storage sites on the female’s body. Observations of spermatophores stored in the Needham’s sac of mature males confirmed that small males produce ‘sneaker-type’ spermatangia whereas larger males produce ‘consort-type’ spermatangia, and no individuals possessed both types. Therefore, by association, the mating tactic adopted (including the sperm deposition site used) by individual males can be determined from observation of their spermatangial type, without requiring direct behavioural observation of mating. This ability to infer information about mating tactic will improve our understanding of the reproductive system and mating dynamics in this species.
- Full Text:
- Date Issued: 2018
- Authors: Sato, Noriyosi , Iwata, Yoko , Shaw, Paul W , Sauer, Warwick H H
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127070 , vital:35952 , https://doi.10.1093/mollus/eyy002
- Description: Chokka squid (Loligo reynaudii) have characteristic alternative mating tactics: ‘consort’ males temporarily pair with and guard a female and transfer spermatophores onto her oviduct opening inside the mantle cavity, whereas ‘sneaker’ males rush towards a mating pair and transfer spermatophores onto the female’s buccal membrane near her sperm storage organ. Differences in mating behaviours and their related sperm-storage sites clearly constrain the fertilization process and can drive dimorphism between consort and sneaker males. The presence and character of male dimorphism has not yet been fully examined in this species, but consort males are commonly much larger than sneaker males. We observed clear dimorphism in spermatangia (the sperm mass ejaculated from the spermatophore), consistently associated with the two alternative sperm storage sites on the female’s body. Observations of spermatophores stored in the Needham’s sac of mature males confirmed that small males produce ‘sneaker-type’ spermatangia whereas larger males produce ‘consort-type’ spermatangia, and no individuals possessed both types. Therefore, by association, the mating tactic adopted (including the sperm deposition site used) by individual males can be determined from observation of their spermatangial type, without requiring direct behavioural observation of mating. This ability to infer information about mating tactic will improve our understanding of the reproductive system and mating dynamics in this species.
- Full Text:
- Date Issued: 2018
Staff perceptions of workplace bullying in a South African higher education institution
- Authors: Adesemowo, Bosede Olaitan
- Date: 2018
- Subjects: Bullying in the workplace , Harassment Work environment
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/23404 , vital:30539
- Description: During the past decade bullying has received growing attention in organizational research. Workplace bullying is a complex phenomenon with a variety of situational, dispositional and systemic influences and it has been defined as “status-blind interpersonal hostility that is deliberate, repeated and sufficiently severe as to harm the targeted person's health or economic status” (Namie, 2003:3). A literature overview revealed the destructive consequences of bullying, such as trauma, suicide, depression, anxiety, stress, lowered self-esteem, anger and a lessening of productivity for both the individuals and the organizations concerned. This study presents the perceptions of staff members, in the form of recognized trade union representatives, of workplace bullying at the Nelson Mandela Metropolitan University. The theoretical framework that informed the study comprised the dispositional and the ecological model that emphasised Ubuntu and the cultural values of the University. The research approach was carried out through qualitative and exploratory methods. Through primary and secondary data collection, a purposive sample of semi-structured interviews was collected in the context of the aim and the objectives of the study. It analysed the importance of an anti-bullying policy, management styles, power imbalances, the impact of bullying on staff and institution health and explored the existing supportive systems that deal with grievances procedures. This study concludes with concrete evidence that workplace bullying existed in Nelson Mandela University and there were no policies to effect control over perpetrators’ acts. Based on the findings of the study, recommendations are made regarding a strategy on how management can effectively address bullying complaints without prejudice and discrimination, such as an anti-bullying policy, and creating continuous awareness of the phenomenon.
- Full Text:
- Date Issued: 2018
- Authors: Adesemowo, Bosede Olaitan
- Date: 2018
- Subjects: Bullying in the workplace , Harassment Work environment
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/23404 , vital:30539
- Description: During the past decade bullying has received growing attention in organizational research. Workplace bullying is a complex phenomenon with a variety of situational, dispositional and systemic influences and it has been defined as “status-blind interpersonal hostility that is deliberate, repeated and sufficiently severe as to harm the targeted person's health or economic status” (Namie, 2003:3). A literature overview revealed the destructive consequences of bullying, such as trauma, suicide, depression, anxiety, stress, lowered self-esteem, anger and a lessening of productivity for both the individuals and the organizations concerned. This study presents the perceptions of staff members, in the form of recognized trade union representatives, of workplace bullying at the Nelson Mandela Metropolitan University. The theoretical framework that informed the study comprised the dispositional and the ecological model that emphasised Ubuntu and the cultural values of the University. The research approach was carried out through qualitative and exploratory methods. Through primary and secondary data collection, a purposive sample of semi-structured interviews was collected in the context of the aim and the objectives of the study. It analysed the importance of an anti-bullying policy, management styles, power imbalances, the impact of bullying on staff and institution health and explored the existing supportive systems that deal with grievances procedures. This study concludes with concrete evidence that workplace bullying existed in Nelson Mandela University and there were no policies to effect control over perpetrators’ acts. Based on the findings of the study, recommendations are made regarding a strategy on how management can effectively address bullying complaints without prejudice and discrimination, such as an anti-bullying policy, and creating continuous awareness of the phenomenon.
- Full Text:
- Date Issued: 2018
Stewardship and collaboration in multifunctional landscapes: a transdisciplinary enquiry
- Authors: Cockburn, Jessica Jane
- Date: 2018
- Subjects: Environmental management -- South Africa , Sustainable development -- South Africa , Ecosystem management -- South Africa , Social ecology -- South Africa , Interdisciplinary research
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/61267 , vital:27998
- Description: Social-ecological sustainability challenges, from the local to the global level, are of increasing concern. Stewardship has been proposed as a means of dealing with these challenges, but how can it be achieved in practice? In South Africa, the concept is put into practice by practitioners working with local stewards to facilitate more sustainable and equitable management of ecosystem services across landscapes. This landscape approach requires collaboration between multiple stakeholders, as social-ecological processes function beyond the boundaries of individual farms or villages. The aim of this research was to investigate the practice of stewardship and collaboration in multifunctional landscapes in South Africa through a transdisciplinary enquiry. This was achieved using a methodological framework based on critical complexity, transdisciplinarity, and critical realism. This framework was applied through an inductive, mixed methods research design which involved stewardship practitioners, stewards, and other stakeholders in the research. Practitioners' understandings of the stewardship concept vary, yet they coalesce around the idea of responsible use and care of nature. Accordingly, the primary role of stewards is to interact with nature responsibly and carefully, balancing the use of ecosystem services for their own benefit with broader social- ecological interests and needs. Although the biodiversity stewardship tool dominates stewardship practice in South Africa, more integrated social-ecological initiatives are also emerging, often hand-in-hand with this approach. Practitioners working in these initiatives face multiple interacting and mutually reinforcing enablers and barriers that facilitate or hinder collaboration for stewardship. Individual and social-relational enablers are pivotal to long-term sustainability of initiatives, whilst deep-seated inequalities and mistrust are significant barriers to collaboration. Despite such challenges, practitioners are succeeding in fostering collaboration by operating as hubs in the landscape. They are actively building new relationships and networks among diverse stakeholders to address shared sustainability challenges. This results in a patchwork of collaborative stewardship activity across the landscape, suggesting that stewardship and collaboration are fundamentally relational processes and that pluralistic approaches to sustainability are needed in multifunctional landscapes. Moreover, by re-focusing stewardship on stewards, practitioners are finding innovative ways to enable farmers to appreciate and practice stewardship, addressing the conflict between agriculture and conservation. Drawing on these findings, a critical realist analysis revealed underlying generative mechanisms that help to explain the challenges encountered in collaborative efforts toward stewardship. These mechanisms included, amongst others: individual stewards' values, societal constraints on the ability of stewards to express care, conflict between agriculture and conservation due to dominant agricultural approaches and neoliberal economic policies, and the divided and unequal nature of South African society. Operationalising transdisciplinary research enabled meaningful engagement with practitioner partners, allowing for novel insights and unexpected findings to emerge from practice-based knowledge. Putting transdisciplinarity into practice revealed the dynamic and multi-faceted role that researchers can play in transdisciplinary research, highlighting the importance of relational knowledge and competencies. Existing support systems and incentives within universities need to be re-configured to enable postgraduate students to conduct engaged science in service of society. , Kuyanda ukuxhalatyiswa yimiceli mngeni yobudlewlane obuhlala buhleli bezentlalo nendalo, ekuhlaleni nakwihlabathi. Kuphakanyiswe umbono wobugosa-bumeli (ubuphathi bendalo, stewardship) ukuze kuhlangatyezwane nale miceli mngeni, kodwa iza kwenziwa njani le nto? EMzantsi Afrika le ngcamango iye yabekwa entsebenzweni ngabo banezakhono no bugcisa besebenza namagosa-bameli asekuhlaleni, benceda ekulawulweni ngendlela ehlala ihleli nelinganayo iinkonzo zobudlelwane nendalo kuyo yonke imihlaba. Le ndlela yokusebenzisa le mihlaba ifuna intsebenziswano phakathi kwabo bonke ababandakanyekayo, njengoko ubudlelwane bentlalo nendalo busebenza ngaphaya kwemida yomfama ngamnye okanye iilali. Injongo yoluhlolisiso ibikukuphanda ngoqheliselo lobugosa-bumeli nentsebenziswano yeemihlaba esebenza ngendlela ezininzi eMzantsi Afrika kubuzwa kumasebe olwazi ohlukeneyo olwazi(transdisciplinarity). Oku kwathi kwaphunyezwa ngenkqubo ehlola izinto ezahlukahlukeneyo kwimigangatho eyahlukeneyo, isekelwe kwingcamango enzulu kunoko