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Lake survival of hatchery and pre‐stocked pond brown trout, Salmo trutta L.
Author(s) -
HESTHAGEN T.,
JOHNSEN B. O.
Publication year - 1989
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1989.tb00444.x
Subject(s) - brown trout , salmo , biology , fishery , hatchery , trout , stocking , population , predation , fish <actinopterygii> , catch and release , ecology , demography , recreational fishing , sociology
. 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 stress.