Browsing School of Agriculture, Natural Resources and Environmental Studies by Author "Owuor, J. B. Okeyo"
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Effect of Harvesting on Temporal Papyrus (cyperus papyrus L.) Population among Swamps of Winam Gulf in Lake Victoria Basin, Kenya
Owuor, J. B. Okeyo; L. Osumba, J. J.; Raburu, P.O (2008-07-29)Experiments were set to determine the effect of monthly and seasonal harvesting on temporal papyrus population density. Mean initial culm count was 21.6±2.26/m2. Initial culm counts varied across sites, but spatial ... -
Effective Dose of Crude Ethanol and Aqueous Extracts of Phytolacca Dodecandra (L’ Herit) on Anopheles Gambiae (Diptera: Culicidae) Larvae
Jared Owiti, Yugi; Owuor, J. B. Okeyo; Were, Kogogo Pamela; Luvaha, G.M; Okwiri, L.O; Rono, T.M; Vulule, John M. (bio, 2015-01)Objective: malaria vector control is either by adult or larvae management. This study reports on the effective dose of crude ethanol and aqueous extracts of leaf and mature green fruits of Endod; Phytolacca dodecandra (L’ ... -
Environmental implications of water as a natural resource based business: The case of non-revenue water in Kisumu City, Kenya
Onyango, Teresa Aoko; Nyamai, Daniel Odinde; Owuor, J. B. Okeyo (International Journal of Vocational and Technical Education, 2022-08-31)Most water utilities lose significant amounts of water in their distribution systems due to leakages, illegal consumption or accounting errors. These water losses are referred to as Non-Revenue Water (NWR) by the ... -
Impact of agro-industrial activities on the water quality of River Nyando, Lake Victoria Basin, Kenya
Raburu, P. O.; Owuor, J. B. Okeyo (2002)The impact of agro-industrial activities on the water quality within River Nyando, Lake Victoria Basin was studied at different hierarchical levels between August 1997 and June 1999. Triplicate water samples were collected ... -
Institutional pluralism, access and use of wetland resources in the Nyando Papyrus Wetland, Kenya
Nasongo, Serena; Fred, Zaal; Ton, Dietz; Owuor, J. B. Okeyo (Academic journal, 2015-03)Wetlands support livelihoods of communities living around them as in the Nyando Papyrus Wetland in Kenya. The Nyando Papyrus Wetlands provide multiple resources hence there are multiple uses and users who often overlap ... -
Larviciding Potency of Water and Ethanol Extracts of Phytolacca dodecandra (L’ Herit) on Anopheles gambiae (Diptera: Culicidae)
Yugi, Jared Owiti; Owuor, J. B. Okeyo; Awiti, Caleb Auma; Juma, Jacqueline India; Were, Kogogo Pamela; Vulule, John M. (Mosquito Research, 2015)Introduction: Plant extracts are an attractive target for search of effective malaria vector control agents. The reason for this is that they present a cost effective, target specific and bio-degradable insecticides. The ... -
Shifts in the food of Nile tilapia, Oreochromis niloticus (L.) in Lake Victoria, Kenya
Njiru, M.; Owuor, J. B. Okeyo; Muchiri, M.; Cowx, I. G. (African Journal of Ecology, 2004)Studies of the food of introduced Nile tilapia, Oreochromis niloticus (L.) with respect to size, habitat and season were conducted between November 1998 and October 2000 in Kenyan waters of Lake Victoria. Stomach contents ... -
Some aspects of the biology and life-history strategies of Oreochromis variabilis (Boulenger 1906) in the Lake Victoria Basin
Maithya, J; Njiru , Moses; Owuor, J. B. Okeyo; Gichuki, J (Blackwell Publishing Asia Pty Ltd, 2012)Oreochromis variabilis (Boulenger), a fish species endemic to Lake Victoria, was abundant, forming an important component of the indigenous fisheries stocks before and up to the late-1950s. Catches declined drastically ...