Invertebrate communities in northern Lake Victoria, with reference to their potential for fishery production

Ndawula, L.M. and Kiggundu, V. and Ochieng, H. (1999) Invertebrate communities in northern Lake Victoria, with reference to their potential for fishery production. In: Report on Fourth FIDAWOG Workshop held at Kisumu, 16 to 20 August 1999. Jinja, Uganda, Lake Victoria Fisheries Research Project, pp. 142-154. (LVFRP Technical Document,7)

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Abstract

The zooplankton and macrobenthic communities of Lake Victoria were sampled by lift net and Ponar grab, respectively. The zooplankton comprised copepods and cladocerans, rotifers and aquatic insect larvae. Most taxa exhibited wide distribution in the lake, with the exception of rotifers which were rare in deep offshore waters. The main components in the macro-benthos were chaoborid and chironomid larvae and molluscs. Caridina nilotica (Roux) and other groups were rare in the samples. Zooplankton density ranged from 100000 or more to 4 million ind. m2 and increased from the shallow inshore to deep offshore waters. Numerical dominance of cyclopoids and nauplius larvae was a common feature at all stations sampled. Most macrobenthic taxa were also widely distributed, although chaoborid and chironomid larvae were rare in the samples. Rastrineobola argentea (Pellegrin) and larval Lates niloticus (L.) ate mainly cyclopoid copepods, while cichlids showed a strong preference for adult insects. High ecological stability of the cyclopoids, and the zooplankton community in general, despite radical ecosystem changes in recent years, coupled with what appears to be high predation pressure, offers good prospects for the pelagic fishery in the lake.

Item Type: Book Section
Title: Invertebrate communities in northern Lake Victoria, with reference to their potential for fishery production
Personal Creator/Author:
CreatorsEmail
Ndawula, L.M.
Kiggundu, V.
Ochieng, H.
Title of Book: Report on Fourth FIDAWOG Workshop held at Kisumu, 16 to 20 August 1999
Series Name: LVFRP Technical Document
Number: 7
Page Range: pp. 142-154
Date: 1999
Publisher: Lake Victoria Fisheries Research Project
Place of Publication: Jinja, Uganda
Projects: Lake Victoria Fisheries Research Project Phase II
Issuing Agency: Lake Victoria Fisheries Organization
Additional Information: LVFRP/TECH/99/07; Page 146 was missing from the copy available to us for scanning
Uncontrolled Keywords: Africa; Lake Victoria; stock assessment; data collection; data report; zooplankton; artisanal fisheries
Subjects: Biology
Fisheries
Information Management
Item ID: 5000
Depositing User: Ms Maria Kalentsits
Date Deposited: 24 Mar 2011 10:29
Last Modified: 29 Sep 2011 15:35
Related URLs:
URI: http://aquaticcommons.org/id/eprint/5000

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