Three cases of fungal infestation on grayling in Långåljusnan have been reported. The causes have not been determined, but they may have been caused by re-released fish being injured or possibly by injuries that occurred during spawning and which then led to fungal growth.

The fungus takes root in areas where the skin is damaged and then grows over the fish. Stress in various forms increases the risk of attack. Hormonal adjustment before play, play hiking, fights and play activities can all contribute to mushrooms taking root now that the grayling are playing in the spring.

Catch & Release can be one of the explanations if the fish are handled carelessly by someone who does not know the art and understands how sensitive it is.

The Basic Rules of Catch & Release is that you avoid teasing the fish, catches it in the net without lifting it out of the water, Carefully remove the barbed hook and allow the fish to swim out again. It is possible to temporarily lift the net for photography. Use your eye size to determine the length. Fish must never be touched by dry hands. Hand hygiene and wet hands are a must.

Caught fish with white fungal infestation should always be picked up and never re-released regardless of size. Severely infested fish die while minor infestations can heal.

Freshwater fungi are found naturally in our waters, but the extent of the attacks varies greatly between different years. The occurrence of fungal infestations in Långåfisket's waters is relatively rare. Hot summers with high water temperatures and low flows lead to greater stress with greater stress, poorer growth and fitness along with a weakened immune system.

Report any findings and observations to info@langafisket.se