Methoxychlor and estradiol-17β affect alevin rainbow trout (Oncorhynchus mykiss) mortality, growth, and pigmentation

Alevin rainbow trout, Oncorhynchus mykiss, were exposed to varying concentrations of methoxychlor and estradiol-17 beta , and effects on mortality, growth, and pigmentation were determined. The embryos were exposed to the chemicals for 2-h periods every third day for a total of ten treatments. Resul...

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Published inBulletin of environmental contamination and toxicology Vol. 61; no. 4; pp. 519 - 526
Main Authors KRISFALUSI, M, EROSCHENKO, V. P, CLOUD, J. G
Format Journal Article
LanguageEnglish
Published New York, NY Springer-Verlag 01.10.1998
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Summary:Alevin rainbow trout, Oncorhynchus mykiss, were exposed to varying concentrations of methoxychlor and estradiol-17 beta , and effects on mortality, growth, and pigmentation were determined. The embryos were exposed to the chemicals for 2-h periods every third day for a total of ten treatments. Results showed that exposure to methoxychlor increased trout mortality in a dose-dependent manner, but trout exposed to estradiol-17 beta exhibited significantly higher mortality. At 24 d post-hatch, the groups treated with either compound weighed less than controls, but in the methoxychlor-treated fish, this correlation was negative, while in the estradiol-17 beta -treated fish it was not. By day 6 post-hatch, the skin of the methoxychlor-treated fish was lighter in color than controls, whereas that of the estradiol-17 beta -treated fish was darker than controls. This alteration in pigmentation was only temporary, however.
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ISSN:0007-4861
1432-0800
DOI:10.1007/s001289900793