Cladocera of coastal rivers of western Nigeria |
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Authors: | Austin B M Egborge Egborge Onwudinjo P C Chigbu |
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Institution: | (1) Department of Zoology, University of Benin, Benin City, Nigeria;(2) School of Fisheries, University of Washington, 98195 Seattle, WA, USA |
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Abstract: | Recent studies indicate that there are at least 100 species of Cladocera in the families Bosminidae, Chydoridae, Daphnidae, Macrothricidae, Moinidae and Sididae in the inland waters of Nigeria. Over 50% of these have been found in net plankton samples from the coastal rivers in addition to Evadne tergestina Claus (Family: Podonidae), and Daphnia barbata Weltner, hitherto unreported in the equatorial lowlands of Africa. In effect, the Cladocera of the coastal rivers and creeks consist of the marine/brackish assemblage made up of Penilia avirostris Dana and Evadne tergestina and the freshwater assemblage made up of all other Cladocera found. Unlike in the more inland water bodies, the freshwater assemblage of the coastal rivers is dominated by the Bosminids Bosmina longirostris (O. F. Muller) and Bosminopsis deitersi Richard. The distribution, seasonality and successional patterns of Cladocera in the coastal water bodies of Western Nigeria is presented. |
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Keywords: | Anastomosing estuaries cladoceran distribution assemblages |
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