Annual reproductive cycle of the chitonAcanthopleura japonica

✍ Scribed by E. Yoshioka

• Book ID: 104763728
• Publisher: Springer-Verlag
• Year: 1987
• Tongue: English
• Weight: 299 KB
• Volume: 96
• Category: Article
• ISSN: 0025-3162
• DOI: 10.1007/bf00412520

✦ Synopsis

Methods

Annual reproductive cycle of the chiton Acanthopleurajaponica (Lischke) was studied by observing both gonad index and histological features from October 1980 to October 1981. No significant changes in each factor were observed from October to April. Increased values of gonad index and spermatogenesis or vitellogenesis in gondas were observed from May to September. In the same time, gonad index decreased and sperms or oocytes in gonads disappeared in the clays around spring tide, and they were recovered around neap tide. Suggested spawning around spring tide from May to September is also supported by the occurrence of released eggs in the days around the new and full moons.

More than 40 Acanthopleurajaponica (Lischke) were collected from the northern rocky shore of the