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Survival, Growth, and Catchability of Rainbow Trout of Four Strains
Author(s) -
Brauhn James L.,
Kincaid Harold
Publication year - 1982
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8659(1982)2<1:sgacor>2.0.co;2
Subject(s) - rainbow trout , salmo , fishery , hatchery , fishing , biology , strain (injury) , population , fish <actinopterygii> , anatomy , demography , sociology
Fingerling rainbow trout (Salmo gairdneri) of genetically different strains survived, grew, and were caught at different rates by anglers and in gill nets after release from a hatchery into a 1‐hectare pond. When two domestic strains were compared, more fish of the strain genetically selected for fast growth were caught per unit of angling effort than were fish of a strain not selected for this characteristic. When fish of a natural and domestic strain were released together, survival was higher in the natural strain, but growth was slower. Strain population estimates reflected differences in catchability and were erroneous for the strain selected for growth. These observations imply that rainbow trout of different strains vary in their suitability for different fishery management practices.