Mortality of pre‐smolt Atlantic salmon, Salmo salar L., and brown trout, Salmo trutta L., caused by fluctuating water levels in the regulated River Nidelva, central Norway
Identifieur interne : 001B21 ( Main/Exploration ); précédent : 001B20; suivant : 001B22Mortality of pre‐smolt Atlantic salmon, Salmo salar L., and brown trout, Salmo trutta L., caused by fluctuating water levels in the regulated River Nidelva, central Norway
Auteurs : N. A. Hvidsten [Norvège]Source :
- Journal of Fish Biology [ 0022-1112 ] ; 1985-12.
Abstract
The river Nidelva, situated in central Norway, is regulated for production of electricity. Water discharge may vary from 150 to 30 m3 s‐1 over a period of 10 min at the outlet of the power stations. The water level then sinks 50 cm during the next 30 min. The Nidelva produces both salmon and trout. Water fluctuations were found responsible for large losses of O+ salmon and trout. The recruitment of salmon was concluded as satisfactory, while recruitment of trout was reduced as a result of stranding.
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DOI: 10.1111/j.1095-8649.1985.tb03215.x
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