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International Journal of Fisheries and Aquatic Studies
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E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2014, Vol. 2, Issue 2, Part A

Some aspects of the feeding ecology of Nile tilapia, Oreochromis niloticus in Lake Naivasha, Kenya


Author(s): Outa N. Otieno, N. Kitaka, J.M. Njiru

Abstract: A study was done on feeding ecology of re-introduced Oreochromis niloticus (L.) in Lake Naivasha, Kenya between November 2013 and February 2014. The main focus of the study was on fish size, diet, habitat, and diel feeding regime. 434 fish samples were collected every two weeks from five stations covering the entire lake by use of gill nets (50 mm to 150 mm mesh size) and beach seines (< 10 mm). Stomach contents of the 434 fish sampled were analysed using point method. The major diet of fish <10 cm total length was zooplankton and algae for bigger fish. There was spatial variation in diet with insects and algae dominating in the near shore and open water habitats respectively. Data on diel feeding regime indicated that O. niloticus is a diurnal feeder. The fish preferred Chlorophyceae but avoided Bacillariophyceae and Cyanophytes while copepods and cladocera were preferred to rotifers.



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How to cite this article:
Outa N. Otieno, N. Kitaka, J.M. Njiru. Some aspects of the feeding ecology of Nile tilapia, Oreochromis niloticus in Lake Naivasha, Kenya. International Journal of Fisheries and Aquatic Studies. 2014; 2(2): 01-07.
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