The Effect of Temperature on Oxygen Consumption Rate of Fresh Water Clam Unio tigridis from AL-Habbania Lake

Abstract

The oxygen consumption rates )ml O2 /gm/ hr) of fresh water clam Unio tigridis were measured at different temperatures, the oxygen consumption increased significantly with dry tissue weight (gm ) of U. tigridis at all studied temperatures.The oxygen consumption rates for six size classes ranged between 0.5904 and 1.8603 ( ml O2 /gm / hr) with the correlation coefficient r= 0.92.The temperatures had significant effect on oxygen consumption ,the relation was highly significant ( r= 0.97 ) , Oxygen consumption rates ranged between 1.1663 , 1.4914 (mlO2 /gm / hr) at temperatures 15 ,35C respectively.Temperature Coefficient(Q10) was at its highest values in the temperature range ( 25 – 35 C) compared with its values at ( 15 – 25 C ) temperature range for all size classes , while Q 10 was at the highest value at lower dry tissue weight and decreased with the increase of dry tissue weight at all studied temperature ranges.