Peer-Reviewed Journal Details
Mandatory Fields
Mitchell, C; Cranswick, P; Kharatinov, S; Mitev, D; Quinn, JL; Rozenfield, S; Swann, B; Vangluwe, D
2015
January
Wildfowl Journal
Biometrics of Red-breasted Geese Branta ruficollis
Published
()
Optional Fields
Branta ruficollis flat wing moulting moult mass dynamics sexual dimorphism total head and bill length
65
154
166
Biometrics were taken from 242 Red-breasted Geese Branta ruficollis caught in summer on the Taimyr, Yamal and Gydan Peninsulas, arctic Russia in 1996 and 20072014, and from 94 birds during four catches on the wintering grounds in Bulgaria in 20112014. These biometrics represent the first published data of body measurements, flat wing lengths and mass for Red-breasted Geese using sample sizes of more than 14 birds. Males were larger than females amongst adults and first-winter birds. Adult male body mass was lower in winter than during moult, whereas females showed no significant difference. In common with some other arctic-moulting goose species, the mass of most adult geese remained constant throughout the flightless moult period; however, the mass of non-breeding adult females declined. An index of adult winter flat wing length x body mass was a 100% accurate predictor of sex determined by cloacal eversion (n= 22), but was less successful in determining the sex of first-winter birds (9293%, n= 27). Biometrics of Red-breasted Geese Branta ruficollis (PDF Download Available). Available from: https://www.researchgate.net/publication/289108125_Biometrics_of_Red-breasted_Geese_Branta_ruficollis [accessed Jan 19 2018].
Grant Details