Pesticides induced changes in circulating thyroid hormones in the freshwater catfish Clarias batrachus. |
| |
| Authors: | N Sinha B Lal T P Singh |
| |
| Affiliation: | 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. |
| |
| Keywords: | |
|
|
