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Annual biomass and production of brook charr ( Salvelinus fontinalis ) introduced into a historically fishless lake
Author(s) -
Kelso J. R. M.,
Shaw M. A.
Publication year - 1995
Publication title -
ecology of freshwater fish
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 55
eISSN - 1600-0633
pISSN - 0906-6691
DOI - 10.1111/j.1600-0633.1995.tb00116.x
Subject(s) - salvelinus , fontinalis , biomass (ecology) , ecology , population , biology , forestry , geography , demography , fish <actinopterygii> , trout , fishery , sociology
Brook charr 15 months old were introduced in 1985 into one of two self‐contained basins of Batchawana Lake, Ontario, Canada, where they survived and reproduced. Population survival rates (ages ≥ 1) remained high (>50%) from 1986 to 1992. Annual growth rates peaked (G x =3.1) the year following their introduction, and remained between 0.8 and 1.6 thereafter. Brook charr biomass (B) was highest, ∼ 55 kg ∼ ha −1 in 1987 and 1990, and production (P) gradually declined from 80–90 in 1986–1987 to ∼ 30 kg‐ha −1 ‐year −1 in 1990–1991. Initial high P:B ratios for brook charr, ∼ 3.0, declined and stabilized to ∼ 1.3 in the third year after introduction.