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The influence of river flow on pelagic sardine catches in Lake Kariba
Author(s) -
Marshall B. E.
Publication year - 1982
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1982.tb03939.x
Subject(s) - tributary , sardine , pelagic zone , fishery , biology , nutrient , hydrology (agriculture) , fish <actinopterygii> , ecology , geography , geology , cartography , geotechnical engineering
The nutrient level of Lake Kariba is governed by the Zambezi river which provides about 70% of its water supply. Other tributaries are richer in nutrients and have an appreciable local effect. This is shown by the catches of Limnothrissa miodon which increase after strong flows in the Sanyati river. This is in contrast to natural lakes such as Lake Tanganyika and may be an important management factor in Lake Kariba and other man‐made lakes. Possible periods of poor rainfall could thus reduce the Limnothrissa yield in Lake Kariba.