Change of Bone Formation and Phototaxis along with the Growth of the Juvenile of <I>Hippocampus kuda</I>

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  • Iwatani Koji
    School of Marine Science and Technology, Tokai University Graduate School
  • Kaneko Makoto
    School of Earth and Environmental Science, Tokai University Graduate School
  • Akiyama Nobuhiko
    School of Marine Science and Technology, Tokai University

Bibliographic Information

Other Title
  • クロウミウマ <I>Hippocampus kuda</I> 稚魚の成長に伴う骨格形成と走光性の変化
  • クロウミウマHippocampus kuda稚魚の成長に伴う骨格形成と走光性の変化
  • クロウミウマ Hippocampus kuda チギョ ノ セイチョウ ニ トモナウ コッカク ケイセイ ト ソウコウセイ ノ ヘンカ

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Description

This research investigates the changes of the mode of life of the juveniles Hippocampus kuda in relation to the changes of bone formation and phototaxis. The juveniles showed positive phototaxis to side lighting from birth up to 24 days post partum. However, the juveniles showed more positive geotaxis than phototaxis to overhead lighting and began gathering at the bottom. The 1-day post partum and the 11-day post partum juveniles were floating under natural lighting conditions. The 16-day post partum and the 24-day post partum juveniles tended to swim at the bottom during the day, and many of them clung to substrates at night under natural lighting conditions. Most of the juveniles which clung to substrates showed ossification in their tails.<br>The research indicates that the juveniles of H. kuda change from planktonic behavior to benthic behavior at about 16 days post partum. They swim around during the day, and cling to substrates at night.

Journal

  • Aquaculture Science

    Aquaculture Science 61 (2), 145-151, 2013

    Japanese Society for Aquaculture Science

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