Bird predation on hatchery reared Atlantic salmon smolts, Salmo salar L., released in the River Eira, Norway

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Published: Dec 31, 1987
DOI: https://doi.org/10.5324/fn.v8i0.6094
Keywords:
Actinopterygii, Salmoniformes, restocking, interspecific dynamic, population dynamic, Western Norway

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Ole Reitan
Directorate for Nature Management, Department of Research, Tungasletta 2, NO-7004 Trondheim. Norway
Nils Arne Hvidsten
Directorate for Nature Management, Department of Research, Tungasletta 2, NO-7004 Trondheim. Norway
Lars P. Hansen
Directorate for Nature Management, Department of Research, Tungasletta 2, NO-7004 Trondheim. Norway

Abstract

Carlin-tagged Atlantic salmon smolts have been released in the River Eira in western Norway during the period 1961 - 1980. Just after release birds were observed as smolt predators. Each year the river bank was searched for tags and pellets containing tags. This recovery rate varied between 0.0 - 10.8% in a total of 46 smolt releases during 20 years. Predation of smolts was positively correlated with the water discharge in the river, and negatively correlated with the recapture rate of adult salmon, accounting for 14% of the variation in adult recapture rates.

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How to Cite
Reitan, O., Hvidsten, N. A., & Hansen, L. P. (1987). Bird predation on hatchery reared Atlantic salmon smolts, Salmo salar L., released in the River Eira, Norway. Fauna Norvegica, 8, 35-38. https://doi.org/10.5324/fn.v8i0.6094
Issue
Vol. 8 (1987)
Section
Articles
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