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Some Factors Influencing Susceptibility of Rainbow Trout to the Acute Toxicity of an Ethyl Mercury Phosphate Formulation (Timsan)
Author(s) -
Amend Donald F.,
Yasutake William T.,
Morgan Reginald
Publication year - 1969
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(1969)98[419:sfisor]2.0.co;2
Subject(s) - rainbow trout , chemistry , mercury (programming language) , salmo , chloride , phosphate , oxygen , toxicity , calcium , acute toxicity , environmental chemistry , respiration , hard water , inorganic chemistry , fish <actinopterygii> , fishery , biochemistry , organic chemistry , biology , anatomy , computer science , programming language
This study determined the influence of water temperature (55–68° F), dissolved oxygen (4–12 ppm), water hardness as CaCO 3 (20–256 ppm), and chloride ions (to 2 mM) on the susceptibility of rainbow trout (Salmo gairdneri) to the acute toxicity of ethyl mercury phosphate (EMP). The fish were exposed for one hour to 0.125 ppm EMP, the active ingredient of Timsan, a commercial EMP formulation. The death rate because of the exposure to EMP increased with an increase in water temperature, a decrease in dissolved oxygen, and an increase in chloride ions; calcium appeared to have no effect. The effect of water temperature and dissolved oxygen was ascribed to changes in the respiration rate of the fish, and a chemical explanation is presented for the effect of chloride ions.