kubonakala kuqondakalayo, kumasebe olwazi ohlukeneyo, nakulwazi lwesayensi nentlalo. Le nkqubo yenziwa kusetyenziswa inkqubo yokuqokelela ulwazi luze luhlalutywe, iintlobo ezahlukeneyo zokwenza uhlolisiso, ezazibandakandakanya abanezakhono zobugosa-bumeli, amagosa-bameli nabanye ababandakanyekileyo kolu hlolisiso. Ingcamango zabanezakhono zobubugosa-bumeli ziyohluka, kanti iingcamango zinye ngokuphathelele ukusetyenziswa nokukhathelela indalo yemvelo. Phofu ke, indima esisiseko yamagosa-bameli kukuphembelelana ngokufanelekileyo nangenkathalo nendalo, bethelekisa ukusebenzisa iinkonzo zobudlelwane nendalo ukuze zincede bona, kunye nomdla neemfuno eziphangaleleyo zobudlelwane bendalo nentlalo. Nakubeni isixhobo Sobugosa-Bumeli Bendalo Eyahlukeneyo Yezityalo Nezilwanyana (Biodiversity Stewardship) isesona sitshotsha phambili kuqheliselo lobugosa-bumeli eMzantsi Afrika, zikhona nezinye izixhobo ezivelayo eziqukwayo kwiphulo lobudlelwane bendalo nentlalo, ezisoloko zisebenza kakuhle neli lokuqala. Abanezakhono nabasebenza kula maphulo bajamelene neendidi zokuphembelelana, iingxaki ezahlukeneyo, izisombululo nezithinteli ezinceda okanye zonakalise intebenziswano yobugosa-bumeli. Isisombululo ngasinye nezo zayanyaniswa nentlalo zibaluleke gqitha kumaphulo azakuhlala ehleli, nakubeni ukungalingani okuzinze nzulu nokungathembani iyimiqobo ebelulekileyo kwintsebenziswano. Nangona ikhona le micelimngeni, abanezakhono bayaphumelela ekukhuliseni intsebenziswano ngokuthi basebenze kwiindawo ezithile kwimihlaba. Bakha unxulumano olutsha noqhagamishelwano nababandakanyekileyo ngokwahluka kwabo ukuze kusingathwe nemiceli mngeni yokugcina ubudlelwane bendalo nentlalo buhlale buhleli. Oku kuye kwaphumela kwintsebenziswano yobugosa-bumeli ethe yakho pha na pha kule mihlaba, nto leyo ebonisa ukuba ubugosa- bumeli nentsebenziswano ngokusisiseko yinkqubo enxulumeneyo, kwaye iindlela ezininzi zokwenza ubudlelwane bendalo nentlalo buhlale buhleli ziyimfuneko kwimihlaba ekwenziwa izinto ezininzi kuyo. Ngapha koko, ngokuthi kuphindwe kunikelwe ingqalelo kubugosa-bumeli isiya kumagosa bameli, abanezakhono bafumana iindlela ezintsha zokunceda amafama axabise aze aqhelisele ubugosa-bumeli, ngolu hlobo kusingathwa ingxabano phakathi kwezolimo nolondolozo lwendalo. Xa sifunda koku, ukucamngca nzulu ngako kutyhile enye indlela eye yanceda ekucaciseni imiceli mngeni ekuhlangatyezwane nayo kwimigudu yentsebenziswano yobugosa-bumeli. Ezi ndlela zibandakanya, phakathi kwezinye: indlela aziphatha ngayo amagosa-bameli, iingcinezelo yabahlali ekubeni amagosa-bameli abonakalise inkathalo, ukungavisisani phakathi kwezolimo nolondolozo lwendalo ngenxa yendlela ezongamelayo nezisetyenziswayo zolimo, nemigaqo-nkqubo yezoqoqosho elawulwa bucala, nokwahlukana, ukungalingani kwabantu baseMzantsi Afrika. Ukusebenzisa uhlolisiso lwamasebe olwazi ohlukeneyo kubangele ukufuthelana okunentsingiselo namaqabane abo banezakhono, oku kuvulele iingcamango ezinzulu nokufumana izinto ebezingalindelekanga kulwazi olusekelwe kuqheliselo. Ukubeka ulwazi lwamasebe ahlukeneyo entsebenzweni kutyhile iindima ezahlukeneyo okanye ezininzi ezidlalwa ngabahlolisisi kuhlolisiso lolwazi lwamasebe ohlukeneyo, kubalaseliswa ukubaluleka kolwazi olunxulunyaniswayo nozimiselo. Iinkqubo zenkxaso nezinye izinto ezincedayo ezikhoyo kwiyunivesiti kufuneka ziphinde zakhiwe ukuze zincede abafundi abenza uhlolisiso balwenze benomfutho wesayensi enceda abahlali.
- Full Text:
- Date Issued: 2018
- Authors: Cockburn, Jessica Jane
- Date: 2018
- Subjects: Environmental management -- South Africa , Sustainable development -- South Africa , Ecosystem management -- South Africa , Social ecology -- South Africa , Interdisciplinary research
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/61267 , vital:27998
- Description: Social-ecological sustainability challenges, from the local to the global level, are of increasing concern. Stewardship has been proposed as a means of dealing with these challenges, but how can it be achieved in practice? In South Africa, the concept is put into practice by practitioners working with local stewards to facilitate more sustainable and equitable management of ecosystem services across landscapes. This landscape approach requires collaboration between multiple stakeholders, as social-ecological processes function beyond the boundaries of individual farms or villages. The aim of this research was to investigate the practice of stewardship and collaboration in multifunctional landscapes in South Africa through a transdisciplinary enquiry. This was achieved using a methodological framework based on critical complexity, transdisciplinarity, and critical realism. This framework was applied through an inductive, mixed methods research design which involved stewardship practitioners, stewards, and other stakeholders in the research. Practitioners' understandings of the stewardship concept vary, yet they coalesce around the idea of responsible use and care of nature. Accordingly, the primary role of stewards is to interact with nature responsibly and carefully, balancing the use of ecosystem services for their own benefit with broader social- ecological interests and needs. Although the biodiversity stewardship tool dominates stewardship practice in South Africa, more integrated social-ecological initiatives are also emerging, often hand-in-hand with this approach. Practitioners working in these initiatives face multiple interacting and mutually reinforcing enablers and barriers that facilitate or hinder collaboration for stewardship. Individual and social-relational enablers are pivotal to long-term sustainability of initiatives, whilst deep-seated inequalities and mistrust are significant barriers to collaboration. Despite such challenges, practitioners are succeeding in fostering collaboration by operating as hubs in the landscape. They are actively building new relationships and networks among diverse stakeholders to address shared sustainability challenges. This results in a patchwork of collaborative stewardship activity across the landscape, suggesting that stewardship and collaboration are fundamentally relational processes and that pluralistic approaches to sustainability are needed in multifunctional landscapes. Moreover, by re-focusing stewardship on stewards, practitioners are finding innovative ways to enable farmers to appreciate and practice stewardship, addressing the conflict between agriculture and conservation. Drawing on these findings, a critical realist analysis revealed underlying generative mechanisms that help to explain the challenges encountered in collaborative efforts toward stewardship. These mechanisms included, amongst others: individual stewards' values, societal constraints on the ability of stewards to express care, conflict between agriculture and conservation due to dominant agricultural approaches and neoliberal economic policies, and the divided and unequal nature of South African society. Operationalising transdisciplinary research enabled meaningful engagement with practitioner partners, allowing for novel insights and unexpected findings to emerge from practice-based knowledge. Putting transdisciplinarity into practice revealed the dynamic and multi-faceted role that researchers can play in transdisciplinary research, highlighting the importance of relational knowledge and competencies. Existing support systems and incentives within universities need to be re-configured to enable postgraduate students to conduct engaged science in service of society. , Kuyanda ukuxhalatyiswa yimiceli mngeni yobudlewlane obuhlala buhleli bezentlalo nendalo, ekuhlaleni nakwihlabathi. Kuphakanyiswe umbono wobugosa-bumeli (ubuphathi bendalo, stewardship) ukuze kuhlangatyezwane nale miceli mngeni, kodwa iza kwenziwa njani le nto? EMzantsi Afrika le ngcamango iye yabekwa entsebenzweni ngabo banezakhono no bugcisa besebenza namagosa-bameli asekuhlaleni, benceda ekulawulweni ngendlela ehlala ihleli nelinganayo iinkonzo zobudlelwane nendalo kuyo yonke imihlaba. Le ndlela yokusebenzisa le mihlaba ifuna intsebenziswano phakathi kwabo bonke ababandakanyekayo, njengoko ubudlelwane bentlalo nendalo busebenza ngaphaya kwemida yomfama ngamnye okanye iilali. Injongo yoluhlolisiso ibikukuphanda ngoqheliselo lobugosa-bumeli nentsebenziswano yeemihlaba esebenza ngendlela ezininzi eMzantsi Afrika kubuzwa kumasebe olwazi ohlukeneyo olwazi(transdisciplinarity). Oku kwathi kwaphunyezwa ngenkqubo ehlola izinto ezahlukahlukeneyo kwimigangatho eyahlukeneyo, isekelwe kwingcamango enzulu kunoko kubonakala kuqondakalayo, kumasebe olwazi ohlukeneyo, nakulwazi lwesayensi nentlalo. Le nkqubo yenziwa kusetyenziswa inkqubo yokuqokelela ulwazi luze luhlalutywe, iintlobo ezahlukeneyo zokwenza uhlolisiso, ezazibandakandakanya abanezakhono zobugosa-bumeli, amagosa-bameli nabanye ababandakanyekileyo kolu hlolisiso. Ingcamango zabanezakhono zobubugosa-bumeli ziyohluka, kanti iingcamango zinye ngokuphathelele ukusetyenziswa nokukhathelela indalo yemvelo. Phofu ke, indima esisiseko yamagosa-bameli kukuphembelelana ngokufanelekileyo nangenkathalo nendalo, bethelekisa ukusebenzisa iinkonzo zobudlelwane nendalo ukuze zincede bona, kunye nomdla neemfuno eziphangaleleyo zobudlelwane bendalo nentlalo. Nakubeni isixhobo Sobugosa-Bumeli Bendalo Eyahlukeneyo Yezityalo Nezilwanyana (Biodiversity Stewardship) isesona sitshotsha phambili kuqheliselo lobugosa-bumeli eMzantsi Afrika, zikhona nezinye izixhobo ezivelayo eziqukwayo kwiphulo lobudlelwane bendalo nentlalo, ezisoloko zisebenza kakuhle neli lokuqala. Abanezakhono nabasebenza kula maphulo bajamelene neendidi zokuphembelelana, iingxaki ezahlukeneyo, izisombululo nezithinteli ezinceda okanye zonakalise intebenziswano yobugosa-bumeli. Isisombululo ngasinye nezo zayanyaniswa nentlalo zibaluleke gqitha kumaphulo azakuhlala ehleli, nakubeni ukungalingani okuzinze nzulu nokungathembani iyimiqobo ebelulekileyo kwintsebenziswano. Nangona ikhona le micelimngeni, abanezakhono bayaphumelela ekukhuliseni intsebenziswano ngokuthi basebenze kwiindawo ezithile kwimihlaba. Bakha unxulumano olutsha noqhagamishelwano nababandakanyekileyo ngokwahluka kwabo ukuze kusingathwe nemiceli mngeni yokugcina ubudlelwane bendalo nentlalo buhlale buhleli. Oku kuye kwaphumela kwintsebenziswano yobugosa-bumeli ethe yakho pha na pha kule mihlaba, nto leyo ebonisa ukuba ubugosa- bumeli nentsebenziswano ngokusisiseko yinkqubo enxulumeneyo, kwaye iindlela ezininzi zokwenza ubudlelwane bendalo nentlalo buhlale buhleli ziyimfuneko kwimihlaba ekwenziwa izinto ezininzi kuyo. Ngapha koko, ngokuthi kuphindwe kunikelwe ingqalelo kubugosa-bumeli isiya kumagosa bameli, abanezakhono bafumana iindlela ezintsha zokunceda amafama axabise aze aqhelisele ubugosa-bumeli, ngolu hlobo kusingathwa ingxabano phakathi kwezolimo nolondolozo lwendalo. Xa sifunda koku, ukucamngca nzulu ngako kutyhile enye indlela eye yanceda ekucaciseni imiceli mngeni ekuhlangatyezwane nayo kwimigudu yentsebenziswano yobugosa-bumeli. Ezi ndlela zibandakanya, phakathi kwezinye: indlela aziphatha ngayo amagosa-bameli, iingcinezelo yabahlali ekubeni amagosa-bameli abonakalise inkathalo, ukungavisisani phakathi kwezolimo nolondolozo lwendalo ngenxa yendlela ezongamelayo nezisetyenziswayo zolimo, nemigaqo-nkqubo yezoqoqosho elawulwa bucala, nokwahlukana, ukungalingani kwabantu baseMzantsi Afrika. Ukusebenzisa uhlolisiso lwamasebe olwazi ohlukeneyo kubangele ukufuthelana okunentsingiselo namaqabane abo banezakhono, oku kuvulele iingcamango ezinzulu nokufumana izinto ebezingalindelekanga kulwazi olusekelwe kuqheliselo. Ukubeka ulwazi lwamasebe ahlukeneyo entsebenzweni kutyhile iindima ezahlukeneyo okanye ezininzi ezidlalwa ngabahlolisisi kuhlolisiso lolwazi lwamasebe ohlukeneyo, kubalaseliswa ukubaluleka kolwazi olunxulunyaniswayo nozimiselo. Iinkqubo zenkxaso nezinye izinto ezincedayo ezikhoyo kwiyunivesiti kufuneka ziphinde zakhiwe ukuze zincede abafundi abenza uhlolisiso balwenze benomfutho wesayensi enceda abahlali.
