Qaisur Rahman & D. N. Sadhu*
Department of Zoology, St. Columba’s College, Hazaribag, Jharkhand, India, Pin – 825301
Received 28th November, 2009; Revised 5th February, 2010
Abstract : In the present investigation an attempt has been made to study the effects of hormones on dual mode of O2 consumption in an air breathing murrel fish, Channa gachua. The mean value of aquatic, aerial and total O2 consumption of control fishes were recorded as 52.44, 61.56 and 114.0 (ml/kg/hr) respectively. The treatment of Hydrocortisone and Thyroxine in Channa gachua brought significant increase in aquatic aerial and total O2 uptake where as Adrenaline caused slight decrease in aquatic but abrupt and significant fall in aerial and total O2 consumption. The treatment of Progesterone affected significant increase in aquatic and decrease in aerial and total O2 uptake where as in case of Testosterone significant increase in aquatic and total O2 uptake where recorded but slight decrease in aerial O2 uptake was noticed. The details have been discussed in this paper.