ホシガレイの卵母細胞の最終成熟過程と排卵周期

DOI 日本農学文献記事索引 Web Site 被引用文献4件 参考文献20件
  • 澤口 小有美
    独立行政法人水産総合研究センター北海道区水産研究所
  • 大久保 信幸
    独立行政法人水産総合研究センター北海道区水産研究所
  • 有瀧 真人
    独立行政法人水産総合研究センター宮古栽培漁業センター
  • 太田 健吾
    独立行政法人水産総合研究センター伯方島栽培技術開発センター
  • 松原 孝博
    独立行政法人水産総合研究センター北海道区水産研究所

書誌事項

タイトル別名
  • Process of Final Oocyte Maturation and Ovulation Cycle in Captive Spotted Halibut, Verasper variegatus
  • ホシガレイ ノ ランボ サイボウ ノ サイシュウ セイジュク カテイ ト ハイラン シュウキ

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抄録

Acquisition of high-quality eggs showing high fertility is essential for the success of artificial production of juvenile spotted halibut Verasper vayiegatus. The objective of this study is to clarify ovulation cycles and time course changes of maturating oocytes of this species for improvement of the method of egg collection. By cannulating a fragment of ovigerous lamellae using a syringe connected to a polyvinyl tube inserted into the ovary from the genital pore, oocytes with follicle layers and eggs were obtained. The oocytes and eggs at different maturational phases were categorized into six maturational stages based on their morphological appearances. With the progression of the maturational stages, the transparency of oocytes increased due to yolk granule fusion and the oocytes hydrated through marked water influx. Time course changes in the maturational stages based on daily cannulation of the same individuals demonstrated that oocyte maturation was completed within five or six days and ovulation occurred at cycles of three days. Results from comparison of fertility of eggs from females with or without removing formerly ovulated eggs coupled with the ovulation cycle suggested the effectiveness of periodical removal of deposited overripe eggs to improve the method of collecting eggs for artificial fertilization in spotted halibut.

収録刊行物

  • 水産増殖

    水産増殖 54 (4), 465-472, 2006

    日本水産増殖学会

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