- Full Text:
- Date Issued: 2018
Still
- Authors: Hall, Leila
- Date: 2018
- Subjects: South African fiction (English) -- 21st century , Short stories, South African (English) -- 21st century
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/63638 , vital:28450
- Description: This thesis is a novella in fragments set in contemporary Lesotho. It tells the story of a Mosotho woman in her 30s who has spent a long time living out of the country. She returns to search for a former lover who she hasn’t seen for 15 years. The nonlinear narrative follows her journey, exploring a range of themes, including sexuality, gender and class relations, memory and time, relationship to place, non-conformity and defiance in the face of societal pressure and conformism. The style of writing is inspired by a diverse range of writers, including Sonallah Ibrahim for his understated, sparse and minimalist prose, Tina May Hall for her ability to tell a story in fragmented vignettes, Noy Holland for her understanding of time as synchronous and non-linear, and Ayi Kwei Armah for his skill in evoking the feelings, textures and specificities of a place.
- Full Text:
- Date Issued: 2018
- Authors: Hall, Leila
- Date: 2018
- Subjects: South African fiction (English) -- 21st century , Short stories, South African (English) -- 21st century
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/63638 , vital:28450
- Description: This thesis is a novella in fragments set in contemporary Lesotho. It tells the story of a Mosotho woman in her 30s who has spent a long time living out of the country. She returns to search for a former lover who she hasn’t seen for 15 years. The nonlinear narrative follows her journey, exploring a range of themes, including sexuality, gender and class relations, memory and time, relationship to place, non-conformity and defiance in the face of societal pressure and conformism. The style of writing is inspired by a diverse range of writers, including Sonallah Ibrahim for his understated, sparse and minimalist prose, Tina May Hall for her ability to tell a story in fragmented vignettes, Noy Holland for her understanding of time as synchronous and non-linear, and Ayi Kwei Armah for his skill in evoking the feelings, textures and specificities of a place.
- Full Text:
- Date Issued: 2018
Stories in watercolour
- Authors: Molefhe, Wame Miriam
- Date: 2018
- Subjects: Uncatalogued
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/63552 , vital:28436
- Description: Expected release date-April 2020
- Full Text:
- Date Issued: 2018
- Authors: Molefhe, Wame Miriam
- Date: 2018
- Subjects: Uncatalogued
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/63552 , vital:28436
- Description: Expected release date-April 2020
- Full Text:
- Date Issued: 2018
Strangers “at home”: gay, lesbian and bisexual students’ strategies for resisting heteronormativity in university residence life
- Munyuki, Chipo L, Vincent, Louise
- Authors: Munyuki, Chipo L , Vincent, Louise
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141680 , vital:37996 , DOI: 10.20853/32-3-2521
- Description: Higher education in post-apartheid South Africa has been concerned with the establishment of non-discriminatory institutions. However, research continues to highlight various experiences of exclusionary practices across universities in South Africa. In this article, we demonstrate the various coping mechanisms that some students who self-identify as gay, lesbian or bisexual in the university residences adopt to deal with the exclusionary practices that the dominant heteronormative culture of the institution (re)produces which positions them as “sexual strangers” within the institutional “home”. We adopt Vangelisti and Crumley’s (1998) three categories of behaviour namely “acquiescence” which we term here as endeavours to “fit in”, “invulnerability” which we identify as “keeping one’s distance”, “verbal active” as “voicing” and a fourth category we identify as “turning the tables on heteronormativity” in our discussion. We also highlight the various forms of responses that the institution adopts in its attempts to create a conducive environment for all.
- Full Text:
- Date Issued: 2018
- Authors: Munyuki, Chipo L , Vincent, Louise
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141680 , vital:37996 , DOI: 10.20853/32-3-2521
- Description: Higher education in post-apartheid South Africa has been concerned with the establishment of non-discriminatory institutions. However, research continues to highlight various experiences of exclusionary practices across universities in South Africa. In this article, we demonstrate the various coping mechanisms that some students who self-identify as gay, lesbian or bisexual in the university residences adopt to deal with the exclusionary practices that the dominant heteronormative culture of the institution (re)produces which positions them as “sexual strangers” within the institutional “home”. We adopt Vangelisti and Crumley’s (1998) three categories of behaviour namely “acquiescence” which we term here as endeavours to “fit in”, “invulnerability” which we identify as “keeping one’s distance”, “verbal active” as “voicing” and a fourth category we identify as “turning the tables on heteronormativity” in our discussion. We also highlight the various forms of responses that the institution adopts in its attempts to create a conducive environment for all.
- Full Text:
- Date Issued: 2018
Strategies for loan default reduction and management among SMMEs: the Old Mutual Masisizane Fund case study
- Authors: Ngcai, Sipho
- Date: 2018
- Subjects: Credit -- Management , Loans -- South Africa Small business -- Finance Small business -- Management New business enterprises -- Management Microfinance -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/33693 , vital:32968
- Description: The primary research objective of this study was to determine strategies for reducing loan defaulting and bad debts among the MF loan clients. The study was premised on the crucial significance of SMMEs in social and economic development. The study focused on MF with the aim of deciphering the factors that constrain loan recipients from servicing their loans leading to defaulting and bad debt. The research endeavors to contribute towards improving the ability of DFIs in general to recover loans while building the capacity of small businesses to become sustainable. The study adopted a qualitative approach and targeted eight (8) MF staff members responsible for loan administration and 15 MF loan recipients. In-depth interviews were conducted with the respondents. The interviews were transcribed and the data analysed through content analysis. The findings were aggregated in pre-determined themes as well as around emerging themes and sub-themes. The findings indicate that most MF loan recipients are identified through referrals from current and past clients, and other stakeholders; MF has a comprehensive and systematic loan application process; and MF provides support services to loan recipients. The findings also indicate that loan recipients default on payments because they lack financial management skills; sudden or sustained changes in the market; natural disasters, especially drought; and generally poor business management acumen. Other reasons for loan defaulting were caused by delays in funds disbursement by MF, ineffective monitoring mechanisms and approval of business enterprises that are not viable. The following recommendations were made: streamline the loan application process to increase effectiveness and efficiency; introduce an online loan application portal to complement and upgrade the current application process; deploy sector specialists when performing due diligence; provide business loans and grants in parallel in order to grow SMMEs while satisfying developmental needs; extend client site visits to include group meetings to facilitate peer learning and skills transfer; create a suite of capacity building and training support services for loan recipients; and develop a community of practice for DFIs to facilitate networking and information sharing.
- Full Text:
- Date Issued: 2018
- Authors: Ngcai, Sipho
- Date: 2018
- Subjects: Credit -- Management , Loans -- South Africa Small business -- Finance Small business -- Management New business enterprises -- Management Microfinance -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/33693 , vital:32968
- Description: The primary research objective of this study was to determine strategies for reducing loan defaulting and bad debts among the MF loan clients. The study was premised on the crucial significance of SMMEs in social and economic development. The study focused on MF with the aim of deciphering the factors that constrain loan recipients from servicing their loans leading to defaulting and bad debt. The research endeavors to contribute towards improving the ability of DFIs in general to recover loans while building the capacity of small businesses to become sustainable. The study adopted a qualitative approach and targeted eight (8) MF staff members responsible for loan administration and 15 MF loan recipients. In-depth interviews were conducted with the respondents. The interviews were transcribed and the data analysed through content analysis. The findings were aggregated in pre-determined themes as well as around emerging themes and sub-themes. The findings indicate that most MF loan recipients are identified through referrals from current and past clients, and other stakeholders; MF has a comprehensive and systematic loan application process; and MF provides support services to loan recipients. The findings also indicate that loan recipients default on payments because they lack financial management skills; sudden or sustained changes in the market; natural disasters, especially drought; and generally poor business management acumen. Other reasons for loan defaulting were caused by delays in funds disbursement by MF, ineffective monitoring mechanisms and approval of business enterprises that are not viable. The following recommendations were made: streamline the loan application process to increase effectiveness and efficiency; introduce an online loan application portal to complement and upgrade the current application process; deploy sector specialists when performing due diligence; provide business loans and grants in parallel in order to grow SMMEs while satisfying developmental needs; extend client site visits to include group meetings to facilitate peer learning and skills transfer; create a suite of capacity building and training support services for loan recipients; and develop a community of practice for DFIs to facilitate networking and information sharing.
