Effects of Carlin tagging and fin clipping on survival of Atlantic salmon (Salmo salar L.) released as smolts |
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Authors: | Lars P Hansen |
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Institution: | Directorate for Nature Management, Fish Research Division, Tungasletta 2, N-7047, Trondheim, Norway |
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Abstract: | During the period 1976–1979, in total 2567 wild migrating smolts of Atlantic salmon were Carlin-tagged, 2528 were adipose fin-clipped and 2309 individuals were released unmarked into the River Imsa, S.W. Norway. The smolts were caught in a permanent Wolf trap. The adult return rate to the river was highest for unmarked and lowest for Carlin-tagged fish. The main reason for this is probably a mortality of smolts due to handling, anaesthesia and tagging. |
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