Current composition, distribution and relative abundance of the fish stocks of Lake Victoria Uganda
1994
Okaronon, J.O. (Fisheries Research Institute, Jinja (Uganda))
An experimantal bottom trawl survey was carried out in Uganda sector of Lake Victoria during the period May 1993 through May 1995 with the aim of establishing the current composition, distribution and abundance of the fish stocks. A total of 205 successful one hour hauls were taken using 25.4mm. mesh size trawl net during the 19 cruises. Forteen fish taxa (excluding the Haplochromis) were recorded with Lates niloticus consisting the bulk (97) of the fish retained. Haplochromis and L. niloticus were encountered in all areas sampled while Nile tilapia (Oreochromis niloticus) and other tilapinines were restricted to waters less than 20 metres deep. An average catch of 154/kg hour was obtained in waters less than 30 metres deep. Species diversity and relative abudance varied with depth. Only two of the fifteen fish taxa (Haplochromis and L. niloticus) were recorded in waters deeper than 30 metres and the bulk of the fish by weight (92) was obtained in waters less than 30 metres
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