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.
• Format: Text
• Language: English
• Published: Springer Berlin Heidelberg 2021
• Subjects: Ecosystem Ecology–Original Research; Antarctic; Hydrurga; The Antarctic; Weddell; Antarc*; Crabeater Seal; Euphausia superba; Hydrurga leptonyx; Leopard Seal; Weddell Seal
• Online Access: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8585811/; http://www.ncbi.nlm.nih.gov/pubmed/34626270; https://doi.org/10.1007/s00442-021-05045-z

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 carcinophaga), Wedd...