Marking scallops with quick-setting cement

Abstract

Previously used materials for marking commercially impoHant bivalve mollusks cannot be applied successfully to the calico scallop, Argopecten gibbus, since this species cannot withstand the air exposure necessary to dry these substances. A quick-setting calciu)7i carbonate cement that will adhere to a wet surface and harden under water was tested and proved to be a suitable marking agent for A. gibbus. The cement is easy to apply, apparently non-toxic and in field tests was retained by calico scallops for 15 mojiths.