NINA-rapport 646: Laks i framtidens klima (pdf)

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NINA-rapport 646: Laks i framtidens klima (pdf)

NINA Rapport 646

temperatures and discharge. It is uncertain how this will affect the sea-survival, but present

knowledge suggests that timing of migration is important. Shifting migration dates could therefore

potentially have a negative effect on the population given that the match between the river

and sea environment changes.

It is possible that salmon rivers in southern areas not covered by this report could experience

temperatures exceeding upper critical limits with detrimental effects on salmon populations.

Conversely, river environments in northern systems could experience more beneficial temperature

conditions. Potential effects are a shift in distribution, with retraction of the southern distribution

range and expansion in the northern distribution range.

Anders Gravbrøt Finstad, Richard Hedger, Torbjørn Forseth, Ola Ugedal, Line Sundt-Hansen,

Ola H. Diserud, Norwegian Institute for Nature Research, PO Box 5685 Sluppen, 7485 Trondheim;

Bror Jonsson, Norwegian Institute for Nature Resarch, Gaustadalléen 21, 0349 Oslo;

Ånund Sigurd Kvambekk, Ragnar Ekker, Norwegian Water Resources and Energy Directorate,

PO Box 5091 Majorstuen 0301 Oslo.

e-mail: anders.finstad@nina.no

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