• RAJASEKARAN, G
• RENGARAJAN, R
• KUMARASAMY, P

Abstract : The toxic effect of pesticide cypermetherin on serum cortisol activity of Labeo rohita was studied. The fish were exposed for 24, 48, 72 and 96 h in 10 % and 20 % sublethal concentration of 96 h Lc50 of cypermetherin (0.057 ppm). Exposure of fishes to 10% and 20 % sublethal concentration of cypermetherin caused several changes in the serum cortisol activity. Highest activity was observed in the fish exposed to 20% sub lethal concentration during 24 h. In the present investigation an eloquent raise in serum cortisol level was witnessed in the fish exposed to 20% sublethal concentration of cypermetherin. The elevated level of cortisol in the serum activities the target tissue to produce a burst of energy to prepare the fish for an emergency situation or may be for immune repression.

Fish, Cypermetherin, Serum cortisol, Labeo rohita.

"EFFECT OF CYPERMETHERIN ON SERUM CORTISOL ACTIVITY IN THE FRESHWATER FISH LABEO ROHITA ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.156-161, June-2019, Available :http://www.jetir.org/papers/JETIR1906458.pdf

"EFFECT OF CYPERMETHERIN ON SERUM CORTISOL ACTIVITY IN THE FRESHWATER FISH LABEO ROHITA ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp156-161, June-2019, Available at : http://www.jetir.org/papers/JETIR1906458.pdf