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Ichthyological Research

, Volume 43, Issue 3, pp 307–313 | Cite as

Bigamy or monogamy with maternal egg care in the triggerfish,Sufflamen chrysopterus

  • Masahiro Ishihara
  • Tetsuo Kuwamura
Article

Abstract

Reproductive behavior and mating systems of the triggerfish,Sufflamen chrysopterus (Balistidae), were studied on the fringing reef of Sesoko Island, Okinawa. Both males and females maintained territories against consexual adults, feeding on benthic animals within their own territories. Each male territory overlapped one or two female territories, with mating occurring between the cohabitants. The monogamous males were smaller and foraged more frequently than the bigamous ones, suggesting that the former allocated more energy to growth rather than to improving reproductive success. Pair spawning occurred around sunrise, females only taking care of the demersal eggs until hatching, which occurred around sunset of the same day. On spawning days females foraged less frequently than usual, but as frequently as males. Females spawned at intervals of 5–7 days, usually shifting sites within their territories. Thus both feeding and spawning sites were available for females within their territories, providing males with the opportunity to monopolize females by defending their territories.

Key words

Balistidae female care monogamy bigamy territory 

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Copyright information

© The Ichthyological Society of Japan 1996

Authors and Affiliations

  • Masahiro Ishihara
    • 1
  • Tetsuo Kuwamura
    • 2
  1. 1.Department of Fisheries, Faculty of AgricultureKyoto UniversityKyotoJapan
  2. 2.Biological Laboratory, Faculty of Liberal, ArtsChukyo UniversityNagoyaJapan (Corresponding author)

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