Feeding ecology and population characteristics of Oreochromis niloticus (L.) and trophic interactions in the fish community of Nyanza Gulf, Lake Victoria, Kenya

Njiru, M. (1999) Feeding ecology and population characteristics of Oreochromis niloticus (L.) and trophic interactions in the fish community of Nyanza Gulf, Lake Victoria, Kenya. In: Tweddle, D. and Cowx, I.G. (eds.) Report on third Fisheries Data Working Group (FIDAWOG) workshop held at the Triangle Hotel, Jinja, 29 March to 1 April 1999. Jinja, Fisheries Data Working Group of the Lake Victoria Fisheries Research Project, pp. 68-72. (LVFRP Technical Document,6)

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Abstract

Oreochromis niloticus (L.) were caught by beach seining, hook and line and trawling from Nyanza Gulf, lake Victoria (Kenya) in order to study their feeding ecology and population characteristics. Collected fish were weighed and TL measured immediately after capture. Fish were dissected and sexed. Stomach contents were removed and preserved in 4% buffered formalin for laboratory analysis. In the laboratory items were sorted into categories such as three quarters, half and quarter and awarded 20, 15 and 5 points respectively. Main food items for O. niloticus from November 1998 to March 1999 were insects, algae, fish and plant material. Increase in insects in the diet of O. niloticus might be attributed to the lake infestation by water hyacinth which harbours different species of insects

Item Type: Book Section
Title: Feeding ecology and population characteristics of Oreochromis niloticus (L.) and trophic interactions in the fish community of Nyanza Gulf, Lake Victoria, Kenya
Personal Creator/Author:
CreatorsEmail
Njiru, M.
Title of Book: Report on third Fisheries Data Working Group (FIDAWOG) workshop held at the Triangle Hotel, Jinja, 29 March to 1 April 1999
Editors:
EditorsEmail
Tweddle, D.
Cowx, I.G.
Series Name: LVFRP Technical Document
Number: 6
Page Range: pp. 68-72
Date: 1999
Publisher: Fisheries Data Working Group of the Lake Victoria Fisheries Research Project
Place of Publication: Jinja
Projects: Lake Victoria Fisheries Research Project Phase II
Institution: Lake Victoria Fisheries Research Project Phase II
Issuing Agency: Lake Victoria Fisheries Organization
Additional Information: LVFRP/TECH/99/06
Uncontrolled Keywords: Africa, Lake Victoria; Kenya, Nyanza, Lake Victoria, Nyanza Gulf; aquatic insects; community composition; feeding; infestation; population factors; stomach content; trophic relationships; weeds; Oreochromis niloticus
Subjects: Fisheries
Biology
Item ID: 3754
Depositing User: Ms Maria Kalentsits
Date Deposited: 14 Jul 2010 06:59
Last Modified: 29 Sep 2011 16:58
Related URLs:
URI: http://aquaticcommons.org/id/eprint/3754

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  • Feeding ecology and population characteristics of Oreochromis niloticus (L.) and trophic interactions in the fish community of Nyanza Gulf, Lake Victoria, Kenya. (deposited 14 Jul 2010 06:59) [Currently Displayed]

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