Respiratory Responses Of Indian Major Carp Catla Catla (Hamilton) During Thermal-Stress And Thermal-Adaptation

The two vital respiratory parameters namely Oxygen consumption of the whole fish and Opercular activity in Indian Major Carp was investigated during thermal-stress Thermal-adaptation. major carp Catla catla subjected to Slow temperature change from 22 ⁰c 32⁰c (heat-adaptation) (cold -adaptation) at rate 1⁰c ̷ 60 hours showed a gradual stepping-up oxygen opercular heat-adaptation stepping-down case cold-adaptation both cases reached control values within 35 days, where as exposed abruptly (heat-stress) -stress) hour exhibited neither nor they could not reach days. Stress is physiological load acted upon fish, adaptation slow process compensation without