室内で観察されたヒザラガイの配偶子放出

概要

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Spawning of the chiton Acanthopleura japonica was observed for 72 hours at 23℃ under constant illumination in the laboratory in August 1984. Of sixty individuals caught at daytime spring low tide, two females and five males spawned simultaneously just before the morning high tide peak on the next day, and one female of them released eggs again on the following day. Early development and larval settlement at different temperatures are shown. Intrinsic timing mechanism for spawning is suggested.
1988-04-15