Browsing School of Pure and Applied Sciences by Issue Date
Now showing items 1-20 of 259
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Ecology and Management of Lake Naivasha, Kenya, in Relation to Climatic Change, Alien Species' Introductions, and Agricultural Development
(University Of Nairobi, 1990)Lake Naivasha is an important freshwater resource for Kenya's foreign-currency-earning agriculture and tourism, and for water-supply. It has always experienced extensive water-level fluctuations as a consequence of irregular ... -
Comparative limnology, species diversity and biomass relationship of zooplankton and phytoplankton in five freshwater lakes in Kenya
(Springer, 1994)Comparative studies on the limnology, species diversity and standing stock biomass of phytoplankton and zooplankton in five freshwater lakes, Naivasha and Oloidien, Ruiru, Masinga and Nairobi reservoirs, were undertaken. ... -
Dissipation Behavior of Malathion and DimethoateResidues from the Soil and Their Uptake by Garden Pea(Pisum sativum)
(Environmemental Contamination and Toxicology, 2000)The contamination of soil by pesticide chemicals can occur through direct application to control some inhabiting insect pests of a variety of economic plants while indirect avenues can occur through aerial ... -
The dissipation of malathion and dimethoate from the pea plants (Pisum sativum) under controlled conditions
(Taylor and Francis, 2000)4C-malathion, [S-1,2-bis(ethoxycarbonyl)ethyl O,O-dimethyl phosphorodithioate] and 14C-dimethoate, [O,O-dimethyl S-(N-methylcarbamoylmethyl)phosphorodithioate] have been admin-istered to leaves of pea (Pisum ... -
Determination of serum isometamidium levels in sheep and goats under field conditions using isometamidium-ELISA
(2000)Twenty eight sheep and 28 goats were treated with isometamidium chloride (Samorin®, hone Merieux, Lyon, France) at a dose of 1 mg/kg body weight (bw) by intramuscular injection. All the animals were grazed in a tsetse-infested ... -
The dissipation and degradation of methoxy‐ 14C malathion in soil under tropical conditions
(Taylor & Francis Group, 2000)l4C-malathion[S-1,2-bis(ethoxycarbonyl) ethyl O,O-dimethyl phosphorodithioate] has been studied in soil under tropical field conditions by applying the 14C-malathion pesticide to soil in Polyvinyl chloride (PVC) pipes ... -
A Synoptic Ecopath model of biomass flows during two different static ecological situations in Lake Nakuru (Kenya)
(Department of Zoology, University of Nairobi, 2001)Trophic relationships inside the Lake Nakuru ecosystem during two different phases are described by using the ECOPATH model. This allows a partial explanation of the ecological changes observed in the lake and to show that ... -
THE MAJOR ENVIRONMENTAL FACTORS THAT INFLUENCE RAPID DISAPPEARANCE OF PESTICIDES FROM TROPICAL SOILS IN KENYA
(Toxicological & Environmental Chemistry, 2001)Results of field and laboratory studies on adsorption/desorption, leaching, dissipation, bound residue formation and metabolism of DDT, DDE, lindane, parathion, malathion, dimethoate and carbofuran in tropical soils in ... -
Biodiversity characteristics of small high-altitude tropical man-made reservoirs in the Eastern Rift Valley, Kenya
(University Of Nairobi, 2002)The biodiversity characteristics in eight small (0.065–0.249 km2) public man-made reservoirs in the central part of the Eastern Rift Valley, Kenya, were studied between 1995 and 1998. A total of 71 phytoplankton species ... -
Chemical Characteristics, with particular reference to phosphorus, of the rivers draining into Lake Naivasha, Kenya
(School of Biological Sciences, 2002)Macrophytes have been shown to perform important ecological roles in Lake Naivasha. Consequently, various studies regarding the impact of biotic factors on the macrophytes have been advanced but related studies on environmental ... -
Participatory investigations of bovine trypanosomiasis in Tana River District, Kenya
(Blackwell Science Ltd, 2002-04-04)Participatory research on bovine trypanosomiasis was conducted with Orma pastoralists in Tana River District, Kenya. The use of participatory methods to understand local perceptions of disease signs, disease causes, disease ... -
Bathymetry of Lake Bogoria, Kenya
(Nature Kenya/East African Natural History Society, 2003)This paper presents the first bathymetric map for the approximately 17 km by 2 km alkaline Lake Bogoria situated in the eastern Rift Valley of Kenya. Longitudinal and transverse cross sections of the lake are also provided. ... -
Evaluation of isometamidium levels in the serum of sheep and goats after prophylactic treatment against trypanosomosis
(Onderstepoort Journal of Veterinary Research, 2004)Evaluation of isometamidium levels in the serum of sheep and goats after prophylactic treatment against trypanosomosis. Onderstepoort Journal of Veterinary Research, 71:175–179 Isometamidium chloride has been used for the ... -
Comparing macrophyte herbivory by introduced Louisiana crayfish (Procambarus clarkii) (Crustacea: Cambaridae) and native Dytiscid beetles (Cybister tripunctatus) (Coleoptera: Dytiscidae), in Kenya
(2005)The omnivorous Louisiana crayfish, Procambarus clarkii, has caused significant changes to macrophyte communities worldwide and may have similar negative effects in Kenya if used as a biological control agent for snails ... -
Conditional scale function estimate in the presence of unknown conditional quantile function
(African Network of Scientific and Technical Institutions (ANSTI), 2005)Standard approach for modeling and understanding the variability of statistical data or, generally, dependant data, is often based on the mean variance regression models. However, the assumptions employed on standardized ... -
Exploring the trophic structure in organically fertilized and feed-driven tilapia culture environments using multivariate analyses
(AquacultureResearch, 2006)Reports of similar yields in manure and feed-driven tilapia culture environments raise questions on food utilization in these environments. The possibility that similar production rates are because of utilization of di¡erent ... -
Intensification of Agriculture as the Driving Force in the Degradation of Nzoia River Basin: the Challenges of Watershed Management
(2007)The Lake Victoria riparian countries suffer from devastating effects of floods and droughts occasioned by severe weather related natural phenomena. The floods often follow prolonged droughts that have become a mark of ... -
De bijdrage van visvijvers aan de nutriënthuishouding op gemengde kleinschalige landbouwbedrijven
(2007)Vijvers kunnen een aanzienlijke bijdrage leveren aan de nutriëntenkringloop op gemenge landbouwbedrijven. Het integreren van water- en landgebonden productie in gemengde bedrijven kan leiden tot een verhoogde efficiëntie ... -
Glossina pallidipes and host interactions: implications of host preference on transmission risk of Rhodesian sleeping sickness in Kenya
(2007)Host preference by tsetse flies, tsetse-host interaction and host diversity and abundance were evaluated in relation to transmission risk of rhodesian sleeping sickness in two tsetse subpopulations in Kenya. Bovidae provided ...
