Movement and mortality of stocked brown trout in a stream

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The movement and mortality of stocked brown trout Salmo trutta were investigated using radio telemetry. Four brown trout left the study area whereas the remaining fish were stationary. After 5 weeks, 13 out of 50 tagged brown trout were still alive in the stream. Surviving fish had a significantly lower mean movement per day than fish, which later either died or disappeared. This difference in behaviour was most pronounced 2 to 8 days after release. Predation by the otter Lutra lutra was probably the main cause of the observed mortality. (c) 2005 The Fisheries Society of the British Isles
Original languageEnglish
JournalJournal of Fish Biology
Issue number3
Pages (from-to)721-728
Publication statusPublished - 2005


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