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. 2021 Jul 26;11:15147. doi: 10.1038/s41598-021-94610-w

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Topology of biting marine mammals in the isospace. Species: common dolphin (Dd), white-beaked dolphin (Lal), Atlantic white-sided dolphin (Lac), harbor porpoise (Pp), striped dolphin (Sc), harbor seal (Pv), gray seal (Hg), bottlenose dolphin (Tt), Mediterranean monk seal (Mm), Atlantic humpback dolphin (St), Atlantic spotted dolphin (Sf), false killer whale (Pc), rough-toothed dolphin (Sb), Guiana dolphin (Sg), Fraser's dolphin (Lh), pantropical spotted dolphin (Sa), spinner dolphin (Sl), franciscana dolphin (Pb), Burmeister's porpoise (Ps), South American sea lion (Of), South American fur seal (Aa), southern right whale dolphin (Lp), spectacled porpoise (Pd), hourglass dolphin (Lc), Peale’s dolphin (Lau), Commerson’s dolphin (Cc). Morphological groups: pinnipeds (brown dots) and brevirostrine (black dots), intermediate (gray dots) and longirostrine (white dots) odontocetes. Plot axes: X = δ¹³C (‰); Y = δ¹⁵N (‰).