Insecticide Susceptibility of Some Common Fish Family Representatives

TLDR: Susceptibility to the insecticides was, in general, similar within systematic groups, with the Ictaluridae and Cyprinidaebeing the least susceptible and the Salmonidae being the most susceptible of the families tested.

Abstract: Static acute bioassays were conducted to determine the relative susceptibility to insecticides of representatives of the families Ictaluridae, Cyprinidae, Centrarchidae, and Salmonidae. TL50 values were predicted for twelve species of fish tested against nine insecticides. Species differences in susceptibility to the organochlorine insecticides DDT, toxaphene and lindane, and the phosphorothionate organophosphorus insecticides Bayrex(R) and methyl parathion were minimal. Relatively large differences in species susceptibility to the organophosphorus insecticides of the phosphorodithioate group (malathion and Guthion(R) were observed. Species differences in susceptibility to the carbamate insecticides, carbaryl and Zectran, were apparent. Susceptibility to the insecticides was, in general, similar within systematic groups, with the Ictaluridae and Cyprinidae being the least susceptible and the Salmonidae being the most susceptible of the families tested.