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Survival of Seven‐ to Ten‐inch Planted Trout in Two Minnesota Streams
Author(s) -
Smith Lloyd L.,
Smith Beatrice S.
Publication year - 1945
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1943)73[108:sosttp]2.0.co;2
Subject(s) - trout , brown trout , fishery , fish <actinopterygii> , streams , zoology , biology , spring (device) , salvelinus , sowing , agronomy , mechanical engineering , computer network , computer science , engineering
Jaw‐tagged 7‐ to 10‐inch brook trout and brown trout were placed in two Minnesota streams to determine their survival. A creel census conducted on Duschee Creek showed that trout were returned at the rate of 1.49 and 1.55 fish per hour in succeeding seasons. Brown trout planted in this stream in the fall and spring yielded returns of 21.7 per cent and 28.0 per cent respectively, but no brook trout and only 2.0 per cent of the brown trout planted in summer were caught the following year. Planted trout contributed 8.8 per cent and 22.7 per cent of the total catch in successive seasons. Catchable‐sized brown trout and brook trout planted in the Knife River in the fall and in the spring showed a total return of 1.9 per cent from fall planting and 14.1 per cent from spring planting. Two and four‐tenths per cent of the brook trout and 1.4 per cent of the Brown trout planted in the fall and 19.6 per cent of the brook trout and 8.6 per cent of the brown trout planted in the spring were recaptured. The contribution of planted fish to the total catch in the Knife River was 23.0 per cent. The studies indicated that in the streams studied fall‐planted brown trout may have survival comparable to that of spring‐planted fish, that the majority of planted fish recovered are taken the first 3 to 4 weeks of the season, and that planted fish contribute only a minor portion of the total catch.