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Article
P. J. Butler, Auteur ; A. J. Woakes, Auteur ; C. M. Bishop, AuteurFew studies of Night physiology have used birds that are in the migratory state. Thug we obtained behavioural and physiological data from a group of Svalbard Barnacle Geese before and during the autumn migration from their breeding area around N[...]
Article
J. A. Green, Auteur ; J. L. Tanton, Auteur ; A. J. Woakes, Auteur ; I. L. Boyd, Auteur ; P. J. Butler, AuteurWe tested the hypothesis that implanted data loggers have no effect on the survival, breeding success and behaviour of macaroni penguins Eudyptes chrysolophus. Seventy penguins were implanted with heart rate data loggers (DLs) for periods of up [...]
Article
J. A. Green, Auteur ; P. J. Butler, Auteur ; A. J. Woakes, Auteur ; I. L. Boyd, AuteurThe metabolic rate of moulting macaroni penguins Eudyptes chrysolophus was investigated using three techniques in order to test two hypotheses concerning the energetic cost of the moult fast in penguins. First, that energy expenditure during the[...]
Article
L. G. Halsey, Auteur ; O. J. Brand, Auteur ; A. J. Woakes, Auteur ; P. J. Butler, Auteur
Article
P. A. J. Hawkins, Auteur ; P. J. Butler, Auteur ; A. J. Woakes, AuteurFive female Common Eider ducklings taken under licence from a population at the Isle of May, Firth of Forth, Scotland, were reared from eggs. Weekly measurements were made of the tibiotarsus, ulna, head, ninth primary, body mass, wing and foot a[...]
Article
L. G. Halsey, Auteur ; S. E. Wallace, Auteur ; A. J. Woakes, Auteur ; H. Winkler, Auteur ; P. J. Butler, AuteurWork against buoyancy during submergence is a large component of the energy costs for shallow diving ducks. For penguins, buoyancy is less of a problem, however they still seem to trade-off levels of oxygen stores against the costs and benefits [...]
