水温および日長調整によるマハタの９月採卵

DOI 日本農学文献記事索引 Web Site 被引用文献2件 参考文献30件
  • 土橋 靖史
    三重県農水商工部
  • 高鳥 暢子
    三重県尾鷲栽培漁業センター
  • 栗山 功
    三重県科学技術振興センター水産研究部尾鷲水産研究室
  • 羽生 和宏
    三重県科学技術振興センター水産研究部尾鷲水産研究室
  • 辻 将治
    三重県科学技術振興センター水産研究部尾鷲水産研究室
  • 津本 欣吾
    三重県科学技術振興センター水産研究部尾鷲水産研究室

書誌事項

タイトル別名
  • Induced Spawning of Cultured Sevenband Grouper, Epinephelus septemfasciatus, in September by Manipulation of Water Temperature and Photoperiod
  • スイオン オヨビ ニッチョウ チョウセイ ニ ヨル マハタ ノ 9ガツ サイラン

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抄録

The Sevenband grouper, Epinephelus septemfasciatus was cultured in indoor tanks in 2004 and 2005. The tanks used for experimental treatments were maintained under conditions of low water temperature (14.5 -17.0°C) and short day-length (6h: 18h, L: D) from April to the end of July. Afterwards, the water temperature and photoperiod were gradually increased to reach 18.5°C and long day-length (14h: 10h, L: D) by September. The control tank was assumed to be at natural ambient water temperature and photoperiod. At the end of August, pre-vitellogenic oocytes and over-ripened eggs were collected from fish cultured under control conditions and vitellogenic oocytes were collected from fish cultured under treatment conditions. Artificial fertilization by HCG injection in September produced no fertilized eggs from fish under control conditions, but fertilized eggs were obtained from fish under treatment conditions. A comparison of floating eggs rate, fertilization rate, hatching rate, Survival Activity Index (SAT) and 10 days after hatching survival rate for spawning in September (treatment) and May (control) found no significant differences (P>0.05, t-test) . The fish produced were raised to juvenile stage. We conclude that it is possible to delay spawning of the sevenband grouper until September by manipulation of water temperature and photoperiod.

収録刊行物

  • 水産増殖

    水産増殖 55 (3), 395-402, 2007

    日本水産増殖学会

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