Recaptures and resource use of native and non-native brown trout, Salmo trutta L., released in a Norwegian lake

摘要: Rate of recapture (gill netting), habitat use, and diet three strains stocked brown trout, Salmo trutta L., were compared with resident trout in a Norwegian lake. The originated from an alpine lake, boreal the native population Overall rate was 5–8% for all strains. low could be due to relatively small size at stocking; mean fish length varied between 13.1 14.5 cm strain stocking method. Two years after release, frequency different decreased about 12% first year stabilize 1%. showed highest overall rate, whereas recaptured intermediate rate. scatter-planted higher than that spot-planted trout. Immediately being stocked, introduced ate less had less-varied trout; however, adopted natural within summer. distribution pelagic upper epibenthic similar both Results indicate use is adaptive becomes indigenous fish.