https://commons.ufh.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10552 Wed 12 May 2021 23:28:23 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5360 0.05) although Xai Xai and Inhaca populations had some significant population comparisons for mtDNA (P < 0.05). AMOVA did not explain any significant variation at the between groups hierarchical level for any pre-defined groupings except for a mtDNA grouping which separated out Xai Xai and Inhaca from other sampling sites. SAMOVA, isolation by distance tests, structure analysis, principle component analysis and spatial autocorrelation analysis all indicated a single population of C. puniceus as being most likely. The migrate-n analysis provided evidence of current driven larval transport, with net migration rates influenced by current dynamics.Two hundred and thirty six unique presence points of C. puniceus were correlated with seasonal maximum and minimum temperature data and bathymetry to model the current distribution and predict future distribution changes of the species up until 2030. Eight individual species distribution models were developed and combined into a mean ensemble model using the Biomod2 package. Winter minimum temperature was the most important variable in determining models outputs. Overall the ensemble model was accurate with a true skills statistic score of 0.962. Binary transformed mean ensemble models predicted a northern and southern range contraction of C. puniceus' distribution of 15 percent; by 2030. The mean ensemble probability of occurrence models indicated that C. puniceus' abundance is likely to decrease off the southern Mozambique coastline but remain high off KwaZulu-Natal. The results of the genetic analysis support the theory of external recruitment sustaining the KwaZulu Natal fishery for C. puniceus. While the high genetic diversity and connectivity may make C. puniceus more resilient to disturbances, the loss of 15 percent; distribution and 11 percent; genetic diversity by 2030 will increase the species vulnerability. The decrease in abundance of C. puniceus off southern Mozambique together with current widespread exploitation levels could result in the collapse of the fishery. A single transboundary stock of C. puniceus highlights the need for co-management of the species. A combined stock assessment between South Africa and Mozambique and the development of further Marine Protected Areas off southern Mozambique are suggested as management options to minimise the vulnerability of this species.]]> Wed 12 May 2021 23:27:51 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3873 Wed 12 May 2021 23:26:47 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:20593 Wed 12 May 2021 23:23:55 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:26593 Wed 12 May 2021 23:23:43 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4111 Wed 12 May 2021 23:23:21 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5063 Wed 12 May 2021 23:21:52 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:26832 Wed 12 May 2021 23:21:22 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5096 Wed 12 May 2021 23:14:13 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:26731 Wed 12 May 2021 22:43:59 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5537 Wed 12 May 2021 22:37:25 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:9728 Wed 12 May 2021 22:27:23 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3874 Wed 12 May 2021 21:01:05 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5079 Wed 12 May 2021 20:48:27 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4694 Wed 12 May 2021 20:29:26 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4110 Wed 12 May 2021 20:25:26 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4775 Wed 12 May 2021 20:24:24 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4699 Wed 12 May 2021 20:20:44 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4702 Wed 12 May 2021 20:19:54 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4877 Wed 12 May 2021 20:17:39 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10638 Wed 12 May 2021 20:11:33 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4701 Wed 12 May 2021 20:03:39 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4697 Wed 12 May 2021 20:00:41 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4782 Wed 12 May 2021 19:45:03 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5371 0.05). Higher proportions of animals had restricted access to feed at higher stocking densities (p = 0.03). The amount of formulated feed available on the feeder plate did not differ between stocking densities throughout the night (p = 0.19). Individual abalone spent more time above the feeder plate at higher stocking densities (p < 0.05). The percentage of time above the feeder plate, spent on the walls of the basket and on the feeding surface was not significantly different at densities of 20 %, 22 % and 24 % (p > 0.05) but abalone stocked at 16 % spent a greater percentage of time above the feeder plate on the feeding surface (83.99 ± 6.26 %) than on the basket walls (16.01 ± 6.26 %). Stocking density did not affect the positioning of abalone within a basket during the day or at night. Different size H. midae are affected differently by increases in stocking density in terms of growth performance. Findings from this research may be implemented into farm management strategies to best suit production goals, whether in terms of biomass production or individual weight gain. The fundamental mechanisms resulting in reduced growth at higher densities are not well understood, however results from behaviour observations suggest that competition for preferred attachment space and feed availability are contributing to decreased growth rates. With knowledge of abalone behaviour at different densities, innovative tank designs may be established in order to counter the reduction in growth at higher densities.]]