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The Effect of Cresol on Brook Trout, Salvelinus Fontinalis
Author(s) -
Embody Daniel R.,
Schuck H. A.,
Lee Crump S.,
Freese J. W.,
Ross Lionel
Publication year - 1941
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(1940)70[304:teocob]2.0.co;2
Subject(s) - salvelinus , trout , fontinalis , cresol , toxicity , fish <actinopterygii> , rainbow trout , chemistry , biology , fishery , zoology , ecology , toxicology , phenol , organic chemistry
In order to increase the effectiveness of the cresol method of estimating fish populations, a series of experiments were performed to determine the toxicity of cresol in relation to the size of the fish, the concentration of the cresol, and the temperature of the solution. The mean turn‐over time was used as a measure of the toxicity. From the experimental evidence obtained, it was concluded that the toxicity of cresol is approximately the same for brook trout from 8 to 14 centimeters long. The concentration and the temperature are very important factors affecting the toxicity of cresol. The relation can be expressed by this equation 1/t = 0.5356 log C + 0.005827 T − 0.1274 where “t” = the mean turn‐over time, “C” = the concentration of cresol in per cent by volume times one thousand, and “T” = the temperature, ° C. Cresol, if used carefully, does not visibly injure brook trout.