Toxic effect of mardo on bimodal oxygen uptake in a fresh water fish, Labeo rohita (Ham.)

Sudama Kumar^a*, Surabhi Saloni^a & Lakshman Sah^b
aDepartment of Zoology, M.G. College, Bodh-Gaya, Bihar, India
^bDepartment of Zoology, R.K.D College Patna, Patliputra University, Patna, Bihar, India
Received : 21st January, 2021 ; Revised : 21st February, 2021

Abstract– The toxic effect of Mardo (profenofos i.e, pesticide) on bimodal oxygen uptake in a fresh water carps fish Labeo rohita (Ham.). The LC50 Values of profenofos (Mardo) were calculated to be 0.450, 0.420, 0.300 and 0.270 mg/L for 24 hrs, 48 hrs, 72 hrs and 96 hrs respectively exposure at 30.0 + 1.0oC . Control group of fishes (35.0 + 1.5g secures 52.480 + 1.72 cc/kg/hr. from gills and 2.810 + 0.32 where as from skin through aerial route i.e, total 55.250 + 1.25 cc/kg/hr Mardo (Profenofos) intoxication (at sub lethal concentrations of 0.20, 0.31 and 0.250 mg/L in Labeo rohita caused Significant decrease in aquatic respiration through gills and total oxygen uptake but significant increase in aerial oxygen uptake through skin as compared to control.

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