Assessment of temperature or salinity effects on larval development by catecholamine-induced metamorphosis of hatchery-reared flat oyster, Ostrea angasi (Sowerby 1871) larvae

作者：O'Connor Stephan^*; Moltschaniwskyj Natalie; Bolch Christopher J S; O'Connor Wayne

来源：Aquaculture Research, 2015, 46(10): 2501-2511.

DOI：10.1111/are.12408

• flat oyster
• Ostrea angasi
• larvae
• metamorphosis
• salinity
• temperature

A need to improve larval rearing techniques led to the development of protocols for catecholamine-induced settlement of flat oyster, Ostrea angasi, larvae. To further refine these techniques and optimize settlement percentages, the influence of salinity or temperature on development of O. angasi larvae was assessed using epinephrine-induced metamorphosis. Larvae were reared between salinities of 15-35 and temperatures between 14.5 and 31 degrees C. The greatest percentage survival, growth, development occurred when larvae were reared between 26 and 29 degrees C and between salinities of 30 and 35. Larvae reared outside this salinity and temperature range exhibited reduced growth, survival and/or delayed development. Short-term (1 h) reduction in larval rearing temperature from 26 degrees C to 23.5 degrees C significantly increased larval metamorphosis without affecting larval survival. Shortterm (1 h) increase in larval rearing temperature from 26 degrees C to 29 and 31 degrees C decreased larval survival and metamorphosis. To ensure repeatability in outcomes, tests showed that larvae sourced from different estuaries did not vary significantly in their metamorphic response to short-term temperature manipulation and epinephrine-induced metamorphosis.

• 出版日期2015-10