The status of California halibut, Paralichthys californicus, as a technologically feasible species for marine U.S. aquaculture

Abstract

AbstractCalifornia halibut (CH; Paralichthys californicus) is a highly valued species that supports a commercial and recreational fishery along the Pacific coast of the United States. This species is considered a promising aquaculture candidate in California, with interest for both food production and stock replenishment. Culture of CH has been done on a small scale, showing that it is technologically feasible to rear this species commercially. Broodstock maturation and egg production can be accomplished without hormone therapy. Survival from egg to juvenile (~50 dph) can be as high as 30%. Juvenile growout to market size has been done on a limited basis, and it takes 3 years to reach a market size of 1 kg. There is a live market for CH in California and it is currently being supplemented by the importation of Paralichthys olivaceus. The known disease agents affecting CH are ectoparasites (i.e., Trichodina sp), endoparasites (i.e., Anisakis sp.), and bacterial agents (i.e., Pseudomonas sp.). While culture of this species is technologically feasible, research still needs to be done in certain areas in order to realize commercial readiness. These areas include: nutrition, selective breeding, development of all female populations; improved pigmentation; and developing methods for disease prevention and control.