Effects of Water Temperature and Hypoxia on the Oxygen Consumption of Eggs of King Crab

Abstract

Oxygen consumption (VO₂) of eggs of king crab Paralithodes camtschaticus at 20 days (E-20), 100 days (E-100), 200 days (E-200) and 300 days (E-300) after fertilization was measured at 3, 8 and 13°C and at the hypoxia.
From E-20 to E-200, VO₂ increased, but VO₂ at E-200 and E-300 was the same. Oxygen consumption at 13°C was the highest and the lowest was at 3°C.
The value of oxygen saturation where VO₂ was maintained at a similar rate to VO₂ at oxygen saturation of 90-100% was the lowest at E-100 at 3, 8 and 13°C. A homoeostasis of VO₂ at egg stage was observed at oxygen saturation higher than 50%. The effect of water temperature on VO₂ at the hypoxia had the same tendency.