Induction of Various Diseases in Clarias batrachus (Linnaeus, 1758) Following Exposure to Cypermethrin and Fenvalerate, with Reference to Histopathological and Physiological Alterations

Catfishes Clarias batrachus (Linnaeus, 1758), exposed under the Acute toxicity at the lethal concentration dose of LC50 1⁄4 of 1 μg/ litre for 24 hours; which is 0.25 μg/litre for Cypermethrin. On the other hand, lethal concentration of Fenvalerate for 24 hours was LC 50 (250μg/litre) selected by its 1/10 portion which is LC50 (25 μg/ litre) for the test dose. Generation of different types of diseases observed during the period of research study. These concentrations were maintained throughout the study, with observations made at 24-hour intervals to assess acute toxicity at lethal concentrations.