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Individual diet variation in a marine fish assemblage: Optimal Foraging Theory, Niche Variation Hypothesis and functional identity ArchiMer
Cachera, Marie; Ernande, Bruno; Villanueva, Ching-maria; Lefebvre, Sebastien.
Individual diet variation (i.e. diet variation among individuals) impacts intra- and inter-specific interactions. Investigating its sources and relationship with species trophic niche organization is important for understanding community structure and dynamics. Individual diet variation may increase with intra-specific phenotypic (or “individual state”) variation and habitat variability, according to Optimal Foraging Theory (OFT), and with species trophic niche width, according to the Niche Variation Hypothesis (NVH). OFT proposes “proximate sources” of individual diet variation such as variations in habitat or size whereas NVH relies on “ultimate sources” related to the competitive balance between intra- and inter-specific competitions. The latter implies...
Tipo: Text Palavras-chave: Specialization; Trophic similarity; Size-dependent diet variation; English Channel; Semi-enclosed sea.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00349/45986/46031.pdf
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