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Comparative sublethal Effects of Actellic 25EC and Gammalin super on Tissue Alkaline Phosphatase activity in the catfish Clarias albopunctatus (Lamonte and Nichole 1927)

One hundred and fifty adult Clarias albopunctatus were subjected to sublethal concentrations of Gammalin super and actellic 25EC (0,0.5, and 1.0 µg/L) in a static bioassay renewal system for 14 days. Changes in the activities of liver and bone alkaline phosphatase (ALP) were studied during the period of exposure. The results showed that exposure of C. albopunctatus to the two pesticides evoked significant and varying increases in both the liver and bone ALP activities. The observed increases in alkaline phosphatase activities were concentration-and duration of exposure-dependent. Compared with the controls, ALP activities were significantly (P < 0.05) higher in the treatment groups and also in C. albopunctatus treated with gammalin super than in the fish exposed to equivalent concentrations of actellic 25EC. The results suggest that both pesticides had adverse effect on the physiology of the experimental fish

Ivoke, N. and Ukwuani, O. T. Department of Zoology, University of Nigeria, Nsukka, Enugu State, Nigeria

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