A5012861460- Aquatic Ecosystems and Biodiversity
- Fish Biology and Ecology Studies
- Fish Ecology and Management Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Rangeland Management and Livestock Ecology
- Hydropower, Displacement, Environmental Impact
- Fish biology, ecology, and behavior
- Aquaculture Nutrition and Growth
- Conservation, Biodiversity, and Resource Management
- Isotope Analysis in Ecology
- Environmental Toxicology and Ecotoxicology
- Agriculture and Rural Development Research
- Freshwater macroinvertebrate diversity and ecology
- Coastal wetland ecosystem dynamics
- Child Nutrition and Water Access
- Marine and fisheries research
- Biological Control of Invasive Species
- Environmental and Social Impact Assessments
- African Botany and Ecology Studies
- Marine and coastal ecosystems
- Land Use and Ecosystem Services
- Coastal and Marine Management
- Physiological and biochemical adaptations
National Agricultural Research Institute
2008-2023
Busitema University
2023
National Agricultural Research Organisation
2020-2022
Makerere University
2019
Islamic University in Uganda
2019
Victoria University
2006
Lake Victoria is Africa's single most important source of inland fishery production. After it was initially fished down in the first half 20th century, became home to a series introduced food fishes, culminating eventual demographic dominance Nile perch, Lates niloticus. Simultaneously with changes fish stocks, experienced dramatic its ecology. The lake during century multispecies resting on diverse ecosystem, which native fishes were targeted. ended much more productive fishery, but one...
Summary 1. In sub‐Saharan Africa, tropical forests are increasingly threatened by accelerating rates of forest conversion and degradation. East the larger tracts intact rainforest lie largely in protected areas surrounded converted landscape. Thus, there is critical need to understand functional links between large‐scale land use changes river conditions, implications park boundaries on catchment integrity. 2. The objective this study was mosaic heavily pristine created protection...
Downing, A. S., E. Van Nes, J. Balirwa, Beuving, P. Bwathondi, L. Chapman, I. M. Cornelissen, G. Cowx, K. Goudswaard, R. Hecky, H. Janse, Janssen, Kaufman, Kishe-Machumu, Kolding, W. Ligtvoet, D. Mbabazi, Medard, O. C. Mkumbo, Mlaponi, T. Munyaho, Nagelkerke, Ogutu-Ohwayo, Ojwang, Peter, Schindler, Seehausen, Sharpe, Silsbe, Sitoki, Tumwebaze, Tweddle, de Wolfshaar, Dijk, Donk, Rijssel, Zwieten, Wanink, F. Witte, and Mooij. 2014. Coupled human natural system dynamics as key to the...
Equatorial fishes, and the critically important fisheries based on them, are thought to be at-risk from climate warming because fishes have evolved in a relatively aseasonal environment possess narrow thermal tolerance windows that close upper limits. We assessed survival, growth, aerobic performance critical maxima (CTmax) following acute 21 d exposures temperatures up 4°C higher than current for six species of freshwater indigenous tropical countries importance human consumption. All...
Abstract Inland fishery ecosystems in Africa are characterized by patterns of overexploitation, environmental degradation and exotic species introductions. Ecological complexity diversity aquatic habitats dictate that fishes general not evenly distributed a water body. However, fisheries management regimes tend to ignore this basic principle, assume generalized conditions body, focus more on ‘desired’ objectives such as maximizing catch. The result is disregard fish habitat boundaries...
Abstract Nile perch were secretly introduced into Lake Victoria in the 1950s, and officially 1960s, amid unresolved controversy. Proponents of view that introduction would improve fisheries production sport fishing. Although former objective was achieved, side effects dire, including extinction many native species, especially ecologically important haplochromines, because predation. The also changed habitat, trophic dynamics water clarity. change clarity is thought to be responsible for...
Abstract The freshwater fisheries of Africa are important sources income and protein for the people continent, stocks biodiversity world. This report discusses experience eight lakes (Baringo, Chad, Kariba, Malawi, Naivasha, Nakuru, Tanganyika Victoria), in order to provide an overview challenges facing African systems, interventions undertaken manage challenges, inputs that have been required, lessons learned guide further actions. In particular, Global Environment Facility promoting...
Abstract – Nile tilapia ( Oreochromis niloticus L.) is the dominant of introduced tilapiines in many East African lakes and has flourished presence perch Lates L.). We explored hypothesis that O. exhibits increased omnivory response to a decline abundance haplochromine cichlids. First, we quantified variation habitat use diet Lake Nabugabo, Uganda. Second, compared with (Nabugabo, Victoria) without (Mburo, Wamala, Nyamusingiri, Kyasanduka) perch. In higher level phytoplanktivory was observed...
(2008). Biodiversity conservation in African inland waters: Lessons of the Lake Victoria region. SIL Proceedings, 1922-2010: Vol. 30, No. 1, pp. 16-34.
Abstract In this study, we compare the diet, life history characters and abundance of Nile tilapia ( Oreochromis niloticus ) stocks between two crater lakes in western Uganda (Lake Nyamusingiri Lake Kyasanduka) that differ their fishing pressure. Both support native fish communities, but also harbour populations introduced O. . was characterized by a higher relative absolute (CPUE) haplochromine cichlids lower than Kyasanduka. addition, population exhibited smaller mean size juveniles These...
Lake Albert is located towards the tip of western arm African Great Rift Valley, between Uganda and Democratic Republic Congo. Despite presence several predatory fishes, including Nile perch (Lates niloticus), supports most diverse commercial fisheries in with at least 55 species that vary markedly size. The lake contributes 30% national fish production. Increased human activity around within Albert, especially oil gas exploration, may pose threats to well being lake, its communities...
Abstract The dynamics of inland valley wetlands landuse landcover (LULC) changes are ecological and economical significance hence necessitating up‐to‐date datasets resource status. Nalwekomba wetland is highly agriculturally utilised yet ecologically important threatened with conversion. Historical LULC data sets as bench marks justifying conservation lacking. Therefore, the spatial–temporal in were analysed through a combination remote sensing GIS, using satellite images 1990, 2000, 2010...
Abstract The stable isotopes of nitrogen ( δ 15 N) and carbon 13 C) provide powerful tools for quantifying trophic relationships flow to consumers in food webs; however, the isotopic signatures organisms vary within a lake. Assessment suite plants, invertebrates, fishes Lake Kyoga, indicated significant variation between two sites C (paired t = 6.305; df 14, P < 0.001 N paired 1.292; 14; 0.05). fish fauna Bukungu was generally more enriched (mean –16.37 ± 1.64‰) than Iyingo –20.80 2.41‰)...