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

Authors

    • Usujiri Fisheries Station, Field Science Center for Northern BiosphereHokkaido University
    • Freshwater Fisheries Research DivisionNational Research Institute of Fisheries Science, Fisheries Research Agency
  • Motoko R. Kimura
    • Division of Biosphere Science, Graduate School of Environmental ScienceHokkaido University
  • Noriyosi Sato
    • Division of Biosphere Science, Graduate School of Environmental ScienceHokkaido University
  • Keita Sakai
    • Division of Biosphere Science, Graduate School of Environmental ScienceHokkaido University
  • Takuzo Abe
    • Shizugawa Nature Center
  • Hiroyuki Munehara
    • Usujiri Fisheries Station, Field Science Center for Northern BiosphereHokkaido University
Full Paper

DOI: 10.1007/s10228-009-0116-z

Cite this article as:
Awata, S., Kimura, M.R., Sato, N. et al. Ichthyol Res (2010) 57: 16. doi:10.1007/s10228-009-0116-z

Abstract

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.

Keywords

DragonetsReproductive behaviourBreeding seasonSpawning timeWater temperatureNorthern limit region

Copyright information

© The Ichthyological Society of Japan 2009