Ichthyological Research

, Volume 53, Issue 3, pp 216–222 | Cite as

Reproductive ecology of the striped bitterling Acheilognathus cyanostigma (Cyprinidae: Acheilognathinae)

  • Jyun-ichi Kitamura
Full paper


The reproductive ecology of the striped bitterling Acheilognathus cyanostigma was investigated in a small pond in Mie Prefecture, central Honshu, Japan. A. cyanostigma was the only species of bitterling in the study pond, where only a single species of mussel Anodonta woodiana was present. Spawning of A. cyanostigma was recorded between early April and early July, peaking between late April and mid-June in 2003. Ovipositor length during the spawning period ranged from 19.2 to 42.8 mm, and was positively correlated with female body length, but did not show significant seasonal variation. The eggs are elliptical with a volume of approximately 1.5 mm3. Egg size correlates positively with female body size, and both egg shape and volume changed significantly with season. The embryos were located on host mussel gills approximately 30 mm from the exhalant siphon and were found more frequently on the inner rather than the outer mussel gills. The possible ecological significance of these observations is discussed in the context of the adaptations of A. cyanostigma for utilizing mussels for oviposition.

Key words

Ovipositor Endangered species Freshwater mussel Egg shape Egg position 


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Copyright information

© The Ichthyological Society of Japan 2006

Authors and Affiliations

  1. 1.Department of ZoologyGraduate School of Science, Kyoto UniversityKyotoJapan

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