Analysis for liver mixed function oxygenase in fish : Peace, Athabasca and Slave River basins, September to December, 1994 / prepared for the Northern River Basins Study under project 3144-D2 by W. Lyle...: R71-49/3-132E-PDF

"Collections of fish were made at locations throughout the Peace, Athabasca and Slave River drainage basins in 1994 with a view to determining whether the effects of pulp mills could be detected in the fish. Previous studies had indicated that biochemical effects could be detected in fish from the Wapiti River near Grande Prairie and from the Athabasca River near Hinton. Four species of fish were collected, namely burbot {Lota lota), flathead chub (Platygobio gracilis), longnose sucker (Catostomus catostomus) and northern pike (Esox lucius). Collections were found to contain mature males, mature females and immature fish and it was generally necessary for statistical reasons to consider these gender/maturity classes separately, although numbers of fish in each class were often small. The fish were analyzed for mixed-function oxygenase (MFO) activities in microsomes prepared from livers. These enzymes have been found to respond to pulp mill effluents in populations of fish sampled near other pulp mill locations in Canada and Europe"--Report summary.

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