Search Results - "Donázar, J.A"

Long-term anthropogenic drivers of diet composition and niche breadth in an endangered avian scavenger: The scant role of sanitary regulations by De Tena, C., Donázar-Aramendía, I., Ceballos, O., Arrondo, E., Cortés-Avizanda, A., Donázar, J.A.

“…The widespread and accelerated transformation experienced by our planet results in populations of endangered species having to survive in highly-altered…”
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Levels of polychlorinated biphenyls and organochlorine pesticides in serum samples of Egyptian Vulture ( Neophron percnopterus) from Spain by Gómara, B., Ramos, L., Gangoso, L., Donázar, J.A., González, M.J.

“…Concentrations of 23 polychlorinated biphenyls (PCBs), p, p ′-DDT and two of its metabolites, p, p ′-DDE and p, p ′-TDE have been measured in serum samples of…”
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Genetically distinct island populations of the Egyptian vulture (Neophron percnopterus) by Kretzmann, Maria B, Capote, N, Gautschi, B, Godoy, J.A, Donázar, J.A, Negro, J.J

“…The Egyptian vulture (Neophron percnopterus) is a species in decline throughout Europe, with the largest remaining breeding populations found in northern…”
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Levels of persistent organic pollutants (POPs) and the role of anthropic subsidies in the diet of avian scavengers tracked by stable isotopes by Muñoz-Arnanz, J., Cortés-Avizanda, A., Donázar-Aramendía, I., Arrondo, E., Ceballos, O., Colomer-Vidal, P., Jiménez, B., Donázar, J.A.

“…Persistent Organic Pollutants (POPs) have been identified as a significant factor driving declines in wildlife populations. These contaminants exhibit a dual…”
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Avian scavengers living in anthropized landscapes have shorter telomeres and higher levels of glucocorticoid hormones by Gangoso, L., Cortés-Avizanda, A., Sergiel, A., Pudifoot, B., Miranda, F., Muñoz, J., Delgado-González, A., Moleón, M., Sánchez-Zapata, J.A., Arrondo, E., Donázar, J.A.

“…Habitat anthropization is a powerful stressor affecting the health and fitness of organisms, ultimately impacting their population dynamics. In vertebrates,…”
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Epizootics and sanitary regulations drive long-term changes in fledgling body condition of a threatened vulture by Donázar, J.A., Cortés-Avizanda, A., Ceballos, O., Arrondo, E., Grande, J.M., Serrano, D.

“…[Display omitted] •Rabbit epizootic and sanitary regulations reduced food resources for vultures.•Fledging body mass respond to anthropogenic-induced changes…”
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Blood lead levels in an endangered vulture decline following changes in hunting activity by Gangoso, L., Mateo, R., Santamaría-Cervantes, C., García-Alfonso, M., Gimeno-Castellano, C., Arrondo, E., Serrano, D., van Overveld, T., de la Riva, M., Cabrera, M.A., Donázar, J.A.

“…Lead ammunition stands out as one of the most pervasive pollutants affecting wildlife. Its impact on bird populations have spurred efforts for the phase-out of…”
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Winners and losers in human-made habitats: interspecific competition outcomes in two Neotropical vultures by Carrete, M, Lambertucci, S.A, Speziale, K, Ceballos, O, Travaini, A, Delibes, M, Hiraldo, F, Donázar, J.A

“…Understanding the factors underlying species coexistence is a major focus in community ecology. When dealing with competition between native and exotic…”
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Spatial and temporal patterns in the diet of the Andean condor: ecological replacement of native fauna by exotic species by Lambertucci, S.A, Trejo, A, Di Martino, S, Sánchez-Zapata, J.A, Donázar, J.A, Hiraldo, F

“…The development of conservation strategies to protect viable populations of scavenging birds requires the existence of adequate and safe food supplies in the…”
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Large-scale human effects on an arid African raptor community by Anadón, J.D, Sánchez-Zapata, J.A, Carrete, M, Donázar, J.A, Hiraldo, F

“…In the current scenario of biodiversity crisis there is a growing need for identifying causes of changes in biodiversity at large scales. Here we assess…”
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Density-dependent productivity depression in Pyrenean bearded vultures: implications for conservation by Carrete, Martina, Donázar, José A., Margalida, Antoni

“…The main objective of many conservation programs is to increase population size by improving a species' survival and reproduction. However, density dependence…”
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Food habits of the Crested Caracara (Caracara plancus) in the Andean Patagonia: the role of breeding constraints by Travaini, A., Donázar, J.A., Ceballos, O., Hiraldo, F.

“…Crested caracara (Caracara plancus) in Patagonia have a generalist diet, feeding mainly on mammalian carrion and arthropods. Vertebrate prey (mammals, birds…”
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Coping with uncertainty: breeding adjustments to an unpredictable environment in an opportunistic raptor by Sergio, Fabrizio, Blas, J., López, L., Tanferna, A., Díaz-Delgado, R., Donázar, J. A., Hiraldo, F.

“…No environment is truly constant in time. As a result, animals have evolved multiple adjustments to cope with such fluctuations. However, the allocation of…”
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Can interspecific competition and nest site availability explain the decrease of lesser kestrel Falco naumanni populations? by Forero, M.G., Tella, J.L., Donázar, J.A., Hiraldo, F.

“…The population decline of the lesser kestrel, a globally threatened species, has been sometimes explained on the basis of interspecific competition and lack of…”
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Conflicts between Lesser Kestrel conservation and European agricultural policies as identified by habitat use analyses by Tella, J.L, Forero, M.G, Hiraldo, F, Donazar, J.A

“…European pseudo-steppes have suffered from extensive changes in agricultural practices during the past decades with the disappearance of field margins and…”
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DNA fingerprinting reveals a low incidence of extra-pair fertilizations in the lesser kestrel by NEGRO, J.J., VILLARROEL, M., TELLA, J.L., KUHNLEIN, U., HIRALDO, F., DONAZAR, J.A., BIRD, D.M.

“…DNA fingerprinting of socially monogamous, colonially breeding lesser kestrels, Falco naumanni, revealed that three of 87 (3.4%) nestlings were illegitimate,…”
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Espaciamiento y dispersión de nidos de Búho Real (Bubo bubo) en Navarra (Norte de la Península Ibérica) by DONAZAR, J.A.

“…En Navarra (norte de la Península Ibérica) la distancia entre   nidos de Bubo bubo está inversamente correlacionada con la   abundancia de Oryctolagus…”
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Selección del lugar de nidificación por el Alimoche (Neophron percnopterus) en Navarra by CEBALLOS, O., DONAZAR, J.A.

“…Se han observado 77 nidos de Alimoche (Neophron percnopterus) correspondientes a 75 parejas de las 140 censadas en el área de estudio. Los nidos se sitúan…”
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