Assessment of physicochemical parameters in relation with fish ecology in Ishasha River and Lake Edward, Albertine Rift Valley, East Africa

Publication Type:Journal Article
Year of Publication:2014
Authors:M. Mbalassa, Bagalwa, J. J. M. , Nshombo, M. , Kateyo, M. E.
Journal:International Journal of Current Microbiology and Applied Sciences
Keywords:Albertine Rift Valley, Ishasha River, Lake Edward, Physicochemical parameters, water quality

The present study was designed to determine the physicochemical parameters status along lower Ishasha River and littoral zone of Lake Edward, East Africa, for a period of eight months from July 2001 to May 2002. Water samples were collected on monthly basis in eight sites (river and lake) and analyzed for surface water temperature, dissolved oxygen, pH, electrical conductivity, total dissolved solids, and water transparency. These parameters were compared with water quality standards to demonstrate their ability to support fish species in selected sites. Analysis showed longitudinal differences (p< 0.05) along the river. Water was slightly cool, well oxygenated and alkaline at upstream; and contained much more TDS and EC at downstream, indicating the impact of agriculture and deforestation on the river. In the littoral zone, except for DO, all parameters differed (p< 0.05) from site to site; owing to differences in effluent inputs from respective outlets. In overall, the mean values of the parameters remained within the safe limits of water quality standards during the study period in all sites; revealing that physicochemical parameters in these habitats were permissible for most aquatic species. But, measures should be taken to regulate agricultural and deforestation activities upriver to avoid advert [sic] conditions.

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