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Conservation status and limiting factors in the endangered population of Egyptian vulture (Neophron percnopterus) in the Canary Islands
Egyptian vulture populations have decreased sharply in the Western Palearctic; island populations are almost extinct in the Mediterranean and the Macaronesian regions. In the Canary archipelago, theExpand
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Offspring body condition and immunocompetence are negatively affected by high breeding densities in a colonial seabird: a multiscale approach
Why avian colonies vary in size and how food competition among nearby colonies affects offspring quality are still not completely understood. We simultaneously examined the effects of four scales ofExpand
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Determining Sex of Magellanic Penguins Using Molecular Procedures and Discriminant Functions
Abstract Magellanic Penguins (Spheniscus magellanicus) show little sexual dimorphism, and although males are usually larger than females, sexing by direct observation may be difficult, especially inExpand
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Desert locust outbreaks in the Sahel: resource competition, predation and ecological effects of pest control
Summary 1 The desert locust Schistocerca gregaria has been considered a major pest since ancient times, as locust swarms holding millions of insects move throughout the Sahel, northern Africa,Expand
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Survival in a long-lived territorial migrant: effects of life-history traits and ecological conditions in wintering and breeding areas
Despite its key role in population dynamics and evolutionary ecology, little is known about factors shaping survival in long-lived territorial species. Here, we assessed several hypotheses that mightExpand
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Use of European hare (Lepus europaeus) carcasses by an avian scavenging assemblage in Patagonia
We studied the use of European hare (Lepus europaeus) carcasses by avian scavengers in Argentinean Patagonia. A total of 16 hare carcasses were placed in locations that could be observed withoutExpand
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Long-Term Trends in Population Size and Breeding Success in the Egyptian Vulture (Neophron percnopterus) in Northern Spain
Abstract The Egyptian Vulture (Neophron percnopterus) is considered a globally endangered avian scavenger. In the 1980s, Bardenas Reales Natural Park in northern Spain held the densest populations inExpand
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ROOST-TREE CHARACTERISTICS FOOD HABITS AND SEASONAL ABUNDANCE OF ROOSTING EGYPTIAN VULTURES IN NORTHERN SPAIN
--Six Egyptian Vulture (Neophron percnopterus) communal roosts were discovered in northern Spain between 1986-1988. The maximum number of Egyptian Vultures observed varied between 8 and 138 (• = 55).Expand
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Effects of sex-associated competitive asymmetries on foraging group structure and despotic distribution in Andean condors
Abstract Phenotype-limited interference models assume competitive asymmetries among conspecifics and unequal sharing of resources. Their main prediction is a correlation between dominance status andExpand
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