Application of live monocells from macroalgae to shellfish seed production

Monocells were isolated from several macroalgae, Porphyra yezoensis, Undari a pinnatifida, and Laminaria japonica, by digestion with alga-tool enzymes. The monocells were then used to feed the parents or larvae of bay scallop Argopecten irradians, blood cockle Arca inflata, and abalone Haliotis discu s juveniles. Results showed that the parents of bay scallop and blood cockl e fed with Porphyra monocells could mature and discharge eggs and spermatoz oa and their larvae could metamorphose; the survival rate of abalone juveni les fed with isolated cells from Laminaria and Undaria increased by 100% co mpared with that of those fed with artificial food.