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°C. The greatest percentage survival, growth, development occurred when larvae were reared between 26 and 29°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°C to 23.5°C significantly increased larval metamorphosis without affecting larval survival. Short-term (1 h) increase in larval rearing temperature from 26°C to 29 and 31°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.

Item Type:	Refereed Article
Keywords:	Ostrea angasi, flat oyster hatchery
Research Division:	Agricultural and Veterinary Sciences
Research Group:	Fisheries Sciences
Research Field:	Aquaculture
Objective Division:	Animal Production and Animal Primary Products
Objective Group:	Fisheries - Aquaculture
Objective Field:	Fisheries - Aquaculture not elsewhere classified
Author:	O'Connor, S (Mr Stephan O'Connor)
Author:	Moltschaniwskyj, N (Associate Professor Natalie Moltschaniwskyj)
Author:	Bolch, CJS (Dr Christopher Bolch)
ID Code:	95160
Year Published:	2014
Deposited By:	NC Marine Conservation and Resource Sustainability
Deposited On:	2014-09-25
Last Modified:	2015-03-17
Downloads:	0