Saving the Endangered Native Victoria Tilapia, Oreochromis Variabilis Boulenger (1906), in Upper Victoria Nile

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dc.contributor.authorBassa, Samuel
dc.contributor.authorOgello, Erick Ochieng
dc.contributor.authorMusinguzi, Laban
dc.contributor.authorSekiranda, Stephen
dc.contributor.authorNakiyende, Herbert
dc.date.accessioned2022-11-25T15:02:43Z
dc.date.available2022-11-25T15:02:43Z
dc.date.issued2020
dc.description.abstractThis study investigated the catch estimates, mortality, growth, food and feeding habits, and water parameters of Oreochromis variabilis in Upper Victoria Nile (UVN) from 2008 to 2019. Catch rates ranged 0.32±0.08 to 3.42±1.13 kg, boat-1 , day-1 with the length-weight relationship indicating Isometric growth. Growth parameters obtained were L∞=36.75, K=0.44 yr-1 , t0=-0.4540, tmax=6.4years, ØL=2.774, ØW=-0.301. Total mortality (Z) was 1.74yr-1, natural mortality (M) =0.95yr-1 using riverine surface temperature (RST) of 26oC giving a fishing mortality F of 0.79 yr-1 and exploitation ratio (E) of 0.4504 showing that growth parameters concurs with annual estimates and yield (F=6.589; P±=0.05). Catch estimates correlated with water parameters that indicated a significant difference. Mortality parameters showed that the fishery could be experiencing exploitation pressure. Although growth rates revealed that the fish is a long-lived species, if managed properly, its population could recover. Therefore, culturing the species and restocking in rivers and lakes in which this specie was not observed in the East African region are recommended.en_US
dc.identifier.citationBassa, S., Getabu, A., Ogello, E., Taabu, A., Olokotum, M., Nakiyende, H., ... & Sekiranda, S. (2020). Saving the endangered Native Victoria Tilapia, Oreochromis variabilis Boulenger (1906), in Upper Victoria Nile. Uganda Journal of Agricultural Sciences, 20(1), 29-43.http://dx.doi.org/10.4314/ujas.v20i1.2en_US
dc.identifier.issn2410-6909
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/5435
dc.language.isoenen_US
dc.publisherUganda Journal of Agricultural Sciencesen_US
dc.subjectEndangered species, Asymptotic values, Mortality rates, Conservation.en_US
dc.titleSaving the Endangered Native Victoria Tilapia, Oreochromis Variabilis Boulenger (1906), in Upper Victoria Nileen_US
dc.typeArticleen_US
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