An internationally-renowned biologist describes the life history of the Atlantic salmon in light of intensive research over the last 30 years. Provides an authoritative and detailed appraisal of the fisheries that exploit this valuable resource. The salmon's conflict with the environment is examined in the context of changes in land use, water abstraction and acidification. A complete analysis of the author's North Esk investigation is given and the effects of fish farming on wild stocks and the salmon's future are discussed.