EFFECT OF TEMPERATURE ON OXYGEN-CONSUMPTION OF JUVENILE OVAL SQUID SEPIOTEUTHIS-LESSONIANA

The effects of water temperature on oxygen consumption rate of the juv enile oval squid Sepioteuthis lessoniana ranging from 0.04 to 4.28 g i n body weight were investigated individually by a water bottle method at 10, 15, 20, 25, and 30 degrees C. Oxygen consumption rate in mi oxy gen/indiv./h (R) increased linearly with increase of body weight in g (W) and was expressed as R=aW(b) . C-T for all temperature conditions (T), where a=0.143, b=0.929, and C=1.069 (n=202). The correlation coef ficient between R and T was 0.993, and Q(10) showed 1.95 within the ra nge of 10 and 30 degrees C. The influence of temperature on the oxygen consumption was relatively constant in the young over 0.48 g up to 4. 28 g at temperature levels under the present investigation. However, t he effect of temperature upon oxygen consumption rates was larger in t he younger squid reared at a temperature higher than 20 degrees C. The metabolism of squid in the early stages before 0.199 g is assumed to be strongly affected by the differences of water temperature within th e range of 15-25 degrees C.