The diversity and dry season habitat associations of fish communities in the Kabompo River Basin, Upper Zambezi, Zambia
- Authors: Rennie, Craig Lawrence
- Date: 2022-04-06
- Subjects: Biodiversity Zambia Kabompo District , Ecology Zambia Kabompo District , Fish communities Zambia Kabompo District , Fishes Ecology Zambia Kabompo District , Freshwater habitats Zambia Kabompo District , Fishes Effect of human beings on Zambia Kabompo District , Fishes Climatic factors Zambia Kabompo District , Mesohabitat
- Language: English
- Type: Master's thesis , text
- Identifier: http://hdl.handle.net/10962/232261 , vital:49976
- Description: The Zambezian headwaters contain diverse fish communities which support thriving fisheries. This region and its fishes are under pressure from multiple anthropogenic threats, including overexploitation and large-scale developments with potential knock-on effects for the riparian communities. Previous studies have focused on known fisheries areas and the mainstem Zambezi River, neglecting large tributaries such as the Kabompo River. Consequently, little literature is available on the diversity and ecology of the fishes that inhabit these large tributaries, hindering the effective management and protection of biodiversity. This study aimed to fill the current knowledge gaps in the diversity and habitat associations of fish communities in the Upper Zambezi, using the Kabompo River as a case study. The first objective was to provide an updated checklist of the fishes of the Kabompo River basin using a compilation of historical data and field surveys. This study detailed the occurrence and distribution of 83 fish species within the Kabompo River basin. All these species have been recorded in the Upper Zambezi, with some of their ranges extending into the Middle (29 species) and Lower Zambezi (23 species) while others have more restricted distributions. The most diverse families were the Cyprinidae (26 species) and the Cichlidae (15 species). A number of potential undescribed species, whose taxonomic distinctiveness need further investigation were also collected. Taxonomic conflicts are also highlighted for some of the taxa that were previously considered to have broad geographic ranges or disjunct distributions. Consistent with findings from other studies within the region, the current taxonomy underestimates the diversity of fishes in the Kabompo River and Upper Zambezi. The second objective was to assess the habitat use of small-bodied fish communities during the low-flow period in 2019. Reconnaissance trips identified dominant mesohabitats along the middle Kabompo River around Jivundu. A total of 139 mesohabitats were sampled across the five dominant mesohabitats identified; Phragmites mauritianus, wood, rock, Vallisneria aethiopica and bare substrate. Catch per unit effort, species richness, Shannon diversity and Pielou’s evenness differed significantly between these mesohabitats. Twenty-six species showed significant associations (p < 0.05) with a specific mesohabitat type or environmental variable (current velocity or depth). Eight species were associated with the woody habitat, with three of these, E. radiatus, E. unitaeniatus, and P. ngamensis being almost exclusively associated with this habitat. Enteromius kerstenii, E. lineomaculatus and S. depressirostris were almost exclusively associated with P. mauritianus and represent potential indicator species for this habitat. A number of species were also with both P. mauritianus and woody habitats. Nine species showed statistically significant associations with the rocky mesohabitat, with Amphilius uranoscopus and Petrocephalus longicapitis, being almost exclusive to rocky sections of the river. Therefore, species such as A. uranoscopus are potential indicators for monitoring the integrity of rocky habitats under threat from sedimentation. The strong associations indicate that this comprehensive baseline may be valuable indicators/ proxies for identifying anthropogenic induced change in the Kabompo basin. This would provide a basis to determine fish responses to regional environmental changes associated with human activities. , Thesis (MSc) -- Faculty of Science, Ichthyology & Fisheries Science, 2022
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Towards qualifications for environmental practitioners: a study of roles and competencies of entry level environmental managers
- Authors: Dingela, Mcebisi Sidwell
- Date: 2002-04
- Subjects: Environmental management South Africa , Environmental policy South Africa , Environmental education South Africa , Vocational qualifications South Africa , Educational equalization South Africa , Occupational training South Africa , Training needs South Africa , National Qualifications Framework (NQF)
- Language: English
- Type: Master's thesis , text
- Identifier: http://hdl.handle.net/10962/245616 , vital:51388
- Description: The decision by the previous apartheid governments to deprive the black population of quality education and training has dealt both the people (student and workers) and the economy of this country a severe blow. That blow is demonstrated by the current lack of skills among the majority of people of this country, particularly the black workers who constitute the majority of the workforce. The post-apartheid government is making a strong attempt at redressing the past injustices in all its forms, of particular interest in this research project, the endeavours in the education and training sphere, specifically developments associated with the National Qualifications Framework. The passing into law of the South African Qualifications Act of 1995 and the formulation of the National Qualification Framework represent significant milestones towards redressing current education and training imbalances. In order to actualise the promises of these policies and laws, new qualifications will have to be developed. This research project explores training needs of environmental practitioners in three different contexts employing a combination of research methods, i.e. Case Study and a Survey. The research project sought to identify the roles and training needs of environmental management practitioners in fulfilling their job demands as well as for career advancement. The research also sought to identify through a survey training courses currently on offer in South Africa in the environmental management field. The cases revealed a range of roles and competencies required by 'entry-level' environmental managers. Of note was the observation that these roles were broader than what the traditional perspectives on environmental management might suggest, and competencies required included several social skills, in addition to various technical skills. The survey revealed a strong leaning towards technical competence among the majority of available training courses in environmental management; and that technical emphasis remained the case even among those courses that appeared to include at least one 'social' dimension. It thus seems that this emphasis on technical competence is not consistent with the job demands of the three studied environmental management practitioners. The research identified a need for an encompassing (broad) course or qualification at 'entry level' that would take into account the realities on the ground as they confront these practitioners on a daily basis. Such training will provide practitioners with the necessary competencies to function in this seemingly evolving field of environmental management. Suggestions to inform the development of an entry-level qualification or training programme are made as part of the recommendations flowing from the research findings. The suggested qualification 'framework' is based on generic areas identified among the research participants. More work is needed though in order to translate the suggestion into an accredited qualification. , Thesis (MEd) -- Faculty of Education, Education, 2002
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