Ichthyological Research

, Volume 57, Issue 1, pp 16–23

Breeding season, spawning time, and description of spawning behaviour in the Japanese ornate dragonet, Callionymus ornatipinnis: a preliminary field study at the northern limit of its range

  • Satoshi Awata
  • Motoko R. Kimura
  • Noriyosi Sato
  • Keita Sakai
  • Takuzo Abe
  • Hiroyuki Munehara
Full Paper


The reproductive behaviour of the Japanese ornate dragonet (Callionymus ornatipinnis) was studied at the northernmost limit of its distribution at Usujiri in southern Hokkaido, Japan. Field observations confirmed that C. ornatipinnis reproduced at Usujiri, and this is the first detailed description of the reproductive behaviour of C. ornatipinnis. Males were observed to swim continuously in a sandy area where females were abundant, persistently approaching females and performing courtship displays. Courtship behaviour consisted of males spreading their fins in front of females. If a female accepted a male for spawning, the pair would then ascend upward 0.7–1.2 m from the sandy bottom and release their pelagic eggs. Spawning, which occurred daily at dusk for approximately 1 h and ceased when it became dark, was related to water temperature and was only observed when water temperature exceeded 19°C. The breeding season of this species at Usujiri spanned only the month of September, which is considerably shorter than that of other dragonet species inhabiting temperate waters. The short breeding season was probably attributed to the fact that the water temperature at Usujiri only exceeds 19°C in the month of September.


Dragonets Reproductive behaviour Breeding season Spawning time Water temperature Northern limit region 


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Copyright information

© The Ichthyological Society of Japan 2009

Authors and Affiliations

  • Satoshi Awata
    • 1
    • 4
  • Motoko R. Kimura
    • 2
  • Noriyosi Sato
    • 2
  • Keita Sakai
    • 2
  • Takuzo Abe
    • 3
  • Hiroyuki Munehara
    • 1
  1. 1.Usujiri Fisheries Station, Field Science Center for Northern BiosphereHokkaido UniversityHakodateJapan
  2. 2.Division of Biosphere Science, Graduate School of Environmental ScienceHokkaido UniversitySapporoJapan
  3. 3.Shizugawa Nature CenterMotoyoshiJapan
  4. 4.Freshwater Fisheries Research DivisionNational Research Institute of Fisheries Science, Fisheries Research AgencyUedaJapan

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