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Article
K. L. Fletcher, Auteur ; K. C. Hamer, AuteurCapsule Within-pair comparisons substantially improve the accuracy of sexing from biometrics for two congeneric species of seabird with monomorphic plumage and soft-tissue colouration. Aims To examine the extent to which statistical limitations [...]
Article
R. A. Phillips, Auteur ; S. Bearhop, Auteur ; K. C. Hamer, Auteur ; D. R. Thompson, AuteurThe St Kilda archipelago is a World Heritage Site holding internationally important populations of a number of seabird species. Great Skuas first bred at St Kilda in 1963, and numbers there rose steadily until 1990. Since then, a rapid expansion[...]
Article
J. A. Robinson, Auteur ; K. C. Hamer, AuteurDans Ardea (88(1) 2000)Food provisioning rates and chick growth rates of Common Terns Sterna hirundo and Arctic Terns S. paradisaea were studied in Northeast England. Adult terns of both species fed large broods more frequently than those containing fewer chicks. Ener[...]
Article
K. C. Hamer, Auteur ; J. K. Hill, Auteur ; I. Scott, AuteurGory's Shearwaters, in common with other species of Procellariiformes, accumulate large quantities of body fat after hatching. This pattern of development has been related both to temporal variation in feeding conditions around the colony and to[...]
Article
S. Lewis, Auteur ; T. N. Sherratt, Auteur ; K. C. Hamer, Auteur ; M. P. Harris, Auteur ; S. Wanless, AuteurThe diet of Northern Gannets Morus bassanus during chick rearing was determined at two colonies in the UK and Ireland that differed markedly in size (the Bass Rock with c. 40 000 breeding pairs, and Great Sallee with 2000 breeding pairs). Gannet[...]
Article
K. C. Hamer, Auteur ; E. M. Humphreys, Auteur ; M. C. Magalhaes, Auteur ; S. Garthe, Auteur ; J. Hennicke, Auteur ; G. Peters, Auteur ; D. Gremillet, Auteur ; H. Skov, Auteur ; S. Wanless, AuteurMovement patterns of predators should allow them to detect and respond to prey patches at different spatial scales, particularly through the adoption of area-restricted search (ARS) behaviour. Here we use fine-scale movement and activity data co[...]
Article
N. J. Royle, Auteur ; K. C. Hamer, AuteurWe manipulated the within-brood mass hierarchy of Lesser Black-backed Gulls Larus fuscus, controlling for chick quality (related to laying order) by swapping last hatched (c-) chicks in experimental broods with a- or b- chicks from residual broo[...]
Article
J. S. Bradley, Auteur ; J. M. Cox, Auteur ; L. W. Nicholson, Auteur ; R. D. Wooller, Auteur ; K. C. Hamer, Auteur ; J. K. Hill, AuteurThe single young of shearwaters grows slowly and is fed at long, often highly variable, intervals. We monitored the growth patterns of nestling Short-tailed Shearwaters Puffinus tenuirostris exchanged between nests in order to assess whether the[...]
Article
R. A. Phillips, Auteur ; K. C. Hamer, AuteurAlthough periodic weighing of chicks is used widely as a means to assess meal mass and feeding frequency in seabirds, there have been few critical assessments of its effectiveness. Using established methods, we were able to predict whether feedi[...]
Article
C. M. Gray, Auteur ; M. D. L. Brooke, Auteur ; K. C. Hamer, AuteurIn animals that produce few offspring during their lifetime, the ability to raise high-quality offspring through the provision of parental care is particularly important for individual fitness. In this paper, we use repeatability analysis of dat[...]
