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- Title
Resource–consumer relationships in Lake Victoria, East Africa.
- Authors
Branstrator, Donn K.; Mwebaza-Ndawula, Lucas; Montoya, Joseph P.
- Abstract
Resource–consumer relationships in Lake Victoria were investigated by use of stable isotope data. δ13C and δ15N signatures were determined for organisms at a deep (22 m) and a littoral (5 m) site in the Napoleon Gulf near Jinja, Uganda. Results suggest that two food chains operate at the deep site, one leading from a shrimp (Caridina nilotica) to juvenile Nile perch ( Lates niloticus), the second leading from zooplankton (copepods and cladocerans) to a cyprinid (Rastrineobola argentea) and lake flies (Chaoborus). Isotopic evidence suggests that shrimp eat suspended particulates and benthos, not crustacean zooplankton or water hyacinth ( Eichhornia crassipes). Resource–consumer relationships revealed in this study have implications for understanding future yields of the economically important Nile perch fishery.
- Subjects
EAST Africa; LAKE ecology; CARIDINA; NILE perch; ZOOPLANKTON; FOOD chains; STABLE isotopes in ecological research; AQUATIC biology
- Publication
Hydrobiologia, 2003, Vol 493, Issue 1-3, p27
- ISSN
0018-8158
- Publication type
Article
- DOI
10.1023/A:1025465119494