Finfish and shellfish composition in old and new Owena reservoirs
Finfish and shellfish fauna composition of the old Owena reservoir, established over 46 years old for drinking and domestic use in Akure metropolis, Ondo town and other villages were re-examined in 2008/2009 to assess long-term changes in relation to activities in the catchment which have included, another new reservoir constructed up stream in 2006. The pre-stocking assessment of the fauna of the newly constructed reservoir was determined. The degree of change between years in total abundance, numbers of taxa and community composition varied considerably between the two sites. These observed differences may be related to increased flora cover in the well established old reservoir, while the new reservoir is still empty with only tilapia as the predominant fish without established aquatic plants. Only one species of fresh water gastropod was found and identified in the new reservoir, while two species of gastropods and one bivalve were identified in the old reservoir. They were found in abundance within their standard length size range of OA2. - 12.5cm. A positive correlation (R2=0.9227) was obtained for samples collected from the' old reservoir, those from the new reservoir gave a contrasting value (R2=0.20 1).
| Main Authors: | , , , , , |
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| Format: | conference_item biblioteca |
| Language: | English |
| Published: |
FISON
2009
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| Subjects: | Biology, Fisheries, Nigeria, Owena Reservoir, freshwater environment, Finfish fisheries, Shellfish fisheries, Check lists, Species diversity, |
| Online Access: | http://hdl.handle.net/1834/38076 |
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