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Olivier Gimenez
Centre national de la recherche scientifique
193Publications
39H-index
5,017Citations
Publications 193
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#1Marlène Gamelon (NTNU: Norwegian University of Science and Technology)H-Index: 10
#2Eric BaubetH-Index: 14
Last.Olivier Gimenez (CNRS: Centre national de la recherche scientifique)H-Index: 39
view all 8 authors...
Many populations are affected by hunting or fishing. Models designed to assess the sustainability of harvest management require accurate estimates of demographic parameters (e.g. survival, reproduction) hardly estimable with limited data collected on exploited populations. The joint analysis of different data sources with integrated population models (IPM) is an optimal framework to obtain reliable estimates for parameters usually difficult to estimate, while accounting for imperfect detection a...
#1Tangi Le Bot (University of Montpellier)H-Index: 2
#2Amelie Lescroel (Point Blue Conservation Science)H-Index: 1
Last.David Grémillet (University of Montpellier)H-Index: 46
view all 7 authors...
Abstract Fisheries modify ecosystem balance by harvesting through marine food webs and producing large amounts of discards subsidizing scavengers. Among them, seabirds are the most conspicuous and have been benefiting from anthropogenic food sources generated by fisheries. However, this modified feeding behaviour also exposes them to threats, such as accidental bycatch on fishing gear and ecological traps set by discards of lower nutritional value compared to seabird natural prey. Seabird-fisher...
Inferring interactions between populations of different species is a challenging statistical endeavour, which requires a large amount of data. There is therefore some incentive to combine all available sources of data into a single analysis to do so. In demography and single-population studies, Integrated Population Models combine population counts, capture-recapture and reproduction data to fit matrix population models. Here, we extend this approach to the community level in a stage-structured ...
#1A.‐S. Bonnet‐Lebrun (University of Montpellier)
#2Alexandros A. Karamanlidis (NMBU: Norwegian University of Life Sciences)H-Index: 15
Last.Olivier Gimenez (University of Montpellier)H-Index: 39
view all 5 authors...
#1Cyril Milleret (NMBU: Norwegian University of Life Sciences)H-Index: 4
#2Pierre Dupont (NMBU: Norwegian University of Life Sciences)H-Index: 1
Last.Richard Bischof (NMBU: Norwegian University of Life Sciences)H-Index: 19
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The estimation of population size remains one of the primary goals and challenges in ecology and provides a basis for debate and policy in wildlife management. Despite the development of efficient non-invasive sampling methods and robust statistical tools to estimate abundance, maintenance of field sampling is still subject to economic and logistic constraints. These can result in intentional or unintentional interruptions in sampling and cause gaps in data time series, posing a challenge to abu...
#1Olivier Gimenez (University of Montpellier)H-Index: 39
#2Olivier Gimenez (University of Montpellier)H-Index: 10
Last.Enrique A. Crespo (CONICET: National Scientific and Technical Research Council)H-Index: 25
view all 7 authors...
Abstract Social network analysis provides a powerful tool for understanding social organisation of animals. However, in free-ranging populations, it is almost impossible to monitor exhaustively the individuals of a population and to track their associations. Ignoring the issue of imperfect and possibly heterogeneous individual detection can lead to substantial bias in standard network measures. Here, we develop capture-recapture models to analyse network data while accounting for imperfect and h...
#1Tamar Lok (University of Montpellier)
#2Chris J. HassellH-Index: 12
Last.Olivier Gimenez (University of Montpellier)H-Index: 39
view all 5 authors...
To successfully perform their long‐distance migrations, migratory birds require sites along their migratory routes to rest and refuel. Monitoring the use of so‐called stopover and staging sites provides insights into (a) the timing of migration and (b) the importance of a site for migratory bird populations. A recently developed Bayesian superpopulation model that integrates mark–recapture data and ring density data enabled the estimation of stopover timing, duration, and population size. Yet, t...
#1Dorinda Marie Folio (University of Montpellier)
#2Jon Aars (NPI: Norwegian Polar Institute)H-Index: 29
Last.Sarah Cubaynes (University of Montpellier)H-Index: 10
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Life-history theory predicts that females' age and size affect the level of maternal investment in current reproduction, balanced against the future reproductive effort, maintenance and survival. Using long-term (30 years) individual data on 193 female polar bears (Ursus maritimus), we assessed age- and size-specific variation on litter size. Litter size varied with maternal age, younger females had higher chances of losing a cub during their first months of life. Results suggest an improvement ...
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