In the present work an attempt has been made to study the statistical relationship between dry weight gain (g) and protein weight gain (g) vs. oxygen consumption in a fresh water fish, Channa gachua (Ham.). With unit increase in dry weight and protein weight (g) the oxygen uptake in this fish increased by a fractional power of 0.3927 and 0.5942 (b values or regression coefficient) respectively. The correlation coefficients (r values) were respectively 0.9002 and 0.09727 (p>0.05) indicating very high degree of correlation amongst these parameters. The details have been discussed in this paper.