In the present work an attempt has been made to study the correlation, if any, between the cyclic changes in VO2 and different haematological parameters in an air breathing fish, Channa punctatus (Bloch). Two peaks of activity were marked in both the parameters. A positive correlation occurs between RBC/V02, Hb/V02 and PCV/V02 in both the sexes. The increase in VO2 seems to be more associated with the increase in RBC count than with the increase in Hb content and PCV. Cyclic changes in VO2 and different blood parameters show parallelism and a physiological balance exists between these two parameters.
The effect of two agrochemicals namely urea and ammonium sulphate on changes in bioenergetic mode/ling has been studied in a fresh water air breathing snake headed murrel, Channa punctatus (Bloch). This study indicated that both the above noted agrochemicals caused appreciable decrease in food efficiency, daily individual growth increment (g/fish/day) and energy value for production of new tissue (P) but on the otherhand the maintenance energy expenditure (i.e. F+U+R) in experimental animals increased as compared to control. The reason for such changes has been discussed in this paper.
The effect of two agrochemicals namely-ammonium sulphate and urea on changes in total oxygen consumption has been studied in a fresh water teleostean fish, Channa punctatus (Bloch). Total oxygen consumption in this fish was 86.54 + 1.4 cc/kg/h. Treatment of sublethal concentration of both urea & ammonium sulphate for 96hrs exposure caused significant decrease in oxygen consumption as compared to control. The effect was more pronounced in ammonium sulphate as compared to urea exposure. The reason for such changes has been discussed in this paper.