Abstract
Techniques to bring adult scallops Pecten maximus L. into spawning condition in a hatchery environment, known as broodstock conditioning, are reviewed. Previously unpublished data from experiments carried out at the Centre for Environment, Fisheries and Aquaculture Science (CEFAS) Conwy Laboratory on food quantity and quality are also included. Factors shown to be important for the production and viability of scallop eggs and embryos (in terms of numbers developing into D-larvae) are identified. In particular, eicosapentaenoic acid (20:5 n−3), docosahexaenoic acid (22:6 n−3) and arachadonic acid (20:4 n−6) are named as essential fatty acids that must be supplied in microalgae diets during broodstock conditioning. Other factors that are considered include the uptake and assimilation of microalgae species as well as the optimisation of seawater temperature and photoperiod. Techniques for the hatchery conditioning of P. maximus are discussed in relation to those for other pectinid species.
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