The trout is protected in the streams and must be released back. A maximum of 2 graylings per day and fishermen may be taken. The size of the greyhound must be 35 to 40 cm for it to be permitted to pick it up. Other species have no restrictions. Worms and shrimp are prohibited in the stream system and are only used in the lakes. The grayling only becomes mature when it reaches 35cm. Graylings over 40cm are valuable breeding fish and should therefore not be taken.