日本産イセエビフィロゾ-マ幼生の完全飼育〔英文〕

概要

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About 20, 0OO first stage phyllosomas were cultured at 24-28°C, being fed with nauplii of Artemia. Later stages were fed on Mytilus edulis ovary. Five phyllosomas reached stage VIII, approximately 200 days after hatching. Three phyllosomas reached stage XI and two individuals metamorphosed into pueruli 340-391 days (cf. 306 days for Jasus lalandii) after hatching. More than one molt was observed in several stages: 6 molts for stage VIII, 3 for IX and 3 for X. The intermolt interval was steady at 11-12 days throughout VIII-X, and slight morphological changes were observed at each molt. Stage VIII may be separated into 2 parts: early, consisting of 3 instars without pleopod buds, and advanced, consisting of 3 instars with pleopod buds. Number of stages should be increased to 12, and number of instars will be estimated at 29. Under intensive illumination, repeated molting occurred without morphological change: 9 molts for stage VIII and 5 for X. The hepatopancreas of the newly metamorphosed puerulus gradually became visible, and the puerulus molted into the juvenile stage after 12-15 days. No feeding was observed during the puerulus stage, yet juveniles immediately fed on Mytilus edulis.
日本水産學會の論文