マコガレイ稚魚の捕食者としてのエビジャコの餌選択機構

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  • 中屋 光裕
    Fisheries Research Agency, National Center for Stock Enhancement
  • 高津 哲也
    Laboratory of Marine Bioresources Ecology, Division of Marine Environment and Resources, Graduate School of Fisheries Sciences, Hokkaido University
  • 中神 正康
    Fisheries Research Agency, Tohoku National Fisheries Research Institute, Hachinohe Branch
  • 城 幹昌
    Laboratory of Marine Bioresources Ecology, Division of Marine Environment and Resources, Graduate School of Fisheries Sciences, Hokkaido University
  • 高橋 豊美
    Laboratory of Marine Bioresources Ecology, Division of Marine Environment and Resources, Graduate School of Fisheries Sciences, Hokkaido University

書誌事項

タイトル別名
  • Prey Choice Order of Crangon uritai as a Predator for Juvenile Pleuronectes yokohamae

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抄録

During the spring in the coastal waters of Hakodate Bay the shrimp Crangon uritai is the predominant predator on larval and juvenile marbled sole, Pleuronectes yokohamae. To investigate the prey preferences of C. uritai, P. yokohamae and two other prey species, a mysid Nipponomysis sp. and a gammarid Haustorioides japonicas, were used for predation experiments. Among the three prey organisms studied, Nipponomysis sp. was preyed on first, followed by P. yokohamae, and finally H. japonicas. Prey profitability did not differ between P. yokohamae and Nipponomysis sp., though H. japonicas was less profitable. Nipponomysis sp. was larger, more perceptible, and slower to escape than P. yokohamae. A relatively high abundance of mysid Nipponomysis sp. could restrict and reduce predation on P. yokohamae by C. uritai. Gammarid H, japonicas was able to escape relatively more easily, because its harder and slippery skin required more handling time than the other prey, possibly making it an undesirable food source for C. uritai. High perceptibility and low escape ability may be the most important factors affecting prey choice of C. uritai.

収録刊行物

  • 水産増殖

    水産増殖 52 (2), 121-128, 2004

    日本水産増殖学会

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