A Description of Laboratory-Reared Zoeae of Cancer Magister Dana, and Megalopae Taken Under Natural Conditions (Decapoda Brachyura)

A DESCRIPTION OF LABORATORY-REARED ZOEAE OF CANCER MAGISTER DANA, AND MEGALOPAE TAKEN UNDER NATURAL CONDITIONS (DECAPODA BRACHYURA) BY RICHARD L. POOLE California Department of Fish and Game, Marine Resources Operations, Menlo Park, California, U.S.A. INTRODUCTION Nine species of crabs of the genus Cancer occur on the Pacific coast of America, and four of these are taken commercially in California. Cancer magister Dana, the most important commercial species, annually produces over 35 million pounds of shell crab on the Pacific coast with a value of $ 5.5 million to the fishermen. Life history studies of this species have been in progress