A5071081568- Aquatic Ecosystems and Biodiversity
- Aquatic Invertebrate Ecology and Behavior
- Fish Biology and Ecology Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Freshwater macroinvertebrate diversity and ecology
- Heavy metals in environment
- Aquaculture Nutrition and Growth
- Aquaculture disease management and microbiota
- Coral and Marine Ecosystems Studies
- Marine and fisheries research
- Environmental Toxicology and Ecotoxicology
- Crustacean biology and ecology
- Coastal wetland ecosystem dynamics
- Fish Ecology and Management Studies
- Diatoms and Algae Research
- Aquatic life and conservation
- Heavy Metal Exposure and Toxicity
- Fish biology, ecology, and behavior
- Water Quality and Pollution Assessment
Ministry of Agriculture and Livestock
2023-2024
University of Cape Coast
2024
Instituto Superior Politécnico de Gaza
2024
Chinhoyi University of Technology
2018-2021
University of Zimbabwe
2007-2014
This study investigated the application of anaesthetics in 23 private and government-owned hatcheries 10 provinces Zambia. The employed both qualitative quantitative research designs used a structured questionnaire to collect data from respondents. results showed that most (65%) were not using handling fish all (100%) (35%) clove powder as only type. Most respondents (61%) sure or did have information about availability anaesthetic substances their localities while 26% reported wider but 13%...
This study examined Copper (Cu), Iron (Fe), and Zinc (Zn) levels in Limnothrissa miodon fish from Lake Kariba Zambia their potential impact on human health. Two-gram samples each stratum underwent a 12-hour digestion, concentrations were determined using Microwave Plasma Atomic Emission Spectrometer. Results indicated that Cu, Fe, Zn fell within Food Agricultural Organization World Health safety limits. Estimated Daily Intake (EDI) Hazard Quotient (THQ) values for males females remained...
The invasion of Cherax quadricarinatus, the Australian redclaw crayfish, in Sanyati Basin Lake Kariba, Zimbabwe, is reported. A total 79 crayfish were caught at 10 out 12 sampling sites November–December 2012. average catch per unit effort (CPUE) varied from 1.1 to 4 trap night, carapace length ranged 29 93.5 mm, and weight 196.2 g. Most between 50 59.9 mm length. Males (average 82.6 g) significantly heavier than females (37.2 males larger length, width, chela width. feral population C....
The aim of this study was to assess and compare the water quality Gwebi Mukuvisi Rivers, on basis selected physicochemical variables macroinvertebrate community structure. Five sites where both rivers these were sampled three separate occasions between January July 1998. measured concentrations iron, chromium, zinc, lead, copper, manganese, chlorides, fluorides, sulphates, total phosphates, nitrates, ammonia, dissolved salts, oxygen, biological oxygen demand, as well pH, conductivity,...
Concentrations of aluminium, cadmium, chromium, cobalt, copper, iron, lead, nickel and zinc were determined in surface water, benthic sediments, the gills, liver stomach muscle tissues Oreochromis niloticus Clarias gariepinus peri-urban lakes Chivero Manyame, Zimbabwe. Five sites sampled each lake once per month November 2015, February, May, August 2016. Pollution load index detected no metal contamination, whereas geo-accumulation reflected heavy to extreme sediment pollution, with Fe, Cd,...
The effect of variations in the density a submerged macrophyte, Lagarosiphon ilicifolius, on epiphytic macroinvertebrate community structure shallow waters sheltered bay Lake Kariba were investigated. body size class distributions mayfly, Cloeon (Ephemeroptera: Baetidae), and damselfly family, Coenagrionidae, also assessed with respect to variation vegetation density. Macroinvertebrates sampled from low-, moderate- high-density beds L. ilicifolius. There no significant differences individual...
Anaesthetics in aquaculture serve as a stress avoidance mechanism, mitigating stress-related impacts during fish handling and transportation. This study assessed the efficacy of sodium bicarbonate clove stem powder anaesthetic agents for Nile Tilapia juveniles. Four hundred twenty uniform O. niloticus juveniles (5 ± 0.5 g, 74 5 mm) were exposed to varying concentrations (10, 15, 20, 25, 30, 35, 40 g/L) (0, 1, 3, 5, 7, 10, 15 20 L transparent plastic tanks. The results showed an inverse...
Vallisneria aethiopica and Lagarosiphon ilicifolius are common abundant submerged macrophytes in Lake Kariba, Zimbabwe. The two species have distinct structural morphologies, with consisting of long ribbon-like leaves, while has filiform stems numerous small alternate leaves. This study investigated the effect these architectural differences between plant on their epiphytic macroinvertebrate assemblages shallow inshore waters Kariba. Ten sites were sampled three occasions May July 2005. A...
Pollution threatens fish health in the eutrophic lakes, Chivero and Manyame, Zimbabwe. Histopathological tissue alterations of two commonly consumed fish: catfish, Clarias gariepinus, and; tilapia, Oreochromis niloticus, from Lakes Manyame were assessed between 2015 2016. Seventy-one (71) catfish 81 tilapia caught using gill nets, samples their gills, liver, kidney stomach collected microscopically for manifestations disease. Pathologies observed gills both lakes included lamellar fusion,...
Abstract The body-size distributions and biomass estimates of Caenis (Ephemeroptera: Caenidae), Cloeon Baetidae), Coenagrionidae (Odonata), Micronecta (Hemiptera: Corixidae), Chironominae (Diptera: Chironomidae) Orthocladiinae Chironomidae), the most common abundant insect taxa associated with a submerged macrophyte Lagarosiphon ilicifolius in Lake Kariba, are presented. has univoltine life cycle, whilst Cloeon, Coenagrionidae, have multivoltine cycles. Growth reproduction occurred all year...
The stomach contents of tigerfish Hydrocynus vittatus, caught in an angling competition on Lake Kariba, were examined to determine the extent which they feed invasive crayfish Cherax quadricarinatus. 281 during three tournaments (2013, 2014 and 2015) grouped into six main categories. proportion empty stomachs ranged from 4.6 13.9% males 11.9 29.1% females. food items according frequency occurrence fish (Limnothrissa miodon (69.0 ± 13.0%) remains (bones scales; 33.0 22.0%), Cichlidae (26.8...