Monocrotophos induced toxicity and physiological stress on fish Puntius filamentosus. (Val, 1844)

Abstract

The effect of lethal (26.5µl/l) and sub-lethal (2.65µl/l) concentrations of monocrotophos (36% SL) on oxygen consumption and behavior of the fish Puntius filamentosus were studied in the laboratory. The oxygen consumption level was drastically reduced in lethal concentration and no much difference was seen at sub- lethal concentration. Similarly, in lethal concentration, the fish behaved abnormally with abnormal swimming pattern and eventually died. In sub-lethal concentration a little difference was seen in the behavior of the fish for the first 4 days but later on the fish adapted to the surrounding environment. The study reveals that the fish P. filamentosus can adapt to low concentration of monocrotophos toxicity during long-term exposure periods but the increase in concentration is toxic to the fish.