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THE TROUT AND OTHER MEMBERS OF THE SALMON
THE ATLANTIC SALMON
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adult salmon algae anglers annual aquatic Arctic char Atlantic salmon autumn average Baltic biological Board bottom fauna brown trout Canada catch caught char coast cyprinids density disease downstream drift nets effect effluent eggs Elson estuary factors feeding fertilisation fishery flow gill gravel grayling Greenland grilse growth rate habitat hatchery hydro-electric hypolimnion increase infected Ireland kelts lake land large numbers length Loch methods migration mortality North Norway number of fish occur organic parasites pink salmon plants Plate pollution pond pools population predation production Pyefinch rainbow trout recaptured Research reservoir result River Authority river system salmon and trout salmon fisheries salmon fishing salmon parr salmonids sample scale Scotland Scottish salmon screens sea trout season sewage smolts spawners spawning species stage stream summer survival Sweden Table tagged trap Tweed ulcerative dermal necrosis upstream water temperature weight young salmon