| Summary: | Flow alterations related to hydroelectric development have affected both the fish stocks and the Cree Indian subsistence fishery in the lower LaGrande River, northern Quebec. Evaluated against several years of baseline data, the initial biological impact of the project on fish populations, mostly whitefish (Coregonus clupeaformis) and cisco (C. artedii) appeared to be relatively small. Nevertheless, fishing activity in the lower river and the estuary largely ceased from 1979 to 1981, due to physical modifications of traditional fishing areas and other social and economic effects related to the hydro project. Some fishermen modified their methods and continued harvesting in the affected area, but others abandoned the affected area and fished lakes and rivers along the recently constructed road network. It is concluded that earlier impact assessments fell short of predicting these impacts.Key words: environmental impact, social impact, hydroelectric projects, northern development, James Bay, northern Quebec, subsistence fisheries, native harvesting, Coregonus clupeaformis, Coregonus artedii Mots clés: impact environnemental, impact social, projets hydroélectriques, développement du nord, Baie James, nord québécois, pêcheries de subsistence, récolte autochtone, Coregonus clupeaformis, Coregonus artedii
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