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Article
R. P. Wilson, AuteurDans Ardea (89(1) 2001)Two methods for determining the movement of birds are discussed; Global Location Sensing (determination of position by consideration of day length and local timing of mid-day) and dead reckoning (calculation of routes by vectors). These art, exa[...]
Article
Agustina Gomez Laich, Auteur ; F. Quintana, Auteur ; E. L. C. Shepard, Auteur ; R. P. Wilson, AuteurIntersexual differences in the foraging behaviour have been examined in several seabird species, especially those exhibiting sexual size dimorphism. We studied intersex behavioural differences in the Imperial Cormorant (Phalacrocorax atriceps), [...]
Article
R. P. Wilson, Auteur ; R. Locca, Auteur ; J. A. Scolaro, Auteur ; S. Laurenti, Auteur ; J. Upton, Auteur ; H. Gallelli, Auteur ; E. Frere, Auteur ; P. Gandini, AuteurThe behaviour of Magellanic Penguins Spheniscus magellanicus commuting between their foraging areas and breeding areas in San Julian Bay, Argentina was studied to examine whether tidal rip currents affected travelling patterns. Although there wa[...]
Article
A. Simeone, Auteur ; G. Luna-Jorquera, Auteur ; R. P. Wilson, AuteurWe examined the thermo regulatory behaviour (TRB) of roosting Humboldt penguins (Spheniscus humboldti) in north central Chile during summer and winter, when ambient temperatures (T(a)) are most extreme. Each body posture was considered to repres[...]
Article
R. P. Wilson, Auteur ; M. A. M. Kierspel, Auteur ; J. A. Scolaro, Auteur ; S. Laurenti, Auteur ; J. Upton, Auteur ; H. Gallelli, Auteur ; E. Frere, Auteur ; P. Gandini, AuteurWe looked at the routes taken by Magellanic Penguins up the beach while moving between the sea and the colony at a breeding site in San Julian, Argentina. Birds swam parallel to the shore for a period before leaving the water to cross the beach [...]
Article
D. Gremillet, Auteur ; C. Chauvin, Auteur ; R. P. Wilson, Auteur ; Y. Le Maho, Auteur ; S. Wanless, AuteurThe great cormorant Phalacrocorax carbo is thought to have a wettable plumage, providing low body insulation during foraging. Great cormorants should thus be constrained by water temperatures, and show high energy requirements. Surprisingly, thi[...]
