Seasonal Variation in Fish Distribution, Abundance and Physico-Chemical Parameters of Wetland Areas in Oyo State, Nigeria.
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Date
2009
Authors
Ayoola, S. O.
Ajani, E.K
Journal Title
Journal ISSN
Volume Title
Publisher
International Formulae Group
Abstract
A study was conducted to assess the physico-chemical characteristics and fish distribution of wetland areas of Oyo State. The results revealed incidence of pollution as a result of agricultural pollution mainly due to use of agrochemicals. The water pH, Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) were below the World Health Organization (WHO) and FEPA permissible limit in all the locations with the exception of Ajinapa where 5.0, 226.8 mg/l and 372.6 mg/l were recorded for pH, BOD and COD respectively. The level of agrochemical usage varied significantly (p < 0.05) among the locations examined with Ajinapa (Orire LGA) having the highest rate (65.0%) while papa-Eleye (Oluyole L.G.A) had the lowest (15.0%). A total of 16988 individuals, 11 fish species belonging to 7 families were found in 11 locations with Oreochromis niloticus (30.6%) and Clarias gariepinus (20.8%) dominating the catches. From the result, it is clear that high level of pollution in Ajinapa (Orire LGA) location is traceable to the use of agrochemical and
therefore there is a need to take appropriate measure to preserve the aquatic life.
Description
Staff publications
Keywords
Water pollution, wetland, fish biodiversity, Agrochemicals , Water pollution , Wetland , Fish biodiversity , Agrochemicals , Research Subject Categories::NATURAL SCIENCES
Citation
Ayoola, S.O. and Ajani, E.K. (2009). Seasonal Variation in Fish Distribution, Abundance and Physico-Chemical Parameters of Wetland Areas in Oyo State, Nigeria. International Journal of Biological and chemical Sciences. Vol.3(1)107-116.