- Full Text:
- Date Issued: 2018
Strategies teachers use to enhance grade 7 learners' reading comprehension skills in first additional language : four primary schools in Fort Beaufort
- Authors: Matakane, Euphimia Nobuzwe
- Date: 2018
- Subjects: English language -- Study and teaching -- South Africa -- Eastern Cape Reading comprehension -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , Education
- Identifier: http://hdl.handle.net/10353/9533 , vital:34363
- Description: This study focused on the strategies teachers use to enhance grade 7 learners’ reading comprehension skills in English First Additional Language at Fort Beaufort District. This study was impelled by low performance of learners in English language, where learners were unable to read and answer questions promptly due lack of understanding what they read. This study is qualitative in approach and underpinned interpretive paradigm position. Fort Beaufort Education District used as a case study whereby four schools were purposively selected and each with six grade seven learners, teachers and Subject Advisor. Qualitative data was gathered through semi-structured interviews, focus group interviews, observations and documents analysis. Interviews and focus groups discussions were taped, transcribed, analysed and the data was categorised into themes. The findings of this study disclosed the weak correlation between teachers’ knowledge and teaching practices and lack of support from the district. The participating teachers had limited understanding of reading comprehension strategies; as a result, they regarded teaching reading comprehension as a challenge since they do not know what comprehension strategies are, and how to apply them. Teachers lack theoretical knowledge and practice concerning the teaching of reading for comprehension resulted to a negative attitude and a total neglect towards teaching reading for comprehension. The participants showed dissatisfaction with the intervention of the Department of Education and the policies they impose on them. The Curriculum and Assessment Policy Statement has no clear guidelines on how to teach these strategies of reading comprehension, rather it places reading comprehension under three phases, namely: Pre-reading, During- reading and Post-reading. As they lack appropriate techniques to teach English comprehension effectively, more workshops should be done to empower them in order to become competent teachers. Teachers need more training on active approaches in order to change their comprehension instruction and to select texts that are relevant to learners’ life situations or experiences, in order for them to relate with the text and thus would cause them to read with understanding.
- Full Text:
- Date Issued: 2018
- Authors: Matakane, Euphimia Nobuzwe
- Date: 2018
- Subjects: English language -- Study and teaching -- South Africa -- Eastern Cape Reading comprehension -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , Education
- Identifier: http://hdl.handle.net/10353/9533 , vital:34363
- Description: This study focused on the strategies teachers use to enhance grade 7 learners’ reading comprehension skills in English First Additional Language at Fort Beaufort District. This study was impelled by low performance of learners in English language, where learners were unable to read and answer questions promptly due lack of understanding what they read. This study is qualitative in approach and underpinned interpretive paradigm position. Fort Beaufort Education District used as a case study whereby four schools were purposively selected and each with six grade seven learners, teachers and Subject Advisor. Qualitative data was gathered through semi-structured interviews, focus group interviews, observations and documents analysis. Interviews and focus groups discussions were taped, transcribed, analysed and the data was categorised into themes. The findings of this study disclosed the weak correlation between teachers’ knowledge and teaching practices and lack of support from the district. The participating teachers had limited understanding of reading comprehension strategies; as a result, they regarded teaching reading comprehension as a challenge since they do not know what comprehension strategies are, and how to apply them. Teachers lack theoretical knowledge and practice concerning the teaching of reading for comprehension resulted to a negative attitude and a total neglect towards teaching reading for comprehension. The participants showed dissatisfaction with the intervention of the Department of Education and the policies they impose on them. The Curriculum and Assessment Policy Statement has no clear guidelines on how to teach these strategies of reading comprehension, rather it places reading comprehension under three phases, namely: Pre-reading, During- reading and Post-reading. As they lack appropriate techniques to teach English comprehension effectively, more workshops should be done to empower them in order to become competent teachers. Teachers need more training on active approaches in order to change their comprehension instruction and to select texts that are relevant to learners’ life situations or experiences, in order for them to relate with the text and thus would cause them to read with understanding.
- Full Text:
- Date Issued: 2018
Strategies to facilitate the use of birth care provided by skilled birth attendants in the rural areas of Ghana
- Authors: Adatara, Peter
- Date: 2018
- Subjects: Maternity nursing -- Ghana , Neonatal nursing -- methods Delivery (Obstetrics) Midwifery -- Ghana
- Language: English
- Type: Thesis , Doctoral , DCur
- Identifier: http://hdl.handle.net/10948/23415 , vital:30541
- Description: Increasing skilled attendance during childbirth is well established in literature to play a significant role in averting the many preventable maternal deaths that occur in developing countries such as Ghana.Inadequate utilisation of skilled birth care services in Sub-Saharan Africa is believed to be a major hindrance to efforts aimed at improving the health of women, especially during delivery. There is low utilisation of birth care services provided by skilled birth attendants in the rural areas in Ghana. The purpose of this study was to develop strategies that could facilitate the utilisation of skilled birth care provided by skilled birth attendants in the rural areas of Ghana. The study adopted a qualitative, explorative, descriptive and contextual method to explore and describe women’s experiences regarding the utilisation or non-utilisation of skilled birth care services provided by skilled birth attendants in the rural areas in Ghana. The study was conducted in three phases: Phase One of this study described the research population, sampling method, data collection and analysis to obtain women’s experiences regarding the utilisation or non-utilisation of skilled birth care services. In this study, data were collected and analysed from the research population. The research population consisted of women who utilised skilled birth care attendants or unskilled care attendants during child birth. The data collection method used was individual interviews. Data collected from the interviews were transcribed verbatim and analysed according to the steps suggested by Tesch to identify themes and sub-themes. The study identified three themes and sub-themes: Theme 1: Experiences of participants related to the use of skilled birth care attendants; Theme 2: Participants expressed their reasons for choosing a home birth; Theme 3: Participants offered suggestions to improve skilled birth care at healthcare facilities. The findings in Phase one of this study formed the basis for the development of the strategies in Phase three. Phase Two of the research design focused on the development of a conceptual framework based on the research findings and utilized to develop strategies which skilled birth attendant may use to facilitate the use of skilled birth care services by women in the rural areas of Ghana where there is low utilisation of birth services provided by skilled birth attendants. The conceptual framework of Dickoff, James and Wiedenbach was used to provide a guide and a link between the different concepts in the research study. Phase Three of this study focused on the development of strategies that will facilitate an increased in the labouring women utilisation of the services provided by skilled birth attendants. The data obtained was used to developed three strategies such as collaboration, education and training, supportive supervision as well as community mobilisation and participation to guide skilled birth attendants to facilitate the utilisation of skilled birth care services during childbirth. The WHO Health for All model, the theoretical model underpinning this study, also guided the development of the strategies to facilitate labouring women utilisation of the services provided by skilled birth attendants. Recommendations regarding the implementation of a national collaborative, education and supportive supervision policies on a macro level are made, as well as recommendations for nursing practice, education and research. It is therefore concluded that the researcher succeeded in achieving the purpose for this study because the strategies which are understandable, clear, simple, applicable and significant to skilled birth care in rural areas has been developed for use by skilled birth attendants to facilitate the utilisation of skilled birth care provided by skilled birth attendants in the rural areas of Ghana.
- Full Text:
- Date Issued: 2018
- Authors: Adatara, Peter
- Date: 2018
- Subjects: Maternity nursing -- Ghana , Neonatal nursing -- methods Delivery (Obstetrics) Midwifery -- Ghana
- Language: English
- Type: Thesis , Doctoral , DCur
- Identifier: http://hdl.handle.net/10948/23415 , vital:30541
- Description: Increasing skilled attendance during childbirth is well established in literature to play a significant role in averting the many preventable maternal deaths that occur in developing countries such as Ghana.Inadequate utilisation of skilled birth care services in Sub-Saharan Africa is believed to be a major hindrance to efforts aimed at improving the health of women, especially during delivery. There is low utilisation of birth care services provided by skilled birth attendants in the rural areas in Ghana. The purpose of this study was to develop strategies that could facilitate the utilisation of skilled birth care provided by skilled birth attendants in the rural areas of Ghana. The study adopted a qualitative, explorative, descriptive and contextual method to explore and describe women’s experiences regarding the utilisation or non-utilisation of skilled birth care services provided by skilled birth attendants in the rural areas in Ghana. The study was conducted in three phases: Phase One of this study described the research population, sampling method, data collection and analysis to obtain women’s experiences regarding the utilisation or non-utilisation of skilled birth care services. In this study, data were collected and analysed from the research population. The research population consisted of women who utilised skilled birth care attendants or unskilled care attendants during child birth. The data collection method used was individual interviews. Data collected from the interviews were transcribed verbatim and analysed according to the steps suggested by Tesch to identify themes and sub-themes. The study identified three themes and sub-themes: Theme 1: Experiences of participants related to the use of skilled birth care attendants; Theme 2: Participants expressed their reasons for choosing a home birth; Theme 3: Participants offered suggestions to improve skilled birth care at healthcare facilities. The findings in Phase one of this study formed the basis for the development of the strategies in Phase three. Phase Two of the research design focused on the development of a conceptual framework based on the research findings and utilized to develop strategies which skilled birth attendant may use to facilitate the use of skilled birth care services by women in the rural areas of Ghana where there is low utilisation of birth services provided by skilled birth attendants. The conceptual framework of Dickoff, James and Wiedenbach was used to provide a guide and a link between the different concepts in the research study. Phase Three of this study focused on the development of strategies that will facilitate an increased in the labouring women utilisation of the services provided by skilled birth attendants. The data obtained was used to developed three strategies such as collaboration, education and training, supportive supervision as well as community mobilisation and participation to guide skilled birth attendants to facilitate the utilisation of skilled birth care services during childbirth. The WHO Health for All model, the theoretical model underpinning this study, also guided the development of the strategies to facilitate labouring women utilisation of the services provided by skilled birth attendants. Recommendations regarding the implementation of a national collaborative, education and supportive supervision policies on a macro level are made, as well as recommendations for nursing practice, education and research. It is therefore concluded that the researcher succeeded in achieving the purpose for this study because the strategies which are understandable, clear, simple, applicable and significant to skilled birth care in rural areas has been developed for use by skilled birth attendants to facilitate the utilisation of skilled birth care provided by skilled birth attendants in the rural areas of Ghana.
