ツユベラ<I>Coris gaimard</I>の成長に伴う食性変化と小石を裏返す採餌行動

DOI

書誌事項

タイトル別名
  • Changes with Growth in Feeding Habits and Gravel Turning Behavior of the Wrasse, Coris gaimard.

抄録

Ontogenetic changes in the diet and foraging behavior of the wrasse, Coris gaimard, were studied on shallow reefs at Kuchierabu-jima Island, southern Japan. C. gaimard selected larger prey with growth, smaller individuals feeding on small crustaceans (e.g., gammarideans) and larger ones feeding on larger molluscs (i.e., pelecypods, gastropods and chitons) and crabs. Although C. gaimard usually took prey from the surface of the substrate, individuals of 5 cm TL and over also foraged for prey under gravel by turning over the latter. The relative frequency of gravel turning and size of gravel turned over increased with growth, larger fish being able to take correspondingly larger prey (e.g., molluscs and crabs) hiding under larger gravel. Especially for small individuals, foraging for alternative prey by turning over gravel may reduce the need to extend the foraging range and consequently the risk of predation.

収録刊行物

  • 魚類学雑誌

    魚類学雑誌 41 (3), 301-306, 1994

    The Ichthyological Society of Japan

詳細情報 詳細情報について

  • CRID
    1390001204761916288
  • NII論文ID
    130004019218
  • DOI
    10.11369/jji1950.41.301
  • ISSN
    18847374
    00215090
  • 本文言語コード
    en
  • データソース種別
    • JaLC
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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