The isotopic niche of Atlantic, biting marine mammals and its relationship to skull morphology and body size

Abstract Understanding the trophic niches of marine apex predators is necessary to understand interactions between species and to achieve sustainable, ecosystem-based fisheries management. Here, we review the stable carbon and nitrogen isotope ratios for biting marine mammals inhabiting the Atlantic...

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Autores principales:	Massimiliano Drago, Marco Signaroli, Meica Valdivia, Enrique M. González, Asunción Borrell, Alex Aguilar, Luis Cardona
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/041d3490e4ce4e20a5506564de7ab9ff
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spelling	oai:doaj.org-article:041d3490e4ce4e20a5506564de7ab9ff2021-12-02T16:31:48ZThe isotopic niche of Atlantic, biting marine mammals and its relationship to skull morphology and body size10.1038/s41598-021-94610-w2045-2322https://doaj.org/article/041d3490e4ce4e20a5506564de7ab9ff2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94610-whttps://doaj.org/toc/2045-2322Abstract Understanding the trophic niches of marine apex predators is necessary to understand interactions between species and to achieve sustainable, ecosystem-based fisheries management. Here, we review the stable carbon and nitrogen isotope ratios for biting marine mammals inhabiting the Atlantic Ocean to test the hypothesis that the relative position of each species within the isospace is rather invariant and that common and predictable patterns of resource partitioning exists because of constrains imposed by body size and skull morphology. Furthermore, we analyze in detail two species-rich communities to test the hypotheses that marine mammals are gape limited and that trophic position increases with gape size. The isotopic niches of species were highly consistent across regions and the topology of the community within the isospace was well conserved across the Atlantic Ocean. Furthermore, pinnipeds exhibited a much lower diversity of isotopic niches than odontocetes. Results also revealed body size as a poor predictor of the isotopic niche, a modest role of skull morphology in determining it, no evidence of gape limitation and little overlap in the isotopic niche of sympatric species. The overall evidence suggests limited trophic flexibility for most species and low ecological redundancy, which should be considered for ecosystem-based fisheries management.Massimiliano DragoMarco SignaroliMeica ValdiviaEnrique M. GonzálezAsunción BorrellAlex AguilarLuis CardonaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Massimiliano Drago Marco Signaroli Meica Valdivia Enrique M. González Asunción Borrell Alex Aguilar Luis Cardona The isotopic niche of Atlantic, biting marine mammals and its relationship to skull morphology and body size
description	Abstract Understanding the trophic niches of marine apex predators is necessary to understand interactions between species and to achieve sustainable, ecosystem-based fisheries management. Here, we review the stable carbon and nitrogen isotope ratios for biting marine mammals inhabiting the Atlantic Ocean to test the hypothesis that the relative position of each species within the isospace is rather invariant and that common and predictable patterns of resource partitioning exists because of constrains imposed by body size and skull morphology. Furthermore, we analyze in detail two species-rich communities to test the hypotheses that marine mammals are gape limited and that trophic position increases with gape size. The isotopic niches of species were highly consistent across regions and the topology of the community within the isospace was well conserved across the Atlantic Ocean. Furthermore, pinnipeds exhibited a much lower diversity of isotopic niches than odontocetes. Results also revealed body size as a poor predictor of the isotopic niche, a modest role of skull morphology in determining it, no evidence of gape limitation and little overlap in the isotopic niche of sympatric species. The overall evidence suggests limited trophic flexibility for most species and low ecological redundancy, which should be considered for ecosystem-based fisheries management.
format	article
author	Massimiliano Drago Marco Signaroli Meica Valdivia Enrique M. González Asunción Borrell Alex Aguilar Luis Cardona
author_facet	Massimiliano Drago Marco Signaroli Meica Valdivia Enrique M. González Asunción Borrell Alex Aguilar Luis Cardona
author_sort	Massimiliano Drago
title	The isotopic niche of Atlantic, biting marine mammals and its relationship to skull morphology and body size
title_short	The isotopic niche of Atlantic, biting marine mammals and its relationship to skull morphology and body size
title_full	The isotopic niche of Atlantic, biting marine mammals and its relationship to skull morphology and body size
title_fullStr	The isotopic niche of Atlantic, biting marine mammals and its relationship to skull morphology and body size
title_full_unstemmed	The isotopic niche of Atlantic, biting marine mammals and its relationship to skull morphology and body size
title_sort	isotopic niche of atlantic, biting marine mammals and its relationship to skull morphology and body size
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/041d3490e4ce4e20a5506564de7ab9ff
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The isotopic niche of Atlantic, biting marine mammals and its relationship to skull morphology and body size

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