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Documents disponibles écrits par cet auteur (7)
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Article
J. W. Pearce-higgins, Auteur ; R. B. Bradbury, Auteur ; D. E. Chamberlain, Auteur ; A. Drewitt, Auteur ; R. H. W. Langston, Auteur ; S. G. Willis, Auteur
Article
H. M. Cunningham, Auteur ; R. B. Bradbury, Auteur ; K. Chaney, Auteur ; A. Wilcox, AuteurCapsule Several guilds of wintering farmland birds showed preferences for cereal fields established by non-inversion tillage, rather than ploughing. Aims To compare the effects of cereal crop establishment methods using non-inversion tillage and[...]
Article
R. B. Bradbury, Auteur ; D. S. Allen, AuteurCapsule Few positive responses by birds were observed in the first two years of this new agri-environment scheme. Aims To determine whether the pilot Arable Stewardship Scheme delivered increased populations of either breeding or wintering birds[...]
Article
K. L. Evans, Auteur ; J. D. Wilson, Auteur ; R. B. Bradbury, AuteurCapsule The variation in population trends (-86% to +236%) between surveys during 1964-81 and in 1999 and 2000 can be explained by nest-site loss, and possibly agricultural intensification.
Article
M. J. Whittingham, Auteur ; R. B. Bradbury, Auteur ; J. D. Wilson, Auteur ; A. J. Morris, Auteur ; A. J. Perkins, Auteur ; G. M. Siriwardena, AuteurNumbers of many bird species which breed ore farmland, arid are reliant ore cropped land for feeding or nesting, declined between the 1960s and 1990s. In contrast, Chaffinch Fringilla coelebs numbers increased on farmland over the same period. T[...]
Article
A. C. Pagliani, Auteur ; P. L. M. Lee, Auteur ; R. B. Bradbury, AuteurTheory predicts skewed offspring sex-ratios in a range of situations in which the economics of producing the two sexes differ. Offspring sex-ratio skews in birds are relatively scarcely observed compared to other taxa. This could be because avia[...]
Article
R. B. Bradbury, Auteur ; R. Griffiths, AuteurMany birds hatch their eggs asychronously while other species are more synchronous. Different hatching patterns may produce different sex-ratios through sex-biased chick mortality, but the relationship between sex-ratios and hatching pattern has[...]
