Comp Biochem Physiol C. 1991;100(1-2):107-10.

Pesticides induced changes in circulating thyroid hormones in the freshwater catfish Clarias batrachus.

Source

Fish Endocrinology Laboratory, Banaras Hindu University, Varanasi, India.

Abstract

1. Effects of endosulfan, malathion and carbaryl on circulating T4, T3 and T3/T4 ratio in the freshwater catfish, C. batrachus have been studied during reproductively active phases, i.e. vitellogenic and post-vitellogenic phases of its annual reproductive cycle. 2. Endosulfan provoked a significant increase in T4 and a decrease in T3 as well as the T3/T4 ratio. 3. Malathion decreased T3 and T3/T4 ratio without altering the level of T4 in circulation. 4. Carbaryl caused a decline in the level of T4 and an elevation in T3 and T3/T4 ratio.

PMID:: 1677838; [PubMed - indexed for MEDLINE]

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