> Wed 12 May 2021 19:32:53 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5357 Wed 12 May 2021 19:16:47 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4684 Wed 12 May 2021 19:10:57 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4706 Wed 12 May 2021 19:03:15 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5056 53% TiO₂); the ilmenite high with zircon and rutile shows tendency to increase northwards while ilmenite low increase southwards. Zircon, monazite, rutile, chromite, kyanite and staurolite show low variability, which is probably associated with high resistance of minerals for abrasion during transportation and diagenesis. The depositional model of the Namalope deposit, in the flat area and wet concentrate plant B in particular, suggests deposition in a shallow marine environment associated with regression for deposition of Unit 6, 7 and 9 and transgression during deposition of Unit 82. The spatial distribution of heavy minerals in the Namalope deposit and its environment of deposition are the key points for discovery of new deposits around the Namalope with the same characteristic of mineral assemblage and they are used for mine strategic plans such as update block model and mine design.]]> Wed 12 May 2021 19:01:48 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:28605 Tue 13 Jun 2023 12:32:30 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5362 Thu 29 Sep 2022 14:15:59 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4693 Thu 13 May 2021 16:06:23 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:9714 Thu 13 May 2021 13:29:20 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5152 Thu 13 May 2021 10:14:56 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4266 Thu 13 May 2021 08:07:04 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5074 Thu 13 May 2021 07:43:59 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4700 Thu 13 May 2021 07:28:05 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5051 Thu 13 May 2021 07:26:32 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10353 Thu 13 May 2021 07:23:28 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4113 Thu 13 May 2021 07:20:46 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4116 Thu 13 May 2021 07:05:48 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5874 Thu 13 May 2021 07:05:06 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4171 Thu 13 May 2021 06:53:01 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:26352 Thu 13 May 2021 06:52:04 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4688 Thu 13 May 2021 06:45:22 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5366 Thu 13 May 2021 06:43:37 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10556 Thu 13 May 2021 06:25:31 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10553 Thu 13 May 2021 06:01:42 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10362 Thu 13 May 2021 05:29:40 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5059 Thu 13 May 2021 05:24:10 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5543 Thu 13 May 2021 05:21:09 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5057 Thu 13 May 2021 05:16:32 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5517 Thu 13 May 2021 05:10:35 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:26609 2.5Ga) and are located to the south and east of Lake Victoria on the Tanzania craton. The Tanzania Craton is surrounded by Usagaran 1.9 Ga rocks (the east African orogenic belt (EAO) better known as the Mozambique belt) to the east and the Ubendian belt to the south and west. Published reports show that the eastern part of the Tanzania Craton is dominated by the fragments of Archaean rocks. Metamorphism along East Africa and the Tanzania Craton is due to several geological events. These geological events include the intrusion of granites in the Archaean Tanzania Craton (3 Ga), subduction of ocean plate resulted to the formation of Usagaran belt (1.9 Ga), opening and closure of Mozambique Ocean, which resulted in the formation of the Mozambique belt between 700 – 800 Ma and the Pan African orogeny at 640 – 620 Ma, which is associated with the formation of Gondwana. It is believed that fragments from the Archaean Tanzania craton were re - metamorphosed during these events. The Handeni project (the focus of this thesis) is located in the northern portion of the eastern part of the Usagaran belt (1.9 Ga) comprising the eastern part of Archaean Tanzania Craton. The area is characterized by Proterozic rocks of basaltic composition. The documented 2.7 Ga rocks at the Kilindi Handeni Superterrane at the northern part of the Usagaran belt correlate well with 2.7 Ga of Nyanzian rocks of Archaean Tanzania craton. The Handeni project area is geologically dominated by metamorphosed and deformed units of quartzofeldspathic gneisses, migmatitic gneiss, garnet silicified rock, garnetiferous amphibolite, garnetiferous granulite, graphitic schist and hornblende pyroxenite. Intensive deformation features that were developed include folds (sheath folds, micro and macro scales), faults, shears and regional thrusts. This thesis focuses on identifying the protolith of the rocks, alteration minerals, and metamorphic