Fisheries and Aquaculture Journal
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Yong-Woon Ryu

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• Research Article
  Features of Sperm Motility and Circadian Rhythm in Japanese Anchovy (Engraulis japonicus)
  Author(s): Dipak Pandey, Yong-Woon Ryu and Takahiro Matsubara* Dipak Pandey, Yong-Woon Ryu and Takahiro Matsubara*
  
  Japanese anchovy (Engraulis japonicus) is a commercially and ecologically important fish that exhibits group synchronous and multiple spawning. However, the reproductive characteristics of the male in this species, especially sperm features and activation, are still largely unknown. In this study, we confirmed that features of the sperm and characteristics of the activations, regarding sperm motility and moving velocity. The average size of the sperm was 51 ± 1.3 μm in total length and possessed a normal structure with clockwise, anticlockwise, and linear motion. The initial motility at one minute after activation in seawater was 75 ± 12% during spawning time in this species (21:00– 22:00), and the initial moving velocity (196 ± 26 μm/sec) remained constant for fifteen minutes post a.. View More»
  DOI: 10.4172/2150-3508.1000203

  Abstract PDF

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