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Updated: Jul 8, 2026

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Solid Plate-based Dietary Restriction in Caenorhabditis elegans
Published on: May 28, 2011
陸上の肉食動物の食事に対するエネルギー上の制約
C Carbone1, G M Mace, S C Roberts
1Institute of Zoology, Zoological Society of London, UK. chris.carbone@ioz.ac.uk
Nature
|December 2, 1999
まとめ
肉食動物は,小型の無脊椎動物の獲物から大型の脊椎動物の獲物へと変化し,約21.5~25kgになる. このサイズ転換はエネルギー需要によって引き起こされ,無脊椎動物の食事はより大きな肉食動物種にとって持続不可能である.
科学分野:
- 動物学 動物学
- エコロジー エコロジー エコロジー
- 生理学 生理学とは
背景:
- 哺乳類のカーニヴォーラ系は,生命の歴史と体サイズにおいて大きな多様性を表しています.
- 陸上の肉食動物は,通常,小さな獲物 (無脊椎動物,小脊椎動物) または大きな脊椎動物に特化しています.
- 小さな肉食動物は,より低い摂取率にもかかわらず,その豊富さのために無脊椎動物で繁栄します.
研究 の 目的:
- 肉食動物における獲物の大きさの変化を,捕食者の量と比較して調査する.
- 質量に関連したエネルギー需要が,この食事のシフトを駆動するという仮説を検証するために.
- 無脊椎動物ベースの食事によって持続可能な最大の捕食者質量を決定する.
主な方法:
- 肉食動物の食事における一般的な生きた獲物の項目をレビューする.
- 捕食者の質量と獲物の大きさとの関係を分析する.
- 無脊椎動物の餌の限界を予測するためのエネルギーモデルの開発.
主要な成果:
- 小さな獲物 (<0.5 捕食者の質量) から大きな獲物 (≈ 捕食者の質量) への明確なシフトは, 21.5 25 kgの捕食者の質量で起こります.
- 脊椎動物への餌は,最大持続可能な捕食者質量が21.5kgであると予測されています.
- この予測された質量は,観察された獲物のサイズ移行点と一致する.
結論:
- 捕食者の質量と関連するエネルギー要求は,肉食動物の中で獲物の選択に根本的な変化を促しています.
- 21.5kgの値は,無脊椎動物の資源のみに依存する肉食動物にとって重要な限界を表しています.
- 肉食動物の食事戦略は,体サイズと代謝スケーリング原理によって強く制限されています.
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