- Full Text:
- Date Issued: 2018
Strategies used by teachers to promote reading in grade 4 : a case of english first additional language learners
- Authors: Fesi, Liziwe
- Date: 2018
- Subjects: English language -- Study and teaching English language -- Rhetoric Reading -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/9264 , vital:34316
- Description: The study examines strategies used by teachers to promote reading: A Case of English First Additional Language Learners. The study was located within the constructivism paradigm of reading and used a qualitative research approach that incorporated a case study research design in the collection, analysis and interpretation of the data. The data instruments used were interviews and observations. Data were analyzed using non-statistical procedures. The findings of the study revealed that reading problems are still eminent in Grade Four. It was found that the resources in schools inhibits the progress to promote reading. The educational system is underdeveloped and under resourced with respect to reading materials, and schools are in a bad state due to obsolete facilities. Inadequate infrastructure is also another challenge since most of the participants reported that classes are overcrowded; thus, limiting the space to interact with learners. It was found that primary schools have no libraries; as a result, it was difficult for the teachers to instill the culture of reading. Some participants revealed that technology can be useful to encourage reading, however, their schools have no computer centers and most teachers do not know how to use computers. It emerged from the findings that parents fail to involve themselves in their children’s education. In addition, it was found that poor socio-economic backgrounds affect many homes, and this has a negative impact on schools. Most South African parents are found to be unable to support their children at all. There are also challenges interconnected with the English First Additional Language learners, the eccentricities of the English language, the teacher training and continuing professional development of teachers, as it emerged from the findings of this study that most teachers do not understand the reading strategies, skills of teaching reading and learners lack vocabulary, hence their resistance to reading. A comprehensive model of strategies to improve reading in primary schools was developed by the researcher based on the findings of the study and an extensive literature review.
- Full Text:
- Date Issued: 2018
- Authors: Fesi, Liziwe
- Date: 2018
- Subjects: English language -- Study and teaching English language -- Rhetoric Reading -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/9264 , vital:34316
- Description: The study examines strategies used by teachers to promote reading: A Case of English First Additional Language Learners. The study was located within the constructivism paradigm of reading and used a qualitative research approach that incorporated a case study research design in the collection, analysis and interpretation of the data. The data instruments used were interviews and observations. Data were analyzed using non-statistical procedures. The findings of the study revealed that reading problems are still eminent in Grade Four. It was found that the resources in schools inhibits the progress to promote reading. The educational system is underdeveloped and under resourced with respect to reading materials, and schools are in a bad state due to obsolete facilities. Inadequate infrastructure is also another challenge since most of the participants reported that classes are overcrowded; thus, limiting the space to interact with learners. It was found that primary schools have no libraries; as a result, it was difficult for the teachers to instill the culture of reading. Some participants revealed that technology can be useful to encourage reading, however, their schools have no computer centers and most teachers do not know how to use computers. It emerged from the findings that parents fail to involve themselves in their children’s education. In addition, it was found that poor socio-economic backgrounds affect many homes, and this has a negative impact on schools. Most South African parents are found to be unable to support their children at all. There are also challenges interconnected with the English First Additional Language learners, the eccentricities of the English language, the teacher training and continuing professional development of teachers, as it emerged from the findings of this study that most teachers do not understand the reading strategies, skills of teaching reading and learners lack vocabulary, hence their resistance to reading. A comprehensive model of strategies to improve reading in primary schools was developed by the researcher based on the findings of the study and an extensive literature review.
- Full Text:
- Date Issued: 2018
Strategy implementation at the Rand Water Board
- Authors: Leaver, Brian Jeffrey
- Date: 2018
- Subjects: Uncatalogued
- Language: English
- Type: text , Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10962/62118 , vital:28129
- Description: Expected release date-April 2019
- Full Text:
- Date Issued: 2018
- Authors: Leaver, Brian Jeffrey
- Date: 2018
- Subjects: Uncatalogued
- Language: English
- Type: text , Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10962/62118 , vital:28129
- Description: Expected release date-April 2019
- Full Text:
- Date Issued: 2018
Strength and conditioning of adolescent male cricket players
- Authors: Pote, Lee
- Date: 2018
- Subjects: Cricket South Africa , Cricket injuries South Africa , Cricket Physiological aspects , Cricket Coaching South Africa , Physical fitness for youth South Africa , CricFit
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63933 , vital:28508
- Description: Background: Modern day cricketers are faced with longer, more strenuous seasons which are more physically demanding than the traditional forms of the game. Due to these increased physical demands, players are more prone to both overuse injuries, particularly of the lower back (bowlers) and lower limbs (batsmen), as well as acute, impact injuries (fielders/wicket keepers). The increase in injury risk is of particular concern at younger levels as research has shown that adolescents are at a higher risk for injury than their adult counterparts. Therefore, there is a need for strength and conditioning programs that reduce the risk of injury and improve performance at this level. However, of the programs that are available, most are not multi-factorial in nature and are aimed at elite cricketers. This is of concern in low-to-middle income countries such as South Africa, where players often do not have access to facilities or equipment and thus need to be exposed to low-cost, no-cost training programs. Furthermore, most information is anecdotal and there is a distinct lack of injury prevention programs at an adolescent level. Objective: The purpose of this thesis was to investigate the strength and conditioning practices of adolescent cricket players, particularly from a South African context, where there is a distinct lack of resources. This was through the completion of three phases; firstly, a literature review was completed to determine the information currently available on injury prevention strategies in cricket. The review also examined the injury statistics of five major playing cricket nations. Secondly, a survey was conducted to determine the current strength and conditioning practices of schoolboy and university coaches in South Africa. Lastly, a novel intervention program (CricFit) was designed and implemented within an adolescent population. The main purpose of the intervention was to determine whether players’ physical fitness parameters improved over time and whether the risk of injury was reduced. Methods: For phase one of the thesis (review paper), a search of the different scientific databases was undertaken to determine the nature and incidence of injuries in cricket activity as well as well as current strength and conditioning practices in place to reduce these injuries. These injury statistics and prevention programs where then reviewed. For the survey based research, an online questionnaire, adapted from previous strength and conditioning studies, was sent to 38 school boy and 12 university teams that participated in the top competitions in South Africa. In addition to the previous questionnaires, cricket specific practices and injury statistic questions were added to the survey. The survey consisted of three sections: a general, cricket specific and injury and injury prevention section. The survey also allowed coaches at both university and school levels to describe their practices and ideas in order to understand their basic knowledge of scientifically-based principles of strength and conditioning. Thus coaches were encouraged to explain what conditioning practices they implemented through a number of open ended questions which were then analysed for minor and major themes. The focus of the intervention program was to improve general physical fitness for cricket players. The study was a pre- and post-test design where twenty eight schoolboy cricketers (aged 15-19 years) were allocated to a control (n=14) or experimental (n=14) group during the cricket pre-season period. Both groups performed traditional net and field based training over a four week period (one net and one field based session), with the experimental group performing an additional two, 35-45 minute, conditioning sessions per week (“CricFit” intervention program). The intervention consisted of exercises that centred on the movement demands associated with the sport of cricket as well as injury prevention exercises (specifically Nordic lowers and core strength). Prior to and post the four week intervention period, responses were measured using a test battery that was designed to replicate the demands of cricket activity. Results: The results indicate on overall thesis summary. The literature view showed that there is a limited amount of injury prevention programs available for adolescent cricket players. It was also confirmed that for both adolescent and adult players, fast bowlers (lower back), followed by batsmen (lower limbs) and then fielders (impact) are the most prone to injuries. The survey showed that schools and universities in South Africa do conduct some form of conditioning, workload monitoring and injury prevention exercises; however the incorrect practices are being administered when considering the movement demands and most common injuries in cricket. It was also shown that most coaches did not have the adequate qualifications and experience to implement acceptable strength and conditioning programs. For the intervention study, both the control and experimental groups showed significant (p<0.05) improvements in most responses, but the changes for the experimental group were greater than those shown in the control group. Furthermore, significant (p<0.05) changes were shown between the two groups (control vs. experimental) for percentage body fat (12 vs. 11%), sit and reach flexibility (40.79 vs. 80.50mm), plank time (105.36 vs. 185.29s), 20 m sprint time (3.27 vs. 2.84s), push ups (34 vs. 41) and 25 m shuttle distance (699.18 vs. 746.79m). Conclusion: Coaches need to be educated and trained to implement the correct strength and conditioning practices at an adolescent level as well as to better understand the link between the movement demands and principles of testing and training. An improved education process may be needed to improve the quality as well as the qualifications of strength and conditioning coaches. If coaches and trainers are educated properly, then the “CricFit” intervention program may be used to improve cricket specific fitness throughout the pre-season period. The “CricFit” programme is useful in countries such as South Africa, where often players do not have access to coaches and facilities and thus can be implemented easily with minimal cost.
