The toxic effects of phorate exposed for ten minutes before fertilization on sperm cell of sedentary polychaete Hydroides elegans (Haswell, 1883)
S. Vijayaragavan*
Indira Gandhi National Open University, Regional Centre, Cochin-682017 (India) Email: vijayaraja100@gmail.com *Correspondence Author: Dr.S.Vijayaragavan Assistant Regional Director, Indira Gandhi National Open University, Regional Centre, Cochin-682017 (India) Email: vijayaraja100@gmail.com
ABSTRACT
The toxicity test has been developed to examine the effects of pesticides on fertilization and early development of marine Polychaete Hydroides elegans (H. elegans). The Pesticides lead to pollution of the ground water, soil, aquatic environments and also marine environment. It directly enters the food chains of the organisms and it affects the marine ecosystems. The pesticides alter the regular functions of the marine organisms as well as nervous system and physiological structure. The toxic effect of phorate on sperm cell of H. elegans was examined and it was found that the rate of successful development of embryonic development decreased when the concentration of phorate increased in sea water. The results presents here, strongly suggest that the mechanism of action of the phorate probably acts on sever as intracellular targets based on EC50 values of the present study; It indicated that phorate was toxic to the early developmental stages of H. elegans when the sperm were already exposed to the same concentration of phorate for ten minutes before fertilization. The results indicate that the sperm and early development stages of H. elegans are sensitive and toxic to phorate when the sperm were already exposed to the phorate before fertilization. The sedentary polychaete, Hydroides elegans can be routinely used as a test organism for eco-toxicity bioassays experiments at tropical and sub tropical regions.