Ichthyological Research

, Volume 53, Issue 2, pp 179–181 | Cite as

Lunar-synchronized reproductive activity in the pencil-streaked rabbitfish Siganus doliatus in the Chuuk Lagoon, Micronesia

  • Yong Ju Park
  • Akihiro TakemuraEmail author
  • Young Don Lee
Short report


The annual reproductive and the lunar-related spawning cycles of the pencil-streaked rabbitfish Siganus doliatus collected from Chuuk Lagoon, Federated States of Micronesia, were examined histologically. Monthly collection of this species revealed that ovaries with developing oocytes containing yolk were observed from February to May and in August and September. Weekly collection of the fish showed that ovarian development and spawning after the first quarter moon were repeated during the reproductive season, suggesting that S. doliatus is a restricted lunar-synchronized spawner and releases gametes around the time of the first quarter moon.

Key words

Lunar cycle Micronesia Reproduction Siganus doliatus Spawning 


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Copyright information

© The Ichthyological Society of Japan 2006

Authors and Affiliations

  1. 1.Sesoko Station, Tropical Biosphere Research CenterUniversity of the RyukyusOkinawaJapan
  2. 2.Marine Research InstituteCheju National UniversityJeju-doRepublic of Korea

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