Roger Pradel
Centre national de la recherche scientifique
EcologyPopulationMark and recaptureBiological dispersalBiology
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Publications 190
#1Sarah CubaynesH-Index: 12
#2Jon AarsH-Index: 31
Last. Olivier Gimenez (CNRS: Centre national de la recherche scientifique)H-Index: 44
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O_LIIn species providing extended parental care, one or both parents care for altricial young over a period including more than one breeding season. We expect large parental investment and long-term dependency within family units to cause high variability in life trajectories among individuals with complex consequences at the population level. So far, models for estimating demographic parameters in free-ranging animal populations do not include extended parental care, thereby limiting our unders...
#1Anita Jeyam (UKC: University of Kent)H-Index: 1
#2Rachel S. McCrea (UKC: University of Kent)H-Index: 10
Last. Roger PradelH-Index: 49
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Multistate capture-recapture models are a useful tool to help to understand the dynamics of movement within discrete capture-recapture data.The standard multistate capture-recapture model, however, relies on assumptions of homogeneity within the population with respect to survival, capture and transition probabilities. There are many ways in which this model can be generalized so some guidance on what is really needed is highly desirable. Within the paper we derive a new test that can detect het...
1 CitationsSource
#2Pierre-Yves HenryH-Index: 23
Last. Roger PradelH-Index: 49
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On their journey to wintering or breeding sites, migratory birds usually alternate between migratory flights and stopovers where they rest and refuel. Actually, migrating birds spend most of the time at stopovers. Consequently, selection to minimize total time spent on migration likely operates mainly on the effectiveness of stopover rest and refueling. Departure probability from stopover sites depends both on weather conditions and fuel stores, but their respective role has not been quantified....
#1Rune Skjold Tjørnløv (AU: Aarhus University)H-Index: 4
#2Roger Pradel (University of Montpellier)H-Index: 49
Last. Morten Frederiksen (AU: Aarhus University)H-Index: 34
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: Harvested species population dynamics are shaped by the relative contribution of natural and harvest mortality. Natural mortality is usually not under management control, so managers must continuously adjust harvest rates to prevent overexploitation. Ideally, this requires regular assessment of the contribution of harvest to total mortality and how this affects population dynamics.To assess the impact of hunting mortality on the dynamics of the rapidly declining Baltic/Wadden Sea population of...
#1Dorine Y. M. Jansen (UCT: University of Cape Town)H-Index: 2
#2Roger Pradel (University of Montpellier)H-Index: 49
Last. Res Altwegg (UCT: University of Cape Town)H-Index: 32
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Climate models forecast increasing climatic variation and more extreme events, which could increase the variability in animal demographic rates. More variable demographic rates generally lead to lower population growth and can be detrimental to wild populations, especially if the particular demographic rates affected are those to which population growth is most sensitive. We investigated the population dynamics of a metapopulation of 25 colonies of a semi-arid bird species, the sociable weaver P...
#1W. Chris Oosthuizen (Mammal Research Institute)H-Index: 10
#2Martin Postma (Mammal Research Institute)H-Index: 5
Last. P J Nico de Bruyn (Mammal Research Institute)H-Index: 1
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1 CitationsSource
#1Loreleï GuéryH-Index: 3
#2Sébastien DescampsH-Index: 21
Last. Joël BêtyH-Index: 35
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Mid-latitude atmospheric variability is mainly driven by a type of cyclone, the extra-tropical cyclones (ETCs) that have a primary role in determining local weather and its variation, inducing strong winds, precipitation, and temperature changes. ETCs have a broad range of intensities, from benign to extreme, and their paths, frequency and intensity may change with global warming. However, how ETCs, and cyclones in general, currently affect marine wildlife is poorly studied and remains substanti...
espanolA traves de modelos de captura, marcaje y recaptura (CMR) se puede estimar la probabilidad de supervivencia en poblaciones naturales. Sin embargo, cuando las sesiones de captura estan espaciadas de manera desigual, los modelos dependientes de la edad pueden producir estimaciones erroneas de la supervivencia si los individuos cambian de clase de edad durante el intervalo entre dos sesiones de captura. Proponemos una solucion para corregir el desajuste entre los intervalos de tiempo y la du...
3 CitationsSource
#1Meritxell Genovart (CSIC: Spanish National Research Council)H-Index: 23
#2Roger Pradel (University of Montpellier)H-Index: 49
Capture–recapture (CR) models are an essential tool for estimating demographic parameters in most animal and some plant populations. To avoid drawing incorrect conclusions in any statistical inference, a crucial prerequisite is to assess the goodness of fit of a general model to the data. In CR models, a frequent cause of lack of fit, is the so-called transience effect, which is due to a lower expectation of re-observation of individuals marked for the first time as compared to other individuals...
#1Dimas Gianuca (University of Exeter)H-Index: 5
#2Stephen C. Votier (University of Exeter)H-Index: 37
Last. Richard A. Phillips (NERC: Natural Environment Research Council)H-Index: 51
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1. Many animal taxa exhibit sex-specific variation in ecological traits, such as foraging and distribution. These differences could result in sex-specific responses to change, but such demographic effects are poorly understood. 2. Here, we test for sex-specific differences in the demography of northern (NGP, Macronectes halli) and southern (SGP, M. giganteus) giant petrels-strongly sexually size-dimorphic birds that breed sympatrically at South Georgia, South Atlantic Ocean. Both species feed at...
6 CitationsSource