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Sex recognition in brown skuas: do acoustic signals matter?

Tim Janicke, Auteur ; Markus S. Ritz, Auteur ; Steffen Hahn, Auteur ; Hans-Ulrich Peter, Auteur

Dans Journal of Ornithology (148(4) OCT 2007)

Bird vocalisations are often essential for sex recognition, especially in species that show little morphological sex dimorphism. Brown skuas (Catharacta antarctica lonnbergi), which exhibit uniform plumage across both sexes, emit three main call[...]

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Article

Sex-specific mass loss in chick-rearing South Polar Skuas Stercorarius maccormicki - stress induced or adaptive?

Markus S. Ritz, Auteur

Dans Ibis (149(1) JAN 2007)

Mass loss of chick-rearing birds can be the direct consequence of physiological stress (reproductive stress hypothesis) or an adaptive mass adjustment in response to the increased demands on flight efficiency during the flight-intensive chick-re[...]

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Article

Supplementary DNA evidence fails to confirm presence of Brown Skuas Stercorarius antarctica in Europe: a retraction of Votier et al. (2004)

Stephen C. Votier, Auteur ; Martyn Kennedy, Auteur ; Stuart Bearhop, Auteur ; Richard G. Newell, Auteur ; Kate Griffiths, Auteur ; Helen Whitaker, Auteur ; Markus S. Ritz, Auteur ; Robert W. Furness, Auteur

Dans Ibis (149(3) JUL 2007)

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