Seasonal Effects of Bleached Kraft Mill Effluent on Reproductive Parameters of White Sucker (Catostomus commersoni) Populations of the St. Maurice River, Quebec, Canada

Reproductive parameters and accumulation of chlorophenolic compounds by white sucker (Catostomus commersoni) populations exposed to bleached kraft mill effluent (BKME) were studied in the St. Maurice River, Quebec. Compared with unexposed populations from the same waterway, exposed white sucker showed obvious effects of chemical exposure as far as 100 km downstream of the mill, as revealed by a strong induction of ethoxyresorufin O-deethylase …