- Full Text:
- Date Issued: 2018
- Authors: Pote, Lee
- Date: 2018
- Subjects: Cricket South Africa , Cricket injuries South Africa , Cricket Physiological aspects , Cricket Coaching South Africa , Physical fitness for youth South Africa , CricFit
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63933 , vital:28508
- Description: Background: Modern day cricketers are faced with longer, more strenuous seasons which are more physically demanding than the traditional forms of the game. Due to these increased physical demands, players are more prone to both overuse injuries, particularly of the lower back (bowlers) and lower limbs (batsmen), as well as acute, impact injuries (fielders/wicket keepers). The increase in injury risk is of particular concern at younger levels as research has shown that adolescents are at a higher risk for injury than their adult counterparts. Therefore, there is a need for strength and conditioning programs that reduce the risk of injury and improve performance at this level. However, of the programs that are available, most are not multi-factorial in nature and are aimed at elite cricketers. This is of concern in low-to-middle income countries such as South Africa, where players often do not have access to facilities or equipment and thus need to be exposed to low-cost, no-cost training programs. Furthermore, most information is anecdotal and there is a distinct lack of injury prevention programs at an adolescent level. Objective: The purpose of this thesis was to investigate the strength and conditioning practices of adolescent cricket players, particularly from a South African context, where there is a distinct lack of resources. This was through the completion of three phases; firstly, a literature review was completed to determine the information currently available on injury prevention strategies in cricket. The review also examined the injury statistics of five major playing cricket nations. Secondly, a survey was conducted to determine the current strength and conditioning practices of schoolboy and university coaches in South Africa. Lastly, a novel intervention program (CricFit) was designed and implemented within an adolescent population. The main purpose of the intervention was to determine whether players’ physical fitness parameters improved over time and whether the risk of injury was reduced. Methods: For phase one of the thesis (review paper), a search of the different scientific databases was undertaken to determine the nature and incidence of injuries in cricket activity as well as well as current strength and conditioning practices in place to reduce these injuries. These injury statistics and prevention programs where then reviewed. For the survey based research, an online questionnaire, adapted from previous strength and conditioning studies, was sent to 38 school boy and 12 university teams that participated in the top competitions in South Africa. In addition to the previous questionnaires, cricket specific practices and injury statistic questions were added to the survey. The survey consisted of three sections: a general, cricket specific and injury and injury prevention section. The survey also allowed coaches at both university and school levels to describe their practices and ideas in order to understand their basic knowledge of scientifically-based principles of strength and conditioning. Thus coaches were encouraged to explain what conditioning practices they implemented through a number of open ended questions which were then analysed for minor and major themes. The focus of the intervention program was to improve general physical fitness for cricket players. The study was a pre- and post-test design where twenty eight schoolboy cricketers (aged 15-19 years) were allocated to a control (n=14) or experimental (n=14) group during the cricket pre-season period. Both groups performed traditional net and field based training over a four week period (one net and one field based session), with the experimental group performing an additional two, 35-45 minute, conditioning sessions per week (“CricFit” intervention program). The intervention consisted of exercises that centred on the movement demands associated with the sport of cricket as well as injury prevention exercises (specifically Nordic lowers and core strength). Prior to and post the four week intervention period, responses were measured using a test battery that was designed to replicate the demands of cricket activity. Results: The results indicate on overall thesis summary. The literature view showed that there is a limited amount of injury prevention programs available for adolescent cricket players. It was also confirmed that for both adolescent and adult players, fast bowlers (lower back), followed by batsmen (lower limbs) and then fielders (impact) are the most prone to injuries. The survey showed that schools and universities in South Africa do conduct some form of conditioning, workload monitoring and injury prevention exercises; however the incorrect practices are being administered when considering the movement demands and most common injuries in cricket. It was also shown that most coaches did not have the adequate qualifications and experience to implement acceptable strength and conditioning programs. For the intervention study, both the control and experimental groups showed significant (p<0.05) improvements in most responses, but the changes for the experimental group were greater than those shown in the control group. Furthermore, significant (p<0.05) changes were shown between the two groups (control vs. experimental) for percentage body fat (12 vs. 11%), sit and reach flexibility (40.79 vs. 80.50mm), plank time (105.36 vs. 185.29s), 20 m sprint time (3.27 vs. 2.84s), push ups (34 vs. 41) and 25 m shuttle distance (699.18 vs. 746.79m). Conclusion: Coaches need to be educated and trained to implement the correct strength and conditioning practices at an adolescent level as well as to better understand the link between the movement demands and principles of testing and training. An improved education process may be needed to improve the quality as well as the qualifications of strength and conditioning coaches. If coaches and trainers are educated properly, then the “CricFit” intervention program may be used to improve cricket specific fitness throughout the pre-season period. The “CricFit” programme is useful in countries such as South Africa, where often players do not have access to coaches and facilities and thus can be implemented easily with minimal cost.
- Full Text:
- Date Issued: 2018
Strength and conditioning practices of high school rugby coaches: a South African context
- Authors: Robinson, Bradley Charles
- Date: 2018
- Subjects: Rugby football coaches South Africa , Rugby football Coaching , Rugby football Physiological aspects , Rugby football Training , High school students Social conditions
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/63459 , vital:28413
- Description: Although the sport of rugby union is well established, the strength and conditioning practices of high school level players are not well known. Therefore, the purpose of this study was to examine the current strength and conditioning practices that coaches implement at South African high school level rugby. A secondary purpose was to compare practices between different types of schooling systems available in South Africa. An online survey or in person interview (depending on the school), adapted from previous strength and conditioning questionnaires, was conducted with 43 responses; including 28 schools among the top 100 rugby schools in South Africa for 2016 and 15 no-fee paying public schools in the Eastern Cape Province of South Africa. Results indicated that the top 100 rugby schools implement conditioning practices similar to the best-known international practices compared to no-fee paying schools who lacked the knowledge and skills in various strength and conditioning principles. It was found that all no-fee paying school coaches had insufficient qualifications to administer the correct training techniques. Coaches at all schools lacked the appropriate knowledge on injury prevention and scientifically based training programmes. It was concluded that education and skills around the best strength and conditioning practices for school level coaches needs to be improved and particularly in less privileged schools. The main goal being to reduce the risk of injury and improve performance across all sectors of the rugby playing population within the country. This was deemed crucial to the transformation goals set out by the South African Rugby Union, which would benefit from player development in lower socioeconomic schools.
- Full Text:
- Date Issued: 2018
- Authors: Robinson, Bradley Charles
- Date: 2018
- Subjects: Rugby football coaches South Africa , Rugby football Coaching , Rugby football Physiological aspects , Rugby football Training , High school students Social conditions
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/63459 , vital:28413
- Description: Although the sport of rugby union is well established, the strength and conditioning practices of high school level players are not well known. Therefore, the purpose of this study was to examine the current strength and conditioning practices that coaches implement at South African high school level rugby. A secondary purpose was to compare practices between different types of schooling systems available in South Africa. An online survey or in person interview (depending on the school), adapted from previous strength and conditioning questionnaires, was conducted with 43 responses; including 28 schools among the top 100 rugby schools in South Africa for 2016 and 15 no-fee paying public schools in the Eastern Cape Province of South Africa. Results indicated that the top 100 rugby schools implement conditioning practices similar to the best-known international practices compared to no-fee paying schools who lacked the knowledge and skills in various strength and conditioning principles. It was found that all no-fee paying school coaches had insufficient qualifications to administer the correct training techniques. Coaches at all schools lacked the appropriate knowledge on injury prevention and scientifically based training programmes. It was concluded that education and skills around the best strength and conditioning practices for school level coaches needs to be improved and particularly in less privileged schools. The main goal being to reduce the risk of injury and improve performance across all sectors of the rugby playing population within the country. This was deemed crucial to the transformation goals set out by the South African Rugby Union, which would benefit from player development in lower socioeconomic schools.
- Full Text:
- Date Issued: 2018
Stress, resiliency and coping of hostel housemothers caring for children on the autistic spectrum
- Authors: Thiart, Sarita
- Date: 2018
- Subjects: Autism spectrum disorders -- Patients -- Home care , Caregivers -- Psychology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/23272 , vital:30510
- Description: Autism is a life-long neurological disease that manifests differently in every autistic person. Children with autism have difficulties with four developmental areas, namely: language and communication, social interaction, imagination, and sensory issues. These behaviours make it extremely difficult to care for, or teach, autistic children as these children often present with behaviours that are psychologically, cognitively and physically challenging. As there is only one government subsidised school with the expertise and support structures to teach and care for autistic children in the Eastern Cape, parents often have no option, but to place such children in residential care in order for the children to receive the expert teaching they need. As a result, hostel housemothers are often placed in parental roles as they provide much of the parenting on a daily basis. Many of these caregivers have their own families that also need support and care. This may place additional burdens on these employees that could lead to a variety of psychological and physical conditions, depending on their resilience, and ability to handle frequent stressful situations. It is for this reason that this study is imperative, as it will uncover the stressors experienced by the hostel housemothers who play such a pivotal role in the lives of autistic children. The results of the study will serve to inform possible future interventions. This is a qualitative study. Participants were obtained through purposive sampling, and data was analysed through a thematic analysis approach. The Salutogenesis theory of Antonovsky was used, which particularly looks at stressors, tension, breakdown, and Salutogenesis. The study has generated, in the researcher, an understanding of how hostel housemothers cope with the stressors of caring for autistic children, and intends to do the same for readers.
- Full Text:
- Date Issued: 2018
- Authors: Thiart, Sarita
- Date: 2018
- Subjects: Autism spectrum disorders -- Patients -- Home care , Caregivers -- Psychology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/23272 , vital:30510
- Description: Autism is a life-long neurological disease that manifests differently in every autistic person. Children with autism have difficulties with four developmental areas, namely: language and communication, social interaction, imagination, and sensory issues. These behaviours make it extremely difficult to care for, or teach, autistic children as these children often present with behaviours that are psychologically, cognitively and physically challenging. As there is only one government subsidised school with the expertise and support structures to teach and care for autistic children in the Eastern Cape, parents often have no option, but to place such children in residential care in order for the children to receive the expert teaching they need. As a result, hostel housemothers are often placed in parental roles as they provide much of the parenting on a daily basis. Many of these caregivers have their own families that also need support and care. This may place additional burdens on these employees that could lead to a variety of psychological and physical conditions, depending on their resilience, and ability to handle frequent stressful situations. It is for this reason that this study is imperative, as it will uncover the stressors experienced by the hostel housemothers who play such a pivotal role in the lives of autistic children. The results of the study will serve to inform possible future interventions. This is a qualitative study. Participants were obtained through purposive sampling, and data was analysed through a thematic analysis approach. The Salutogenesis theory of Antonovsky was used, which particularly looks at stressors, tension, breakdown, and Salutogenesis. The study has generated, in the researcher, an understanding of how hostel housemothers cope with the stressors of caring for autistic children, and intends to do the same for readers.
