https://commons.ufh.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://commons.ufh.ac.za/vital/access/manager/Repository/vital:38956 Wed 12 May 2021 22:39:13 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4734 Wed 12 May 2021 19:22:15 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:9173 Wed 12 May 2021 18:36:34 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:30416 Wed 12 May 2021 18:30:18 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3380 Wed 12 May 2021 17:14:33 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:11421 Wed 12 May 2021 16:46:50 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5229 0.05) amount of variability (63%) was explained by a predictive model incorporating these variables as investigations were constrained by small sample sizes and aggregated catch information. Scientific survey data provided multi-species information and highlighted the high proportion of non-native fish species in Eastern Cape impoundments. Gillnet catches were influenced primarily by species composition and were less subject to fluctuations induced by environmental factors. Overall standardised gillnet CPUE was influenced by surface area, conductivity and age of impoundment. Although the model fit was not significant at the p<0.05 level, 23% of the variability in the data was explained by a predictive model incorporating these variables. The presence of species which could be effectively targeted by gillnets was hypothesised to represent the most important factor influencing catch rates. Investigation of factors influencing CPUE in impoundments dominated by Clarias gariepinus and native cyprinids indicated that warmer, younger impoundments and smaller, colder impoundments produced higher catches of C. gariepinus and native cyprinids respectively. A predictive model for C. gariepinus abundance explained a significant amount of variability (77%) in CPUE although the small sample size of impoundments suggests that predictions from this model may not be robust. CPUE of native cyprinids was influenced primarily by the presence of Labeo umbratus and constrained by small sample size of impoundments and the model did not adequately explain the variability in the data (r² = 0.31, p>0.05). These results indicate that angling catch- and scientific survey data can be useful in providing predictions of fish abundance that are biologically realistic. However, more data over a greater spatial scale would allow for more robust predictions of catch rates. This could be achieved through increased monitoring of existing resource users, the creation of a centralised database for catch records from angling competitions, and increased scientific surveys of South African impoundments conducted by a dedicated governmental function.]]> Wed 12 May 2021 16:19:14 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:66965 Thu 24 Aug 2023 13:31:54 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:9055 Thu 13 May 2021 08:24:22 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:9046 Thu 13 May 2021 06:28:12 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:9309 Thu 13 May 2021 06:01:21 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:11212 Thu 13 May 2021 05:19:32 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6058 Thu 13 May 2021 04:06:15 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:11439 Thu 13 May 2021 02:32:09 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:8611 Thu 13 May 2021 01:57:30 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:62788 Thu 04 May 2023 12:15:24 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:41797 Fri 20 Jan 2023 10:36:04 SAST ]]>