| Lisätietoa: | Human activities have a major impact on river ecosystems worldwide. To
compensate for the loss of natural habitats, massive stocking programs have been
built to maintain fish stocks. The lack of natural reproduction and natural selection
have led into another increasing threat to our fish stocks: domestication. Considering
the ecological and economic value of brown trout as well as the other salmonid
stocks, there is an urgent need for better fisheries management and research for
fisheries-induced evolution, but also for study of behavioural conservation. Indeed,
behaviour has been a long-neglected trait that can have direct effects on individual
survival and fitness. While stocking programs have focused on numbers of stocked
individuals, and maintenance of genetic diversity, the local adaptations and
behavioural diversity have not been among main interests. This has led to
domestication and low stocking success making the expensive stocking programs
ineffectual |
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