Stable isotopes reveal trophic segregation by sex and age in the southern giant petrel in two different food webs

• Published in: Marine Ecology Progress Series
• Main Authors: Forero, Manuela G., Gonzalez-Solis, Jacob, Hobson, Keith A., Donazar, Jose A., Bertellotti, Marcelo, Blanco, Guillermo, Bortolotti, Gary R.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Inter-Research 2005
• Subjects: Zoology; Antarctic; Bird Island; Giganteus; Patagonia; The Antarctic; Antarc*; Antarctica; Giant Petrel; Macronectes giganteus
• Online Access: http://nora.nerc.ac.uk/id/eprint/1767/

We investigated trophic ecology variation among colonies as well as sex- and age-related differences in the diet of the southern giant petrel Macronectes giganteus, a long-lived seabird that is sexually dimorphic in size. We measured stable isotopes (δ13C, δ15N) in blood samples collected during bre...