- Full Text:
- Date Issued: 2018
Students’ experiences of hunger at an institution of higher learning in South Africa
- Ntloko, Nkqubela Aphiwe Jackson
- Authors: Ntloko, Nkqubela Aphiwe Jackson
- Date: 2018
- Subjects: Hunger , College students -- Social aspects Universities and colleges -- Students College students -- Physiological aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/30353 , vital:30933
- Description: Student hunger is a violation of the right to sufficient food guaranteed in the Constitution section 7(2) (1996). The State must respect, protect, promote and fulfil this right in addition to all other rights in the Bill Rights. This study sought to gain an in-depth understanding of hunger, as experienced by students at Nelson Mandela University (NMU), furthermore the study sought to generate student-centred recommendations on sustainable ways to address student hunger. Data was collected using a semi-structured interview method from sixteen, registered NMU students who were purposively selected. Collected data were analysed using the eight steps suggested by Tesch (1990), in Creswell, (2009). Guba's model of trustworthiness was applied for data verification. Findings of the study suggest that student hunger is a multifaceted concept which includes both physical, material hunger as well as lack of basic needs. Food insecurity, structural poverty and structural inequalities (colonisation and dispossession) are some of the factors contributing to student hunger. Research results show that hunger negatively affects students’ academic and emotional well-being. Participants recommend the use of alternative funding models that can address student hunger; a new policy should be formulated to inform interventions to eradicate student hunger. Among these suggested interventions is the creation of employment opportunities for students, provision of food parcels, meal subsidy and meal cards. Ending student hunger requires a wide range of approaches that consider both the contributing factors as well as its adverse impact on students. The depth of hunger as experienced by students requires institutions of higher learning, in collaboration with students, government, NGO’s and the private sector to be proactive in enhancing the wellbeing of students suffering from hunger, through empowerment initiatives. In order to eradicate hunger and restore the dignity and well-being of students, a student-driven social justice, multi-disciplinary approach that is developmental in nature is required.
- Full Text:
- Date Issued: 2018
- Authors: Ntloko, Nkqubela Aphiwe Jackson
- Date: 2018
- Subjects: Hunger , College students -- Social aspects Universities and colleges -- Students College students -- Physiological aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/30353 , vital:30933
- Description: Student hunger is a violation of the right to sufficient food guaranteed in the Constitution section 7(2) (1996). The State must respect, protect, promote and fulfil this right in addition to all other rights in the Bill Rights. This study sought to gain an in-depth understanding of hunger, as experienced by students at Nelson Mandela University (NMU), furthermore the study sought to generate student-centred recommendations on sustainable ways to address student hunger. Data was collected using a semi-structured interview method from sixteen, registered NMU students who were purposively selected. Collected data were analysed using the eight steps suggested by Tesch (1990), in Creswell, (2009). Guba's model of trustworthiness was applied for data verification. Findings of the study suggest that student hunger is a multifaceted concept which includes both physical, material hunger as well as lack of basic needs. Food insecurity, structural poverty and structural inequalities (colonisation and dispossession) are some of the factors contributing to student hunger. Research results show that hunger negatively affects students’ academic and emotional well-being. Participants recommend the use of alternative funding models that can address student hunger; a new policy should be formulated to inform interventions to eradicate student hunger. Among these suggested interventions is the creation of employment opportunities for students, provision of food parcels, meal subsidy and meal cards. Ending student hunger requires a wide range of approaches that consider both the contributing factors as well as its adverse impact on students. The depth of hunger as experienced by students requires institutions of higher learning, in collaboration with students, government, NGO’s and the private sector to be proactive in enhancing the wellbeing of students suffering from hunger, through empowerment initiatives. In order to eradicate hunger and restore the dignity and well-being of students, a student-driven social justice, multi-disciplinary approach that is developmental in nature is required.
- Full Text:
- Date Issued: 2018
Students’ intentions and attitudes towards using Information and Communication Technology (ICT) for the purpose of counselling.
- Authors: Dlaza, Zikhona
- Date: 2018
- Subjects: Internet -- Psychological aspects Internet users -- Psychology
- Language: English
- Type: Thesis , Masters , MSoc. Sci (Psychology)
- Identifier: http://hdl.handle.net/10353/17553 , vital:41090
- Description: Information Communication Technology (ICT) is becoming popular especially within a university campus setting not only as a learning tool but also for the purpose of communication. Internationally there is an acknowledgement of the popularity of ICT in delivering mental health services. This study is built on that premise which indicates that ICT could serve as a viable tool for counselling interventions within a university setting. However, limited research has been done in this area and conflicting results have been reported especially related to gender. This study therefore aimed at exploring the intentions and attitudes of male and female students towards using ICT for counselling at a South African university. A quantitative research approach was employed to collect and analyze data. Data was collected amongst students using self-administered questionnaires with a sample of 266 (N = 266) respondents. Descriptive and inferential statistics were employed. The main findings of the study indicate that students have an intention to seek psychological help through the use of ICT counselling, which consequently positively influenced attitudes towards the utilization of ICT counselling. Results further indicate that gender and age differences amongst university students is significantly related to the intention to use ICT counselling. The information generated from this study has contributed to the limited body of literature on ICT in counselling psychology, more specifically in a university setting in South Africa. Overall, it encourages critical reflection on modern psychological practice to meet student’s needs.
- Full Text:
- Date Issued: 2018
- Authors: Dlaza, Zikhona
- Date: 2018
- Subjects: Internet -- Psychological aspects Internet users -- Psychology
- Language: English
- Type: Thesis , Masters , MSoc. Sci (Psychology)
- Identifier: http://hdl.handle.net/10353/17553 , vital:41090
- Description: Information Communication Technology (ICT) is becoming popular especially within a university campus setting not only as a learning tool but also for the purpose of communication. Internationally there is an acknowledgement of the popularity of ICT in delivering mental health services. This study is built on that premise which indicates that ICT could serve as a viable tool for counselling interventions within a university setting. However, limited research has been done in this area and conflicting results have been reported especially related to gender. This study therefore aimed at exploring the intentions and attitudes of male and female students towards using ICT for counselling at a South African university. A quantitative research approach was employed to collect and analyze data. Data was collected amongst students using self-administered questionnaires with a sample of 266 (N = 266) respondents. Descriptive and inferential statistics were employed. The main findings of the study indicate that students have an intention to seek psychological help through the use of ICT counselling, which consequently positively influenced attitudes towards the utilization of ICT counselling. Results further indicate that gender and age differences amongst university students is significantly related to the intention to use ICT counselling. The information generated from this study has contributed to the limited body of literature on ICT in counselling psychology, more specifically in a university setting in South Africa. Overall, it encourages critical reflection on modern psychological practice to meet student’s needs.
- Full Text:
- Date Issued: 2018
Students’ perceptions towards the influences of social media on students’ academic engagement at a tertiary institution: a case study on the use of Facebook and Twitter at Rhodes University
- Authors: Moongela, Harry
- Date: 2018
- Subjects: Facebook (Firm) , Twitter (Firm) , Social media in education -- South Africa -- Makhanda , Motivation in education -- South Africa -- Makhanda , Education, Higher -- Effect of technological innovations on -- South Africa -- Makhanda , Rhodes University
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/60730 , vital:27823
- Description: The use of social media has become an integral part of student’s academic lives and has had an impact on students’ academic engagement in tertiary institutions. Subsequently, researchers have shown an interest in investigating the impact of social media on students’ academic engagement. Despite the fact that researcher have shown interest, there still remains a limited number of studies that have discussed the effects of social media on students’ academic engagement, particularly within a South African context. Also, studies that have been carried have revealed limited and mixed findings. This study then aims to further investigate whether the exposure of students to social media has an effect on their academic engagement and how tertiary institutions together with students can use social media to improve students’ academic engagement. A qualitative research method using an interpretive (inductive) approach is carried out to find out students’ perceptions towards the use of social media and its influence on students’ academic engagement. The study then reveals recommendations from students’ perceptions on the effective ways of using social media to benefit students’ academic engagement in tertiary institutions.
- Full Text:
- Date Issued: 2018
- Authors: Moongela, Harry
- Date: 2018
- Subjects: Facebook (Firm) , Twitter (Firm) , Social media in education -- South Africa -- Makhanda , Motivation in education -- South Africa -- Makhanda , Education, Higher -- Effect of technological innovations on -- South Africa -- Makhanda , Rhodes University
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/60730 , vital:27823
- Description: The use of social media has become an integral part of student’s academic lives and has had an impact on students’ academic engagement in tertiary institutions. Subsequently, researchers have shown an interest in investigating the impact of social media on students’ academic engagement. Despite the fact that researcher have shown interest, there still remains a limited number of studies that have discussed the effects of social media on students’ academic engagement, particularly within a South African context. Also, studies that have been carried have revealed limited and mixed findings. This study then aims to further investigate whether the exposure of students to social media has an effect on their academic engagement and how tertiary institutions together with students can use social media to improve students’ academic engagement. A qualitative research method using an interpretive (inductive) approach is carried out to find out students’ perceptions towards the use of social media and its influence on students’ academic engagement. The study then reveals recommendations from students’ perceptions on the effective ways of using social media to benefit students’ academic engagement in tertiary institutions.
