| Japanese clam and hollow oyster spats have been pre-grown under intensive conditions in hatcheries using underground seawater as thermal resource and as source of nutritional salts for forage seaweed production. The main parameters of this environment have been followed up and raising conditions have been controlled (spat density, seawater flow, phytoplankton concentration and temperature). The biological results obtained after interaction processing and the hierarchy of the studied parameters were the object of an economic analysis for each season, comparing different shellfish pre-growth strategies. This study finally allows us to be able to present pre-growth intensive methodology that can be passed on to the professional aquaculture industry. |
