진주조개 Pinctada fucata martensii의 실내월동을 위한 저온노출에 따른 생리적 변화

Abstract

With the aim of developing and indoor overwintering technique for Pearl oyster, Pinctada fucata martensii, the metabolic rates of young oysters (52.4-83.0 mm in shell length) were measured for 2 weeks at water temperatures of 8, 10, 12, and . The filtration rate (FR) ranged 0 to (mean, to ), with significant changes observed over thme except for the case of a water temperature of . Respiration rate (R) ranged from 0 to (mean, 0 to ), with significant respiratory disorders observed at temperatures below ; in contrast, the rate increased on the day of the experiment in the case of a temperature of 14. No significant difference was observed among the different water temperatures in terms of excretion rate (E) or absorption efficiency (Abs.eff), except for a significant decrease in aerobic metabolism in the case of water temperature of . The estimated scope for growth (SFG) ranged from -9.1 to (mean. to ). A significant energy Joss was found at , with negative SFG observed throughout the experiment and a gradual energy decrease observed over time at water temperatures of and 120C. However. SFG remained positive throughout the experiment in the case of . The estimated minimum energy requirement, assessed from energy expenditure, is (mean, ). In conclusion, the lowest temperature suitable for indoor overwintering is above .