Document Detail
Biodiversity and Fishery Sustainability in the Lake Victoria Basin: An Unexpected Marriage?
Abstract/OtherAbstract :
Lake Victoria is Africa's single most important source of inland fishery production. After it was initially fished down in the first half of the 20th century, Lake Victoria became home to a series of introduced food fishes, culminating in the eventual demographic dominance of the Nile perch, Lates niloticus. Simultaneously with the changes in fish stocks, Lake Victoria experienced dramatic changes in its ecology. The lake fishery during most of the 20th century was a multispecies fishery resting on a diverse lake ecosystem, in which native food fishes were targeted. The lake ended the century with a much more productive fishery, but one in which three species—two of them introduced—made up the majority of the catch. Although many fish stocks in Lake Victoria had declined before the expansion of the Nile perch population, a dramatic increase in the population size of Nile perch in the 1980s roughly coincided with the drastic decline or disappearance of many indigenous species. Now, two decades after the rise of Nile perch in Lake Victoria, this species has shown signs of being overfished, and some of the native species that were in retreat—or even thought extinct—are now reemerging. Data on the resurgence of the indigenous species suggest that heavy fishing of Nile perch may enhance biodiversity; this has spawned renewed interest in management options that promote both fishery sustainability and biodiversity conservation.
Authors :
JOHN S. BALIRWA, COLIN A. CHAPMAN, LAUREN J. CHAPMAN, IAN G. COWX, KIM GEHEB, LES KAUFMAN, Rosemary H. LOWE-McCONNELL, OLE SEEHAUSEN, JAN H. WANINK, ROBIN L. WELCOMME, FRANS WITTE
Related Documents :
412219 - Movement of walleye in an impounded reach of the au sable river, michigan, usa
4184779 - Report on the detrimental removal of trout food from the streams of kalamazoo and adjac...
2207199 - Food and feeding habits of the catfish, bagrus docmak (forsskal, 1775) (pisces:bagridae...
32429479 - Crayfish in lakes and streams: individual and population responses to predation, produc...
36645819 - Alternate states in a large oligotrophic lake: a retrospective analysis of nutrient loa...
512559 - Biodiversity and fishery sustainability in the lake victoria basin: an unexpected marri...
33207889 - Using neem tree to improve animal health and productivity in the arid and semi-arid lan...
31094709 - Food availability and egg production: a field experiment with hippa pacifica dana (deca...
30045729 - Immunomodulation by probiotics: efficacy and safety evaluation
Contributors :
-
Publication Detail :
Publisher :  American Institute of Biological Sciences     Type :  Text     Format :  text/html    
Date Detail :
2003-08
Subject :
-
Coverage :
-
Relation :
-
Source :
-
Copyright Information :
-
Other Details :
Languages :  en-US    
Export Citation :
APA/MLA Format     Download EndNote     Download BibTex

Previous Document:  The Costs and Effectiveness of Funding the Conservation of Australian Threatened Birds
Next Document:  Boundaries in Miniature: Two Examples from Soil