EFFECTS OF HORMONES ON OXYGEN CONSUMPTION IN AN AIR BREATHING MURREL FISH, CHANNA GACHUA

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 whereas in case of testosterone significant increase in aquatic and total O₂ uptake were recorded but slight decrease in aerial O₂ uptake was noticed. The details have been discussed in this paper.

 

Keywords: Channa gachua, oxygen consumption, hormones.