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Enriched rearing improved survival
The migration and survival of radio tagged salmon smolts was monitored with automatic listening stations and by manual tracking using a boat along a 290 km migration route in River Tornionjoki. Enriched rearing improved the survival of hatchery fish compared to fish reared in normal tanks but wild smolts still had the highest survival rates. Read more
Regulated Rivers Research
Finland has about 159 000 kilometers of rivers, of which more than 90 % are regulated or otherwise modified. Thus, changes of these river systems must be taken into account in the management of riverine fish populations. Read more
Combining harvesting and conservation: the case of adfluvial brown trout populations
Finnish adfluvial brown trout stocks are endangered. One of the most viable populations lives in the Oulankajoki river system, Northern Finland - a joint water course between Finland and Russia. The ongoing research project is attempting to develop joint management and conservation actions between Finland and Russia to assure the wellbeing of these unique brown trout stocks. Read more

Publications

23.09.2017

Synchronous decline of three morphologically distinct whitefish (Coregonus lavaretus) stocks in Lake Oulujärvi with concurrent changes in the fish community

Synchronous decline of three morphologically distinct whitefish (Coregonus lavaretus) stocks in Lake Oulujärvi with concurrent changes in the fish community

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09.05.2017

Model-based evaluation of the management of pikeperch (Sander lucioperca) stocks using minimum and maximum size limits

Model-based evaluation of the management of pikeperch (Sander lucioperca) stocks using minimum and maximum size limits

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30.09.2016

Growth, survival and interspecific social learning in the first hatchery generation of Eurasian perch (Perca fluviatilis)

Growth, survival and interspecific social learning in the first hatchery generation of Eurasian perch (Perca fluviatilis)

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30.09.2016

Long-term monitoring reveals the success of salmonid habitat restoration

Long-term monitoring reveals the success of salmonid habitat restoration

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30.09.2016

Effects of tagging on migration behaviour, survival and growth of hatchery-reared Atlantic salmon

Effects of tagging on migration behaviour, survival and growth of hatchery-reared Atlantic salmon smolts

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