The Fisheries Management of the Lake Annecy Stocked Arctic char

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Abstract

The fisheries management of the Lake Annecy stocked Arctic char Salvelinus alpinus fingerlings from different origins to improve the its catches.Different origions of stocked fish includes included catching progeny of wild spawning Arctic char from Lake Annecy and rearing the juveniles in the hatchery at Lake Annecy,, juveniles produced in a hatchery on Lake Geneva from eggs from wild fish in Lake Geneva, or using juveniles of a brood stock reared in the INRA research hatchery on Lake Geneva. The effectiveness of stocking, growth and dispersal after release of fingerlings of Arctic char from these different origins were studied for the fish stocked in 1997. Another experiment was start in 2001, to confirm the previous results on effectiveness and growth. The growth of wild Arctic char were not very much different from hatchery reared stock. The portion of wild fish in the catches is 50%. Juveniles produced from INRA captive brood stock were found more effective in the catch and also showed wider dispersal after stocking. Mean effectiveness of stocking is 14 %.

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