The effects of sublethal concentrations of five organophosphorus insecticides on temperature tolerance, reflexes, and orientation in Gambusia affinis affinis (Pisces: Poeciliidae) |
| |
Authors: | CLIFFORD RAY JOHNSON |
| |
Institution: | Division of Biological Control, University of California, Berkeley, 1050 San Pablo Avenue, California 94706, U.S.A |
| |
Abstract: | Gambusia affinis were exposed to the insecticides ABATE®, fenthion, chlorpyrifos, methyl parathion, and malathion for 24 h at concentrations of 1, 5, and 10 ppb and for 48 h at 5 ppb. The thermal tolerance was lowered significantly for male and female G. affinis by the toxicants methyl parathion and chlorpyrifos at 5 and 10 ppb with 24 h exposure. Activity was restricted with fish exposed to methyl parathion and chlorpyrifos at concentrations of 10 ppb for 24 h and at 5 ppb for 48 h. |
| |
Keywords: | thermal tolerance organophosphorous insecticides fish Gambusia affinis |
|
|