Lake survival of hatchery and pre‐stocked pond brown trout,Salmo truttaL.

摘要

Abstract.A comparison was made of lake survival, after 2 years, of hatchery and pre‐stocked pond brown trout, Salmo trutta L., (age 0+) in two small mountain lakes in south‐central Norway, one which contained a resident population of brown trout. There was a significantly higher recapture of pond fish in both lakes. The mortality rate for the stocked fish was significantly higher in the lake which contained a resident population of brown trout. The competitiveness of the stocked fish is discussed in relation to foraging success, predation and str