Preliminary investigations on the predatory potential of three mosquito larvivorous fishes exposed to copper sulphate
1998
Kehar, A.A. | Ahmad, S.S. | Jafri, S.I.H. (Sindh Univ., Jamshoro (Pakistan). Dept. of Zoology)
The effect of copper sulphate solutions was investigated on predatory efficacy of three fresh water fishes of Sindh, Pakistan. Oreochromis mossambicus consumed 87%, 3rd instar larvae of the mosquito, Culex quinquefasciatus in 24 hours in the control group. In solutions of 0.25 mg/l Cu ++ and 0.75 mg/l Cu ++, 71% and 61% larvae were eaten, respectively. Poicelia latipinna consumed 17% and 16% mosquito larvae in copper solutions, compared to 87% in the control group. Notopterus notopterus consumed 100% larvae in control and 90-99% larvae in copper sulfate solutions. The feeding response of these fishes appears to be related to concentration of Cu ++ in water, but species specificity is also evident.
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