Predation on hatchery‐reared and wild smolts of Atlantic salmon, Salmo salar L ., in the estuary of River Orkla, Norway

Predation on wild and hatchery‐reared Atlantic salmon smolts was studied in the estuary of River Orkla. Cod and saithe congregating in the estuary were the most serious predators on smolts. There was no difference between the mortality rates of wild and hatchery‐reared smolts. Predation by cod was e...

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Bibliographic Details
Published in:Journal of Fish Biology
Main Authors: Hvidsten, N. A., Lund, R. A.
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 1988
Subjects:
Aquatic Science
Ecology, Evolution, Behavior and Systematics
Norway
Orkla
Atlantic salmon
Salmo salar
Online Access:http://dx.doi.org/10.1111/j.1095-8649.1988.tb05453.x
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1988.tb05453.x
https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1988.tb05453.x
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Summary:Predation on wild and hatchery‐reared Atlantic salmon smolts was studied in the estuary of River Orkla. Cod and saithe congregating in the estuary were the most serious predators on smolts. There was no difference between the mortality rates of wild and hatchery‐reared smolts. Predation by cod was estimated at 20%. No evidence was found to indicate selective predation on the smallest wild and hatchery‐reared smolts.

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