Individual diet variation in a marine fish assemblage: Optimal Foraging Theory, Niche Variation Hypothesis and functional identity

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• 作者：M. Cachera^a ; ^b ; B. Ernande^a ; ^{bruno.ernande@ifremer.fr} ; M.C. Villanueva^c ; S. Lefebvre^d
• 关键词：Specialization ; Trophic similarity ; Size-dependent diet variation ; English Channel ; Semi-enclosed sea
• 刊名：Journal of Sea Research
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：120
• 期：Complete
• 页码：60-71
• 全文大小：997 K
• 卷排序：120

文摘

Proximate and ultimate sources of individual diet variation were investigated in a marine fish assemblage/ Proximate sources of individual diet variation suggested by Optimal Foraging Theory were supported/ Ultimate sources of individual diet variation related to the Niche Variation Hypothesis were only partly supported/ Partial resource partitioning was revealed as higher individual diet variation resulted in limited increase in niche overlap/ Combining various trophic niche metrics allows inferring competition effects on communities’ trophic niche organization