Dissolved organic matter accumulation by juveniles of the purple-hinge rock scallop, Hinnites multirugosus gale

Abstract

1. 1. Juveniles of the purple-hinge rock scallop, Hinnites multirugosus, accumulate C 14 from dissolved organic matter (DOM) exudated by giant kelp Macrocystis pyrifera labeled by photosynthesis with NaHC 14O 3. 2. 2. Small juveniles (8–12 mm shell length) concentrated C 14-DOM 150-fold from the medium after 24 hr. 3. 3. Intermediate juveniles (12–21 mm shell length) concentrated C 14-DOM 90-fold from the medium after 24 hr. 4. 4. Of the C 14-DOM concentrated by the scallops, 6.5–10.4% appeared in the total carbohydrate fraction, 6.8–8.4% as free-reducing substances, and lesser amounts in DNA, RNA, lipid and protein. 5. 5. Implications of these data to aquaculture are discussed.