EFFECTS OF ALGAE MEAL AS FEED ADDITIVE ON GROWTH, FEED-EFFICIENCY, AND BODY-COMPOSITION IN RED-SEA BREAM

The efficacy of three different algae (Ascophyllum nodosum, Porphyra y ezoensis, and Ulva pertusa) were compared in fingerling red sea bream Pagrus major. Oregon moist diet containing 5% of algae meal were fed f or 41 days and the effects were monitored in terms of growth, feed eff iciency, and body composition. Feeding algae commonly elevated body we ight grain, and tended to increase feed efficiency and muscle protein deposition. Algae-fed groups were higher in liver glycogen and triglyc eride accumulation in muscle. Feeding Porphyra showed the most pronoun ced effects on growth and energy accumulation, followed by Ascophyllum and Ulva. The results suggest the practical efficacy of using algae a s a feed additive for the effective use of nutrients in cultured fish.