Production at a fish hatchery was restricted to protect the purity of a valuable trout stock in a Finnish river.

The Administrative Court upheld the restriction on production at a fish hatchery located in a tributary of the Isojoki River. The court found that limiting output was necessary to safeguard the purity of the valuable juvenile trout population and prevent the spread of fish diseases. Consequently, the decision to restrict the hatchery's operations was deemed legally sound and in the public interest.