安定同位体比分析によるクロマグロ仔魚の生物餌料の利用実態の推定：成長差との関連

DOI 日本農学文献記事索引 Web Site 被引用文献1件 参考文献15件
  • Tanaka Yosuke
    Amami Station, National Center for Stock Enhancement, Fisheries Research Agency
  • Minami Hiroshi
    National Research Institute of Far Seas Fisheries, Fisheries Research Agency
  • Ishihi Yuka
    National Research Institute of Aquaculture, Fisheries Research Agency
  • Kumon Kazunori
    Amami Station, National Center for Stock Enhancement, Fisheries Research Agency
  • Eba Takeshi
    Amami Station, National Center for Stock Enhancement, Fisheries Research Agency
  • Nishi Akefumi
    Amami Station, National Center for Stock Enhancement, Fisheries Research Agency
  • Nikaido Hideki
    Amami Station, National Center for Stock Enhancement, Fisheries Research Agency
  • Shiozawa Satoshi
    Amami Station, National Center for Stock Enhancement, Fisheries Research Agency

書誌事項

タイトル別名
  • Prey Utilization by Hatchery-reared Pacific Bluefin Tuna Larvae in Mass Culture Tank Estimated Using Stable Isotope Analysis, with Special Reference to Their Growth Variation

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抄録

In mass culture of Pacific bluefin tuna Thunnus orientalis, a marked growth variation is frequently observed after yolk-sac larvae of other species start feeding at 6 - 7 mm in body length (BL), and the growth variation of tuna larvae is a factor leading to the prevalence of cannibalism. In order to examine the prey utilization in relation to the growth variation, stable isotope ratios (δ13C and δ15N) were analyzed for individual larvae. A prey switch experiment was conducted under two different feeding regimes: a group fed rotifers and Artemia nauplii (plankton fed group), and a group fed yolk-sac larvae (fish larvae fed group) from 15 days after hatching (7.38 mm BL). The fish larvae fed group showed significantly higher growth than the plankton fed group. Changes in the δ13C and δ15N of the fish larvae fed group were expressed as an exponential models and showed different patterns from those of the plankton fed group. The δ15N of fast growing tuna larvae collected in the actual mass culture tank after the feeding of yolk-sac larvae were significantly different from those of the slow growing larvae, indicating that prey utilization of tuna larvae were different corresponding to their growth.

収録刊行物

  • 水産増殖

    水産増殖 58 (4), 501-508, 2010

    日本水産増殖学会

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