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Effect of increased flow on the behaviour of Atlantic salmon parr in winter

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The effect of increased flow on movement and microhabitat use of Atlantic salmon Salmo salar parr in winter was investigated using radiotelemetry. To simulate hydropeaking operations, flow was increased four‐fold from 1·3 m3 s−1 to 5·2 m3 s−1 for 24 h periods. Flow did not affect fish habitat use or displacement and had little effect on fish activity within diel periods. During high flow periods in late winter, fish reduced night‐time activity. Stranding rates during flow reduction were also very low (only one fish).
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Keywords: Atlantic salmon; flow; hydropeaking; movement; radiotelemetry; winter

Document Type: Regular Paper

Affiliations: 1: Cognitive and Behavioural Ecology, Memorial University of Newfoundland, St John’s, Newfoundland and Labrador, A1C 5S7, Canada, 2: Department of Fisheries and Oceans, Box 5667, St John’s, Newfoundland and Labrador, A1C 5X1, Canada and 3: Canadian Wildlife Service, 6 Bruce Street, Mount Pearl, Newfoundland and Labrador, A1N 4T3, Canada

Publication date: 2004-10-01

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