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RNA‐DNA ratio as an index to growth in salmonid fishes in the laboratory and in streams contaminated by carbaryl
Author(s) -
Wilder I. B.,
Stanley J. G.
Publication year - 1983
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1983.tb04737.x
Subject(s) - salvelinus , salmo , biology , trout , fontinalis , rna , dna , carbaryl , streams , fishery , salmonidae , zoology , ecology , environmental chemistry , fish <actinopterygii> , biochemistry , pesticide , gene , chemistry , computer network , computer science
Free nucleotides, RNA, and DNA were extracted from fish white muscle and analysed by a two‐wavelength ultraviolet (UV) absorbance technique to determine their relation to growth rates in brook trout, Salvelinus fontinalis , and Atlantic salmon, Salmo salar . In the laboratory, fish given ample feed had higher growth rates than fish on restricted rations, and these growth rates were significantly correlated with RNA‐DNA ratios. Wild brook trout from natural streams had higher average RNA‐DNA ratios than those in the laboratory. Exposure of brook trout in one of the streams to low levels of the insecticide carbaryl (Sevin) that drifted from the spraying of nearby forests did not reduce RNA‐DNA ratios.