口永良部島におけるヤマブキベラ<I>Thalassoma lutescens</I>の成長に伴う食性と採餌行動の変化
書誌事項
- タイトル別名
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- Growth-Related Changes in Diet and Foraging Behavior of the Yellow Wrasse Thalassoma lutescens at Kuchierabu Island.
抄録
Ontogenetic changes in diet and foraging behavior of Thalassoma lutescens were examined in shallow reef habitats around Kuchierabu Island, southern Japan. This species mainly took small benthic invertebrates, including gammarids, polychaetes, sipunculids, chitons, crabs, gastropods, pelecypods and urchins from algal mats. Larger fish consumed correspondingly larger prey, although most of the latter were armored with hard exoskeletons, shells or body plates (e.g., crabs, gastropods, pelecypods and urchins). Such hard parts were crushed with the molar-like, pharyngeal teeth which develop with fish growth, allowing exploitation of such larger, hard-bodied prey. Because the densities of larger prey species were relatively low in the initial habitats foraged, larger fish shifted their foraging attention to rock and coral crevices, where the prey species dwelt in greater numbers, as well as foraging over larger areas. Such behavioral changes maintained high foraging efficiency in larger fish
収録刊行物
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- 魚類学雑誌
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魚類学雑誌 38 (3), 307-313, 1991
The Ichthyological Society of Japan
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詳細情報 詳細情報について
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- CRID
- 1390282679739536128
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- NII論文ID
- 130004019108
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- ISSN
- 18847374
- 00215090
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可