- Full Text:
- Date Issued: 2018
Studies in leaf domatia-mite mutualism in South Africa
- Authors: Situngu, Sivuyisiwe
- Date: 2018
- Subjects: Insect-plant relationships , Mites , Mutualism (Biology) , Biological pest control agents
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63334 , vital:28394
- Description: Plants have various traits which allow them to cope and resist their enemies including both insects and fungi . In some cases such traits allow plants to build mutualistic relationships with natural enemies of plant pests. This is the case in many dicotyledonous plants which produce leaf domatia. Leaf domatia are plant cavities usually found in the axils of major veins in the abaxial side of leaves. They are usually associated with mites and often mediate mutualistic relationships with predacious mites. Mites use leaf domatia primarily for shelter, to reproduce, and to develop. In turn, plants benefit from having predaceous mites on their leaves, because mites act as plant “bodyguards” and offer defence against pathogens and small arthropod herbivores. This phenomenon has been well documented all over the world, but Africa remains disproportionally understudied. The aim of this study was to fill the gap that exists in our knowledge of the extent of the distribution of leaf domatia-mite mutualisms and generate a better understanding of the diversity of mites found within leaf domatia from an African perspective. This was done by surveying plant species that bear leaf domatia from different vegetation types in South Africa. The plants with leaf domatia were examined for the presence of mites in order to determine patterns of mite abundance and diversity and, in so doing, address the following questions: • Does each tree species host have a specific mite or mite assemblage? • Do some mites prefer certain types of leaf domatia? • Do mites prefer a specific place in the tree canopy and does the microclimate in the tree canopy affect the distribution of mites? • Do different vegetation sites and types differ in their mite diversity and species composition? • Does mite abundance and diversity vary with seasons? Do coffee plantations have a different suite of mites than the adjacent forest? The anatomical structures of leaf domatia from six selected plant species(Coffea arabica, Gardenia thunbergia, Rothmannia capensis, Rothmannia globosa (Rubiaceae), Ocotea bullata (Lauraceae) and Tecoma capensis (Bignoniaceae) with different types of leaf domatia were also studied. The results from this study suggested that the key futures which distinguish domatia are the presence of an extra layer of tissue in the lower epidermis, a thick cuticle, cuticular folds, the presence of trichomes and an invagination. This study provides a better understating of the structure of leaf domatia. Leaf domatia bearing plants are widely distributed in South Africa, and species and vegetation-specific associations were assessed. Over 250 plant specimens with leaf domatia were collected and examined and more than 60 different mite species were found in association with the sampled plant species. The majority of mites found within the domatia of these tree species were predaceous and included mites from Stigmatidae, Tydeidae and Phytoseiidae. Furthermore, 15 new species were collected, suggesting that mites are understudied in South Africa. This study showed that the different vegetation types sampled did not differ markedly in terms of their mite biota and that similar mites were found across the region, and the association between leaf domatia and mites was found to be opportunistic and that mites had no preference for any particular domatia types. No host specificity relationship was observed between plants and mites. The assessment of mites associated with Coffea arabica showed that indigenous mites are able to colonise and establish a beneficial mutualism on exotic species. This is important as it ascertains that economically important plants that are cultivated outside their area of natural distribution can still benefit from this mutualism. This study also found that mite abundance and diversity in plants with leaf domatia were influenced by factors such as temperature, relative humidity and rainfall. Mite communities found in association with domatia changed as the year progressed and over the seasons. The seasonal fluctuations varied between the sampled plant species. In addition, this study found that mites were sensitive to extreme environmental conditions, and thus, mites preferred leaves found in the lower parts of the tree canopy and avoided exposed leaves. This study provides a better understanding of the distribution of domatia bearing plants in South Africa and their associated mites and contributes to our knowledge of the biodiversity of mites in the region. Furthermore, this study also adds to our understanding of the leaf domatia - mite mutualism in Africa. The applied example looking at the plant-mite mutualism in Coffea arabica highlights the importance of this mutualism in commercial plants.
- Full Text:
- Date Issued: 2018
- Authors: Situngu, Sivuyisiwe
- Date: 2018
- Subjects: Insect-plant relationships , Mites , Mutualism (Biology) , Biological pest control agents
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63334 , vital:28394
- Description: Plants have various traits which allow them to cope and resist their enemies including both insects and fungi . In some cases such traits allow plants to build mutualistic relationships with natural enemies of plant pests. This is the case in many dicotyledonous plants which produce leaf domatia. Leaf domatia are plant cavities usually found in the axils of major veins in the abaxial side of leaves. They are usually associated with mites and often mediate mutualistic relationships with predacious mites. Mites use leaf domatia primarily for shelter, to reproduce, and to develop. In turn, plants benefit from having predaceous mites on their leaves, because mites act as plant “bodyguards” and offer defence against pathogens and small arthropod herbivores. This phenomenon has been well documented all over the world, but Africa remains disproportionally understudied. The aim of this study was to fill the gap that exists in our knowledge of the extent of the distribution of leaf domatia-mite mutualisms and generate a better understanding of the diversity of mites found within leaf domatia from an African perspective. This was done by surveying plant species that bear leaf domatia from different vegetation types in South Africa. The plants with leaf domatia were examined for the presence of mites in order to determine patterns of mite abundance and diversity and, in so doing, address the following questions: • Does each tree species host have a specific mite or mite assemblage? • Do some mites prefer certain types of leaf domatia? • Do mites prefer a specific place in the tree canopy and does the microclimate in the tree canopy affect the distribution of mites? • Do different vegetation sites and types differ in their mite diversity and species composition? • Does mite abundance and diversity vary with seasons? Do coffee plantations have a different suite of mites than the adjacent forest? The anatomical structures of leaf domatia from six selected plant species(Coffea arabica, Gardenia thunbergia, Rothmannia capensis, Rothmannia globosa (Rubiaceae), Ocotea bullata (Lauraceae) and Tecoma capensis (Bignoniaceae) with different types of leaf domatia were also studied. The results from this study suggested that the key futures which distinguish domatia are the presence of an extra layer of tissue in the lower epidermis, a thick cuticle, cuticular folds, the presence of trichomes and an invagination. This study provides a better understating of the structure of leaf domatia. Leaf domatia bearing plants are widely distributed in South Africa, and species and vegetation-specific associations were assessed. Over 250 plant specimens with leaf domatia were collected and examined and more than 60 different mite species were found in association with the sampled plant species. The majority of mites found within the domatia of these tree species were predaceous and included mites from Stigmatidae, Tydeidae and Phytoseiidae. Furthermore, 15 new species were collected, suggesting that mites are understudied in South Africa. This study showed that the different vegetation types sampled did not differ markedly in terms of their mite biota and that similar mites were found across the region, and the association between leaf domatia and mites was found to be opportunistic and that mites had no preference for any particular domatia types. No host specificity relationship was observed between plants and mites. The assessment of mites associated with Coffea arabica showed that indigenous mites are able to colonise and establish a beneficial mutualism on exotic species. This is important as it ascertains that economically important plants that are cultivated outside their area of natural distribution can still benefit from this mutualism. This study also found that mite abundance and diversity in plants with leaf domatia were influenced by factors such as temperature, relative humidity and rainfall. Mite communities found in association with domatia changed as the year progressed and over the seasons. The seasonal fluctuations varied between the sampled plant species. In addition, this study found that mites were sensitive to extreme environmental conditions, and thus, mites preferred leaves found in the lower parts of the tree canopy and avoided exposed leaves. This study provides a better understanding of the distribution of domatia bearing plants in South Africa and their associated mites and contributes to our knowledge of the biodiversity of mites in the region. Furthermore, this study also adds to our understanding of the leaf domatia - mite mutualism in Africa. The applied example looking at the plant-mite mutualism in Coffea arabica highlights the importance of this mutualism in commercial plants.
- Full Text:
- Date Issued: 2018
Sub-volcanic intrusions and the link to global climatic and environmental changes:
- Svensen, Henrik H, Planke, Sverre, Neumann, Else-Ragnhild, Aarnes, Ingrid, Marsh, Julian S, Polteau, Stéphane, Harstad, Camilla H, Chevallier, Luc
- Authors: Svensen, Henrik H , Planke, Sverre , Neumann, Else-Ragnhild , Aarnes, Ingrid , Marsh, Julian S , Polteau, Stéphane , Harstad, Camilla H , Chevallier, Luc
- Date: 2018
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/145166 , vital:38414 , ISBN 9783319140841 , https://link.springer.com/chapter/10.1007/11157_2015_10
- Description: Most of the Large Igneous Provinces (LIPs) formed during the last 260 million years are associated with climatic changes, oceanic anoxia, or extinctions in marine and terrestrial environments. Current hypotheses involve (1) degassing of carbon from either oceans or shallow sea-bed reservoirs, (2) degassing from flood basalts, or from (3) sedimentary basins heavily intruded by LIP-related sills. These hypotheses are based on detailed geological and geochemical studies from LIPSs or relevant proxy data sequences. Here we present new data on gas generation and degassing from a LIP, based on the LA1/68 borehole north of the Ladybrand area in the Karoo Basin, South Africa.
- Full Text:
- Date Issued: 2018
- Authors: Svensen, Henrik H , Planke, Sverre , Neumann, Else-Ragnhild , Aarnes, Ingrid , Marsh, Julian S , Polteau, Stéphane , Harstad, Camilla H , Chevallier, Luc
- Date: 2018
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/145166 , vital:38414 , ISBN 9783319140841 , https://link.springer.com/chapter/10.1007/11157_2015_10
- Description: Most of the Large Igneous Provinces (LIPs) formed during the last 260 million years are associated with climatic changes, oceanic anoxia, or extinctions in marine and terrestrial environments. Current hypotheses involve (1) degassing of carbon from either oceans or shallow sea-bed reservoirs, (2) degassing from flood basalts, or from (3) sedimentary basins heavily intruded by LIP-related sills. These hypotheses are based on detailed geological and geochemical studies from LIPSs or relevant proxy data sequences. Here we present new data on gas generation and degassing from a LIP, based on the LA1/68 borehole north of the Ladybrand area in the Karoo Basin, South Africa.
- Full Text:
- Date Issued: 2018
Subjective measurements of persistence of time series
- Authors: Poswayo, Sihle
- Date: 2018
- Subjects: Time-series analysis , Space and time Time -- Philosophy
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/34372 , vital:33361
- Description: In this paper we suggest the use of subjective judgements to measure persistence in time series by comparing pairs of graphs with different Hurst exponents. The group of respondents consisted of 40 volunteers who were asked to identify the more jagged out of two graphs presented to them (that is, less persistent). The respondents were approached as a group and requested to work independently in the completion of ques- tionnaires administered to them. The respondents were supervised by the researchers. The graphs were simulated using time series package of Mathematica R [26]. The re- sponses were processed using an algorithm based on the Thurstone-Mosteller model for paired comparisons [29]. The results of the analysis show that the human eye is capable of distinguishing graphs of time series with Hurst exponent difference as small as only 0.02.
- Full Text:
- Date Issued: 2018
- Authors: Poswayo, Sihle
- Date: 2018
- Subjects: Time-series analysis , Space and time Time -- Philosophy
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/34372 , vital:33361
- Description: In this paper we suggest the use of subjective judgements to measure persistence in time series by comparing pairs of graphs with different Hurst exponents. The group of respondents consisted of 40 volunteers who were asked to identify the more jagged out of two graphs presented to them (that is, less persistent). The respondents were approached as a group and requested to work independently in the completion of ques- tionnaires administered to them. The respondents were supervised by the researchers. The graphs were simulated using time series package of Mathematica R [26]. The re- sponses were processed using an algorithm based on the Thurstone-Mosteller model for paired comparisons [29]. The results of the analysis show that the human eye is capable of distinguishing graphs of time series with Hurst exponent difference as small as only 0.02.
- Full Text:
- Date Issued: 2018