assemblages in the project area in order to understand the timing of gold mineralization. Geological investigation of core, ore petrology and mineralogy, mineral composition by using JEOL microprobe analysis and XRF analysis of bulk rocks were utilized. All the analytical work was done at the Geology laboratory, Rhodes University. Petrographic analysis shows that the rocks sampled in the study area are characterized by alteration minerals such as calcite, dolomite and sericite. Sulphide minerals including chalcopyrite, pyrrhotite, pyrite, pentlandite and gersdorffite were identified. Gold mineralization is associated with disseminated sulphides in association with trace amounts of base metals. Four rock types were proposed as host rocks for the mineralization, namely garnet silicified rock with superimposed quartz veins, garnetiferous amphibolite, garnetiferous granulite and hornblende pyroxenite. Fold troughs, filled fractures associated with episodes of folding, quartz veins and shear zones are suggested as gold precipitation sites. The presence of high grade metamorphic rocks containing gold, intermediate to low grade assemblages with sulphides and associated hydrothermal alteration as well as a complex deformation history suggests that the Handeni mineralization took place over an extended time period stretching from a ductile to a brittle environment.]]> Thu 13 May 2021 05:05:57 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5849 Thu 13 May 2021 04:53:41 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10490 Thu 13 May 2021 04:45:48 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4169 Thu 13 May 2021 04:27:15 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5054 Thu 13 May 2021 04:16:30 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5875 Thu 13 May 2021 04:15:57 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5157 Thu 13 May 2021 04:11:54 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5369 Thu 13 May 2021 04:07:40 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5428 Thu 13 May 2021 04:06:26 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5957 Thu 13 May 2021 03:45:52 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10439 Thu 13 May 2021 03:39:30 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4259 Thu 13 May 2021 03:31:23 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10442 Thu 13 May 2021 03:30:43 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10662 Thu 13 May 2021 03:16:19 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4170 Thu 13 May 2021 03:15:16 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5915 Thu 13 May 2021 02:55:06 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:26594 Thu 13 May 2021 02:50:03 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5154 Thu 13 May 2021 02:43:06 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:21113 Thu 13 May 2021 02:40:39 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5055 Thu 13 May 2021 02:32:25 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4168 Thu 13 May 2021 02:23:44 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4167 Thu 13 May 2021 02:19:26 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4878 Thu 13 May 2021 01:55:50 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5061 Thu 13 May 2021 01:52:51 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4166 Thu 13 May 2021 01:35:56 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4500 Thu 13 May 2021 01:23:39 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:2480 Thu 13 May 2021 01:14:46 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5847 Thu 13 May 2021 01:12:18 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10361 Thu 13 May 2021 01:10:37 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5094 Thu 13 May 2021 01:06:35 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10726 Thu 13 May 2021 01:03:05 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4456 Thu 13 May 2021 00:57:32 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10346 Thu 13 May 2021 00:51:42 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10433 Thu 13 May 2021 00:50:43 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10348 Thu 13 May 2021 00:43:08 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5876 Thu 13 May 2021 00:41:55 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:26590 Thu 13 May 2021 00:39:44 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4119 Thu 13 May 2021 00:36:05 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4774 Thu 13 May 2021 00:35:10 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:20495 Thu 13 May 2021 00:28:00 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3204 Thu 13 May 2021 00:22:59 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4692 Thu 13 May 2021 00:18:54 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10728 Thu 13 May 2021 00:10:48 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5358 1000 m³ of nutrient enriched effluent every day is a resource with considerable potential. The benefits of developing this resource can contribute to cost-reduction at the brewery, more efficient water, nutrient and energy management at the brewery, and offer opportunities for job creation and potentially benefit local food security.]]> Thu 13 May 2021 00:03:14 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:9675 Thu 13 May 2021 00:00:39 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:29390 Sat 04 Dec 2021 12:43:33 SAST ]]> https://commons.ufh.ac.za/vital/access/manager/Repository/vital:40457 Fri 15 Mar 2024 12:25:35 SAST ]]>