Browsing African Journal of Tropical Hydrobiology and Fisheries by Title
Now showing items 9-28 of 36
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Effect of Water Harvesting on Species Diversity and Overall Rangeland Recovery in Kagera Microcatchement
(LVFO, 2001)Plant species diversity was investigated on ridges with and without water harvesting structures. The effect of water harvesting technology on the soil properties and rangeland recovery was also investigated. The experimental ... -
Evaluation of external anchor tags for estimation of growth and survival in Tilapia (Oreochromis shiranus chilwae Trewavas)
(LVFO, 1995)The effects of tagging with Floy FD-68B T-bar anchor tags on estimates of growth in Tilapia (Oreochromis shiranus chilwaei were investigated in a pond and in a field experiment. In the pond experiment, mean length increments ... -
Evaluation of indigenous molluscicides in water against schistosomiasis vectors
(LVFO, 1995)Seven varieties of indigenous Phytolacca dodecandra L'Herrit (Phytolaccaceae) were field-tried for molluscicidal potency, varieties (U96) and (U95) collected from Kabarole and Kabale respectively were the most potent with ... -
Fishery methods and fish diversity in the Kilombero River in south-eastern Tanzania
(LVFO, 1996)Assessment of common fishery methods and of fish diversity was undertaken In two fishing camps on the Kilombero River in south-eastern Tanzania in surveys towards the end of the dry season. 1994. Fishermen identified 23 ... -
Fishery resources and some economic aspects of four fishing villages on lake George and Edward in the Queen Elizabeth National Park, Uganda
(LVFO, 1995)The fisheries resources of Lake George and Ugandan waters of Lake Edward are described. The main fish species currently observed in the commercial catches were determined and the reasons of changes in species composition ... -
Food and feeding habits of the African lungfish, Protopterus annectens (Owens) (Pisces: Sarcopterygii) in the flood plains of River Niger in Etsako east of Edo State, Nigeria
(LVFO, 2000)An analysis of the gut contents of African lungfish Protopterus annectens(O) using the frequency of occurrence, numerical and volumetric methods show that the fish has selective preference for diets of other fishes, ... -
Growth, mortality and recruitment of Nile tilapia (Oreochromis niloticus) (L.) (Cichlidae) in Lake Turkana (Kenya): Possible variations as assessed by length frequency analysis.
(LVFO, 1998)Estimates of growth, mortality and recruitment pattern of Nile tilapia iOreochromis niloticus) from Lake Turkana were obtained from two sets of length frequency distributions: one from HOPAON (1982) obtained in 1974 from ... -
Information from radio telemetry on movements and exploitation of naturalized rainbow trout, Oncorhynchus mykiss (Walbaum), in Kenya cold water streams
(2000)Rainbow trout populations in Kenya streams have declined rapidly over several decades. Therefore, we studied movements of rainbow trout, Oncorhynchus mykiss (Walbaum), in two third order streams (the Sagana and Thego) ... -
Morphometries, length-weight relationship and condition of Rastrineobola argentea (Pellegrin 1904) in the Winam Gulf of Lake Victoria (Kenya)
(LVFO, 1995)Correlation between total length (TL), fork length (FL) and standard length (SL) of Rastrineobola argente'{ ~ellegrin 1904) in the Winam Gulf of Lake Victoria indicate that FL = 0.92 TL - 0.74 and SL = 0.90 TL - 1.7~. ... -
The Nile perch processing industry in Tanzania: trends, issues and development
(LVFO, 2000)Under modern conditions of product competition, it is increasingly risky not to innovate and, at the same time, it is extremely expensive to do. Consumers always want a stream of new and improved products. Competition ... -
The patterns and trends of marketing and consumption of the fish of Lake Victoria (Kenya waters)
(LVFO, 1998)Over 90% of Kenya's fish is produced from Lake Victoria, its principle source of fish for domestic consumption and for export. The three fish species of most economic importance are Lates niloticus, Rastrineobola argentea ... -
Population parameters of Oreochromis leucostictus from Lake Naivasha, Kenya
(LVFO, 1996)Length-frequency data collected from fish landings on Lake Naivasha were used to estimate the growth parameters: total mortality (Z), growth performance index (¢'), exploitation rate and recruitment pattern in Oreochromis ... -
The Potential for further proliferation of Water Hyacinth in Lakes Victoria, Kyoga and Kwania and some urgent aspects for research
(LVFO, 1995)Shore environments of lakes Victoria and Kyoga with potential for the establishment and proliferation of water hyacinth were identified. They are characterised by: (i) shelter from violent off-shore and along-the-shore ... -
Potential Impacts of Kirinya Wetland in Treating Secondary Municipal Effluent from Jinja Stabilisation Ponds
(LVFO, 2001)Kirinya West wetland is located on the Northern shores of Lake Victoria in Jinja- Uganda The wetland receives secondary treated effluent from the stabilisation ponds owned and operated by the National Water and Sewerage ... -
Potential of Fungal Pathogens for Biological Control of Water Hyacinth
(LVFO, 2001)Surveys were undertaken in lakes Victoria, Kyoga and River Nile in Uganda between 2000 and 2001 to determine tungal pathogens associated with water hyacinth. Several potential pathogen isolates including Alternaria ... -
Preliminary investigation into the haematology of adult protopterus annectens (Owen) in Nigeria. (Short communication)
(LVFO, 2000)HaematologicaI values other than mean cell haemoglobin concentration, were consistently higher in the male Protopterus annectens(O) than the female. These all showed significant linear correlation with weight at 5% level ... -
A Review of Heavy Metal Removal Mechanisms in Wetlands
(LVFO, 1998)Heavy metals are released into the environment from a wide range of natural and anthropogenic sources. The rate of influx of these heavy metals into the environment exceeds their removal by natural processes. Aquatic ...