A5043194800- Avian ecology and behavior
- Wildlife Ecology and Conservation
- Animal Behavior and Reproduction
- Animal Ecology and Behavior Studies
- Bird parasitology and diseases
- Plant and animal studies
- Historical and socio-economic studies of Spain and related regions
- Ecology and Vegetation Dynamics Studies
- Finance, Taxation, and Governance
- Wildlife-Road Interactions and Conservation
- Species Distribution and Climate Change
- Wildlife Conservation and Criminology Analyses
- Isotope Analysis in Ecology
- Demographic Trends and Gender Preferences
- Rabbits: Nutrition, Reproduction, Health
- Animal and Plant Science Education
- Genetic diversity and population structure
- Fish Ecology and Management Studies
- Climate Change, Adaptation, Migration
- Marine animal studies overview
- Vector-borne infectious diseases
- Economic and Environmental Valuation
- Mercury impact and mitigation studies
- Amphibian and Reptile Biology
- Forest Biomass Utilization and Management
Universidad de Navarra
2023
Infraestruturas de Portugal (Portugal)
2015
Estación Biológica de Doñana
1990-2010
Consejo Superior de Investigaciones Científicas
2001-2010
University of Saskatchewan
2001-2009
Mediterranean Institute for Advanced Studies
2009
Despite its key role in population dynamics and evolutionary ecology, little is known about factors shaping survival long-lived territorial species. Here, we assessed several hypotheses that might explain variability a migratory Spanish of species, the Egyptian vulture Neophron percnopterus, using 16-year monitoring period live-encounter histories 835 individually marked birds. Cormack-Jolly-Seber capture-recapture models showed no evidence for effects sex or nestling body condition on...
Abstract Understanding the factors underlying species coexistence is a major focus in community ecology. When dealing with competition between native and exotic species, competitive exclusion of ‘weaker’ can have consequences for biodiversity conservation. We examined interspecific interactions during foraging black vultures Coragyps atratus Andean condors Vultur gryphus Southern Argentina. Previous studies suggest facilitatory them. However, most parts their distribution ranges, these did...
Individual dietary variation has important ecological and evolutionary consequences. However, it been overlooked in many taxa that are thought to have homogeneous diets. This is the case of vultures, considered merely as ‘carrion eaters’. Given their high degree sociality, vultures an excellent model investigate how inter-individual transmissible behaviours drive individual variation. Here, we combine GPS-tracking accelerometers with exhaustive fieldwork campaign identify diet 55 griffon (...
Why avian colonies vary in size and how food competition among nearby affects offspring quality are still not completely understood. We simultaneously examined the effects of four scales breeding density on two measures viability (body condition T–cell–mediated immunity) colonial Magellanic penguin. Body fledglings was inversely correlated with within 100 m2 nests, decreased increasing numbers pairs competing parental foraging ranges (100 km), probably as a result density–dependent...
Summary The desert locust Schistocerca gregaria has been considered a major pest since ancient times, as swarms holding millions of insects move throughout the Sahel, northern Africa, Middle East and southern Mediterranean countries. Most research focused on biology species development strategies in control, but little is known about place pulses within food webs which domestic herbivores European long‐distance migratory birds are also involved. We evaluated role outbreaks Sahelian region....
In long-lived species, the age-, stage- and/or sex-dependent patterns of survival and reproduction determine evolution life history strategies, shape reproductive value, ultimately population dynamics. We evaluate combined effects age sex in recruitment, breeder breeding success globally endangered Egyptian vulture (Neophron percnopterus), using 31-years exhaustive data on marked individuals Spain. Mean first was 7-yrs for both sexes, but females showed an earlier median a larger variance...
The inclusion of perceptions, interests and needs stakeholders in biodiversity conservation is critical for the long-term protection endangered species. Yet, social dimensions species are often overlooked. We examined perceptions conservational importance globally Egyptian vulture (Neophron percnopterus) one most important breeding areas worldwide: Bardenas Reales Protected Area, northern Spain. assessed factors that influence stakeholders' views its identified management strategies would...
