Ichthyological Research

, Volume 67, Issue 1, pp 185–190 | Cite as

Spawning habitat selectivity of Honmoroko, Gnathopogon caerulescens, in lagoon inlets, Lake Biwa, central Japan

  • Takeshi KikkoEmail author
  • Daisuke Ishizaki
  • Yoshitaka Kataoka
  • Nobuyuki Oue
  • Akihisa Sakai
  • Katsuhiro Nishimori
  • Yoshiaki Kai
  • Yasuhiro Fujioka
Short Report


Despite a recent study of Honmoroko, Gnathopogon caerulescens, reproduction in lagoons around Lake Biwa having demonstrated the importance of lagoon inlets as spawning habitats for the species, no quantitative studies have examined the conditions determining the environmental suitability of spawning habitats. A survey of Honmoroko egg distribution in the inlets indicated that mature Honmoroko selectively spawn in regions of greater current velocity, utilizing a greater abundance of submerged plants and larger substrate (gravel and pebble) size, not utilizing the emergent plants, habitat characteristics supported by a generalized linear mixed model. The biological information gained is essential for future conservation of Honmoroko spawning habitats.


Cyprinidae Inlet Lagoon Lake Biwa Spawning 



We thank the Notogawa Fishery Cooperative for assistance with the field research, and Dr. G. S. Hardy for his critical reading of the manuscript. The fieldwork undertaken in this study complied with the current Japanese law.


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Copyright information

© The Ichthyological Society of Japan 2019

Authors and Affiliations

  • Takeshi Kikko
    • 1
    Email author
  • Daisuke Ishizaki
    • 1
  • Yoshitaka Kataoka
    • 1
  • Nobuyuki Oue
    • 1
  • Akihisa Sakai
    • 1
  • Katsuhiro Nishimori
    • 1
  • Yoshiaki Kai
    • 2
  • Yasuhiro Fujioka
    • 1
  1. 1.Shiga Prefectural Fisheries Experiment StationHikoneJapan
  2. 2.Maizuru Fisheries Research Station, Field Science Education and Research CenterKyoto UniversityMaizuruJapan

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