The changing ecosystem of Lake Victoria, East Africa

Lowe-McConnell, Rosemary (1994) The changing ecosystem of Lake Victoria, East Africa. Freshwater Forum, 4(2), pp. 76-89.

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Dramatic changes are occurring in the Lake Victoria ecosystem. Two-thirds of the endemic haplochromine cichlid species, of international interest for studies of evolution, have disappeared, an event associated with the sudden population explosion of piscivorous Nile perch (Lates: order Perciformes, family Centropomidae) introduced to the lake some thirty years ago. The total fish yield has, however, increased 5-fold from 1970 to 1990, but this yield is now dominated by just three fish species: the introduced Nile perch (Lates niloticus), Nile tilapia (Oreochromis niloticus), and a small endemic pelagic cyprinid (Rastrineobola argentea); these three have replaced a multispecies fishery. Contemporaneously the lake is becoming increasingly eutrophic with associated deoxygenation of the bottom waters, thereby reducing fish habitats. Conditions appear to be unstable.

Item Type: Article
Title: The changing ecosystem of Lake Victoria, East Africa
Personal Creator/Author:
Lowe-McConnell, Rosemary
Refereed: No
Journal or Publication Title: Freshwater Forum
Volume: 4
Number: 2
Page Range: pp. 76-89
Date: 1994
ISSN: 0961-4664
Contact Email Address:
Issuing Agency: Freshwater Biological Association
Uncontrolled Keywords: fishery; limnology; lake fisheries; population dynamics; Africa; Lake Victoria; Lates niloticus; Oreochromis niloticus; Rastrineobola argentea
Subjects: Ecology
Item ID: 4546
Depositing User: Hardy B Schwamm
Date Deposited: 15 Nov 2010 17:47
Last Modified: 29 Sep 2011 16:16

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