Complementary use of stable isotopes and fatty acids for quantitative diet estimation of sympatric predators, the Antarctic pack-ice seals

• Published in: Oecologia
• Main Authors: Guerrero, A. I., Pinnock, A., Negrete, J., Rogers, T. L.
• Other Authors: FONDECYT, Scott Foundation
• Format: Article in Journal/Newspaper
• Language: English
• Published: Springer Science and Business Media LLC 2021
• Subjects: Ecology, Evolution, Behavior and Systematics; Antarctic; The Antarctic; Weddell; Hydrurga; Antarc*; Crabeater Seal; Euphausia superba; Hydrurga leptonyx; Leopard Seal; Weddell Seal
• Online Access: http://dx.doi.org/10.1007/s00442-021-05045-z; https://link.springer.com/content/pdf/10.1007/s00442-021-05045-z.pdf; https://link.springer.com/article/10.1007/s00442-021-05045-z/fulltext.html

Abstract The quantitative use of stable isotopes (SIs) for trophic studies has seen a rapid growth whereas fatty acid (FA) studies remain mostly qualitative. We apply the Bayesian tool MixSIAR to both SI and FA data to estimate the diet of three sympatric predators: the crabeater ( Lobodon carcinoph...