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Auteur BERTRAN Joan |
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MARGALIDA Antoni, Auteur ; BERTRAN Joan, Auteur |Dans Ardeola (42 (2))We studied the diet of a pair of Bearded Vultures during the breeding season, as well as their selection of food regarding the carcasses theoretically available within the home range of the pair. The methodology used was based on direct observat[...]Article : texte imprimé
MARGALIDA Antoni, Auteur ; BERTRAN Joan, Auteur |Dans Ardeola (51 (2))The difference in size between both species, and the type of food affected the Ravens’ parasitic efficiency. For the Bearded Vultures, the negative effects of coexisting with the Ravens are associated with the energetic costs derived from nest [...]Article : texte imprimé
MARGALIDA Antoni, Auteur ; BERTRAN Joan, Auteur |Dans Ardea (88 (2), 2000)Bearded Vultures Gypaetus barbatus began supplying material to their nests on average 111 d (range 91-126 d) prior to laying . Males were signifr icantly more active that females. Heavy material (branches) was transported indistinctly in the tal[...]