Summary It is widely acknowledged that the conservation of vultures, a group birds threatened worldwide, requires management safe, high-quality human subsidies, free potentially harmful toxic compounds. Additionally, in Europe, supply livestock carcasses subject to current sanitary regulations. largely unknown how vultures use sources food different abundance, predictability, or legal status and individual features shape these preferences. To answer questions, we took advantage information...
Magellanic Penguins (Spheniscus magellanicus) show little sexual dimorphism, and although males are usually larger than females, sexing by direct observation may be difficult, especially in the case of chicks. In this paper we evaluate utility four different PCR-based sex determination techniques using genomic DNA for Penguins. We found that primer set designed Collared Flycatcher (Ficedula albicollis) also provided a reliable, simple convenient procedure Additionally, obtained discriminant...
Natal dispersal, the movement between birth and first breeding site, has been rarely studied in long-lived territorial birds with a long-lasting pre-breeding stage. Here we benefited from long-term monitoring programs of six populations Egyptian vultures (Neophron percnopterus) Spain France to study how rearing environment determines dispersal. For 124 vultures, recorded median dispersal distance 48 km (range 0-656 km). Linear models were used assess effect population individual traits on at...
Abstract Restoration of demised keystone-species populations is an overriding concern in conservation biology. However, since no population independent its environment, progress needed predicting the efficacy restoration unstable ecological contexts. Here, by means Population Dynamics P-system Models (PDP), we studied long-term changes size Egyptian vultures ( Neophron percnopterus ) inhabiting a Natural Park, northern Spain, to numbers wild rabbits Oryctolagus cuniculus ), Mediterranean...
Abstract We studied the use of European hare ( Lepus europaeus ) carcasses by avian scavengers in Argentinean Patagonia. A total 16 were placed locations that could be observed without disturbing birds feeding on them. Six species fed these carcasses: chimango caracara Milvago ), crested Polyborus plancus black vulture Coragyps atratus grey eagle‐buzzard Geranoaetus melanoleucus red‐backed hawk Buteo polyosoma and cinereous harrier Circus cinereus ). Turkey vultures Cathartes aura although...
Despite the interest in blood chemistry for studying ecological and pathological characteristics of birds, sources variability such as age captivity are poorly understood, reference values usually obtained from adult captive birds. We determined 15 plasma chemical variables 164 free-living Egyptian Vultures (Neophron percnopterus) three groups (nestlings, subadults, adults), 9 adults. Free-living subadults adults exhibited identical values. Nestlings had significantly higher levels...
We examined within-pair sexual dimorphism and phenotypic assortative mating in Magellanic penguins (Spheniscus magellanicus) breeding six colonies located on the Patagonian coast (Argentina). All measured traits except number of pectoral spots differed between sexes; bill depth flipper length were most least dimorphic traits, respectively. found by body mass. The similarity condition within pairs was close to significant. When we performed separate correlations for birds that bred...
Fil: Jovani, Roger. Consejo Superior de Investigaciones Cientificas. Estacion Biologica Donana; Espana
Etude comparative des compositions en âge et sexe de populations sauvages lapin celles du regime alimentaire Grand Duc. Par capture lapins (piegage) par analyse pelotes rejections Grands Ducs (analyse morphologique biometrique), les auteurs montrent que le Duc selectionne deux types proies fonction periodes l'annee type milieu. Les discutent facteurs intervenant dans cette selection
The Egyptian Vulture (Neophron percnopterus) is considered a globally endangered avian scavenger. In the 1980s, Bardenas Reales Natural Park in northern Spain held densest populations Europe. There, population of wild rabbit (Oryctolagus cuniculus), main prey this vulture, decreased dramatically after arrival hemorrhagic disease (RHD) 1989, and did not recover. We monitored Vultures from 1989–2007. During study period, number breeding territories 56 to 26 (−54%). contrast, percentage...