ヒラメ天然稚魚の摂食行動および被食に及ぼす飢餓の影響 Effects of Starvation on Feeding Behavior and Predation Vulnerability of Wild Japanese Flounder Juvenile

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著者

    • 古田 晋平 FURUTA Shinpei
    • 鳥取県大規模活性化プロジェクト推進室 Promotion Office for the Large Scale Activation Project, Tottori Prefectural Government

抄録

Feeding behavior of wild Japanese flounder juvenile with progress in starvation was examined to determine whether starvation could increase vulnerability of wild flounder to predation. Laboratory experiments were conducted using a video observation system to analyze feeding behavior of juvenile flounder such as time of swimming to water column, swimming course and number of attacks in a feeding behavior under starvation up to 7 days. Experiments showed that longer starved juveniles spent a longer time in the water column and returned farther from the initial position. The number of attacks in a feeding behavior increased in a few days after onset of starvation. Fed juvenile flounders were not preyed upon by 1-or 2-year-old flounders, while 3 to 7 days starved juveniles were preyed upon in the laboratory experiment. These findings suggest that wild juvenile flounder change feeding behavior toward more vulnerability to predators with progress in starvation primarily due to longer exposure in the water column and frequent changes of landing position. These changes in feeding behavior found in the laboratory suggest that high mortality of juveniles would occur associated with seasonal reduction in prey mysid abundance in their nursery ground.

収録刊行物

  • 日本水産学会誌  

    日本水産学会誌 64(4), 658-664, 1998-07-15 

    日本水産學會

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各種コード

  • NII論文ID(NAID)
    10004853876
  • NII書誌ID(NCID)
    AN00193422
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00215392
  • NDL 記事登録ID
    4523695
  • NDL 雑誌分類
    ZR26(科学技術--農林水産--水産)
  • NDL 請求記号
    Z18-345
  • データ提供元
    CJP書誌  CJP引用  NDL  IR  J-STAGE 
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