Artificial maturation of Chinese rosy bitterling <I>Rhodeus ocellatus ocellatus</I> using steroid hormone and salmon pituitary extract

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  • Oda Yuka
    Program in Environmental Management, Graduate School of Agriculture, Kinki University
  • Kitagawa Tetsuro
    Program in Environmental Management, Graduate School of Agriculture, Kinki University
  • Hosoya Kazumi
    Program in Environmental Management, Graduate School of Agriculture, Kinki University

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Other Title
  • ステロイドホルモンとサケ脳下垂体を用いたタイリクバラタナゴの人工催熟
  • ステロイドホルモン ト サケ ノウカスイタイ オ モチイタ タイリクバラタナゴ ノ ジンコウサイジュク

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Abstract

The purpose of this study was to develop a technique for artificial propagation for bitterlings under a completely artificial environment by injecting Chinese rosy bitterlings, Rhodeus ocellatus ocellatus, an experimental animal, with a hormone. Salmon pituitary extract or 17α-hydroxyprogesterone was injected into the abdominal cavity of female rosy bitterlings in the laboratory. Females with an ovipositor prolonged by the hormone injection were stripped of their eggs after 24 h. Salmon pituitary extract and 17α-hydroxyprogesterone induced females to elongate the ovipositor and mature gonad (Steel-dwass test, P<0.05). However, the ovipositor that was induced by 17α-hydroxyprogesterone injection, was regarded as an aberration. Incidentally, eighty-three eggs were obtained from females into which salmon pituitary extract had been injected; thereby, seventeen larvae emerged. The ripe stage oocyte and regressing oocyte were observed in sections of the gonads. These results show that salmon pituitary extract is effective in inducing ovulation of the rosy bitterling.

Journal

  • Aquaculture Science

    Aquaculture Science 63 (2), 151-158, 2015

    Japanese Society for Aquaculture Science

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