Antigonon leptopus Hook. & Arn.- a new plant origin icthyotoxicant on Channa punctata (Bloch, 1793) for aquaculture management

The present study was conducted to develop an ecofriendly and effective organo-piscicide. Here piscicidal effect of locally available plant Antigonon leptopus (Hook. and Arn.) Against common freshwater air breathing predatory fish Chana punctatus (Bloch,1793)and their behavioral changes were investigated. The test fish was exposed to five different concentrations of fresh leaves aqueous extract (10,20, …50ppm) for toxicity test remaining one a control. Attempts had been made to access the impact of 24h LC₁₀₀of the aqueous extract of A. leptopus leaves on the test fish Chana punctatus. To determine the LC₁₀₀ of the leaf extracts, relationship between observed and expected rate of mortalities of the test fish and dose-mortality relationships, Chi-square and ANOVA tests were done. This study indicates that the leaf extract of the plant species may be used as potential organo-piscicide to remove the unwanted weed fish species from the fish culture ponds as an environmentally safe and effective phyto-piscicide necessary for aquaculture management.