Shellfish culture in an experimental-scale closed recirculating water nursery system.
An experimental-scale, closed recirculating water nursery system was established for the culture of bivalve mollusc seed from Argopecten irradians and Ruditapes philippinarum with the aims of maximizing efficiency, minimizing energy costs, ease of maintenance and operational stability. The following article reports on the results of this trial. Seed scallop growth and survival rates of A. irradians were higher under the closed recirculating water system than in the conventional pond production system. Results from R. philippinarum were the most promising in the new system, with survival rates of seed as high as 50.0, 65.7 and 33.3% at different stocking densities of 10, 20, and 30 individuals/ml, and a conventional pond production system of 42.9, 7.5 and 10.7%, respectively. The results indicate that this may be a suitable mechanism to optimize stability of the nursery system.