Survival of Cyclops abyssorum tatricus (Copepoda, Crustacea) in alpine lakes stocked with planktivorous fish1

Results of field sampling and experiments suggest a strategy enabling Cyclops abyssorum tatricus to be the sole crustacean survivor in alpine lakes stocked with brook char. Reproductive pattern and population spatial distribution, egg resistance to char digestive enzymes, as well as the absence of cladocerans which would otherwise compete with Cyclops nauplii for scarce food resources, all ensure the survival of this planktonic crustacean.