Predation on seabird eggs by Keen’s mice (Peromyscus keeni): using stable isotopes to decipher the diet of a terrestrial omnivore on a remote offshore island

M.C. Drever, L.K. Blight, K.A. Hobson, and D.F. Bertram Abstract: We used stable isotope techniques to analyze tissues of Keen’s mice (Peromyscus keeni) and Townsend’s voles (Microtus townsendii cowani) and a subset of prey items at Triangle Island, British Columbia, western Canada’s largest seabird colony. Isotope analysis allowed us to investigate the importance of seabird