Seasonal Cycle of Male Gonad Development of the Intertidal Sea Anemone <I>Actinia equina</I> (Cnidaria : Anthozoa) in Sagami Bay, Japan

• Yanagi Kensuke

  Tokyo University of Fisheries

• Segawa Susumu

  Tokyo University of Fisheries

• Okutani Takashi

  College of Bioresource Sciences, Nihon University

Bibliographic Information

Other Title

• Seasonal Cycle of Male Gonad Development of the Intertidal Sea Anemone Actinia equina(Cnidaria:Anthozoa)in Sagami Bay,Japan
• Seasonal Cycle of Male Gonad Developmen

Abstract

The annual cycle of the testicular structure of Actinia equina in Japanese waters was investigated by histological observation. This is the first study concerning the reproductive biology of this species in Japan. Specimens of A. equina were collected once a month from two intertidal rocky shores in eastern Sagami Bay, from January, 1991, to June, 1991, and from April, 1993, to January, 1994, respectively. Most of the specimens were male or non-sexual individuals and there were few females with mature oocytes. Spermatogenesis starts from late fall to early spring and the testicular cysts mature in mid-summer. This indicates that the spawning season of A. equina is mid-summer and sexual reproduction may occur in the summer. Although young are found in the enterons of adults of both sexes all year round, the source of these young remains unknown.

Journal

• BENTHOS RESEARCH

  BENTHOS RESEARCH 51 (2), 13-20, 1996

  JAPANESE ASSOCIATION OF BENTHOLOGY

Keywords

• Actiniaria
• Actinia equina
• reproductive biology
• spermatogenesis
• histology

Details

• CRID: 1390282680456973440
• NII Article ID: 130004997497
• NII Article ID: 10002094891
• NII Book ID: AN10565057
• DOI: 10.5179/benthos1996.51.2_13
• ISSN: 18838901
• ISSN: 02894548
• NDL BIB ID: 4140745
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4140745
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed