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Davis, RW, Croxall, JP and O'Connell, Mark ORCID: 0000-0003-3402-8880 (1989) The reproductive energies of Gentoo (Pygoscelis papua) and Macaroni (Eudyptes chrysolophus) penguins at South Georgia. Journal of Animal Ecology, 58 (1). pp. 59-74. doi:10.2307/4986