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Documents disponibles écrits par cet auteur (9)
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Article
Guy Beauchamp, AuteurAnnual survival is a key demographic trait influencing population growth and viability. Variability among species in annual survival tends to reflect different life history trajectories. In adult birds, greater annual survival has been shown to [...]
Article
Guy Beauchamp, AuteurColonial breeding is a common breeding system in many avian species. Its ubiquity suggests that in the evolutionary past various benefits associated with colonial breeding often outweighed the potential costs. I have investigated the association[...]
Article
Emilio Pagani‐Núñez, Auteur ; Xue Xia, Auteur ; Guy Beauchamp, Auteur ; Ruchuan He, Auteur ; John H. D. Husson, Auteur ; Dan Liang, Auteur ; Eben Goodale, AuteurWhat structures the organization of mixed-species bird flocks, so that some ‘nuclear’ species lead the flocks, and others follow? Previous research has shown that species actively listen to each other, and that leaders are gregarious; such grega[...]
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Guy Beauchamp, AuteurDans Wildfowl (51 2000)Post-hatch brood amalgamation was examined in the Common Eider (Somateria mollissima) along the shorelines of the St. Lawrence estuary, Quebec, Canada. Broods typically contained a large number of ducklings and several females in attendance. The[...]
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Guy Beauchamp, AuteurAs the sun gradually lowers over the horizon, prey species with more sun in their eyes should have more difficulty in visually monitoring their surroundings for threats and thus experience a higher predation risk. In a unique setting, I could ex[...]
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Flock size and human disturbance affect vigilance of endangered red-crowned cranes (Grus japonensis)
Zhi Wang, Auteur ; Zhongqiu Li, Auteur ; Guy Beauchamp, Auteur ; Zhigang Jiang, AuteurVigilance is used to detect predators and monitor rivals. We studied red-crowned cranes (Grus japonensis) in Yancheng Biosphere Reserve, China, to examine changes in the allocation of time to vigilance as a function of flock size in areas with d[...]
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Eben Goodale, Auteur ; Guy Beauchamp, AuteurAmong the various species that form mixed-species bird flocks, "nuclear species" are thought to be important in flock formation and maintaining flock cohesion. Such nuclear species have been noted to occur in large groups on their own and to lea[...]
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Zhongqiu Li, Auteur ; Guy Beauchamp, Auteur ; Michael S. Mooring, AuteurRelaxed selection following extirpation of predators or as a consequence of captive breeding may result in the loss of adaptive antipredator behavior. We propose that it is equally possible for relaxed selection to result in the loss or reduced [...]
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Guy Beauchamp, AuteurVisual obstructions can cause an increase in antipredator vigilance in prey animals by making predator detection more difficult. However, visual obstructions can also skew the perception of group size and inter-individual distances and impair th[...]
