A5034010811- Avian ecology and behavior
- Marine animal studies overview
- Marine and fisheries research
- Animal Behavior and Reproduction
- Wildlife Ecology and Conservation
- Arctic and Antarctic ice dynamics
- Isotope Analysis in Ecology
- Fish Ecology and Management Studies
- Marine and coastal plant biology
- Coral and Marine Ecosystems Studies
- Plant and animal studies
- Cryospheric studies and observations
- Species Distribution and Climate Change
- Rangeland and Wildlife Management
- Animal Ecology and Behavior Studies
- Atmospheric and Environmental Gas Dynamics
- Physiological and biochemical adaptations
- Influenza Virus Research Studies
- Coastal and Marine Management
- Winter Sports Injuries and Performance
- Climate variability and models
- Animal Virus Infections Studies
- Viral Infections and Vectors
- Animal Vocal Communication and Behavior
- International Maritime Law Issues
Point Blue Conservation Science
2017-2024
École Pratique des Hautes Études
2014-2021
Université Paul-Valéry Montpellier
2014-2021
Centre National de la Recherche Scientifique
2010-2021
Centre d'Écologie Fonctionnelle et Évolutive
2013-2021
Université de Montpellier
2014-2021
Université de Rennes
2010-2015
Territoires
2013-2014
Centre d'Etudes Biologiques de Chizé
2005-2013
Institut National des Sciences Appliquées de Rennes
2011
Colonial breeding is widespread among animals. Some, such as eusocial insects, may use agonistic behavior to partition available foraging habitat into mutually exclusive territories; others, seabirds, do not. We found that northern gannets, satellite-tracked from 12 neighboring colonies, nonetheless forage in largely areas and these colony-specific home ranges are determined by density-dependent competition. This segregation be enhanced individual-level public information transfer, leading...
Unmanned aerial vehicles, commonly called drones, are being increasingly used in ecological research, particular to approach sensitive wildlife inaccessible areas. Impact studies leading recommendations for best practices urgently needed. We tested the impact of drone colour, speed and flight angle on behavioural responses mallards Anas platyrhynchos a semi-captive situation, wild flamingos ( Phoenicopterus roseus ) common greenshanks Tringa nebularia wetland area. performed 204 flights with...
Consistent intra‐population variability in foraging behaviour is found among a wide range of taxa. Such specialisations are common marine vertebrates, yet it not clear how individuals repeatedly locate prey or sites at ocean‐wide scales. Using GPS and time‐depth loggers we studied the fine‐scale central‐place northern gannets Morus bassanus two large colonies. First, estimated degree consistency individual routes across repeated trips. Second, tested for differences searching response to...
1. Heterogeneity in individual quality (i.e. individuals having different performance levels that are consistent throughout life) can drive the demography of iteroparous species, but context environmental variability has rarely been evaluated. 2. We investigated demographic responses a long-lived seabird, Adélie penguin (Pygoscelis adeliae), to contrasting conditions as function reproductive success, breeding (BQ) and experience. A continuous index BQ (BQI) was developed reflect an...
In animal populations, a minority of individuals consistently achieves the highest breeding success and therefore contributes most recruits to future generations. On average, foraging performance is important in determining at population level, but evidence scarce show that more successful breeders (better breeders) forage differently than less ones (poorer breeders). To test this hypothesis, we used 10‐year, three‐colony, individual‐based longitudinal data set on parameters long‐lived bird,...
Abstract Investigations in recent years of the ecological structure and processes Southern Ocean have almost exclusively taken a bottom-up, forcing-by-physical-processes approach relating various species' population trends to climate change. Just 20 ago, however, researchers focused on broader set hypotheses, part formed around paradigm positing interspecific interactions as central structuring ecosystem (forcing by biotic processes, top-down), particularly “krill surplus” caused removal...
When animals move across a landscape, they alternate between active searching phases in areas with high prey density and commuting towards in-between profitable feeding patches. Such movements are more sinuous than travelling movements, supposedly costly energy. Here we provide an empirical validation of this long-lasting assumption. To end, evaluated simultaneously energy expenditure trajectory northern gannets (Morus bassanus) using GPS loggers, dive recorders three-dimensional...
Upwelling regions are highly productive habitats targeted by wide-ranging marine predators and industrial fisheries. In this study, we track the migratory movements of eight seabird species from across Atlantic; quantify overlap with Canary Current Large Marine Ecosystem (CCLME) determine habitat characteristics that drive association. Our results indicate CCLME is a biodiversity hotspot for seabirds; all tracked more than 70% individuals used upwelling region. Relative richness peaked in...
Abstract Evaluating the fitness of organisms is an essential step towards understanding their responses to environmental change. Connections between energy expenditure and have been postulated for nearly a century. However, testing this premise among wild animals constrained by difficulties in measuring while simultaneously monitoring conventional metrics such as survival reproductive output. We addressed issue exploring functional links field metabolic rate ( FMR ), body condition, sex, age...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 302:245-261 (2005) - doi:10.3354/meps302245 Foraging under contrasting oceanographic conditions: gentoo penguin at Kerguelen Archipelago Amélie Lescroël*, Charles-André Bost Centre d'Etudes Biologiques de Chizé, CNRS, UPR 1934, 79360 Villiers en Bois, France *Email: lescroel@cebc.cnrs.fr ABSTRACT: Coastal...
In the context of predicted alteration sea ice cover and increased frequency extreme events, it is especially timely to investigate plasticity within Antarctic species responding a key environmental aspect their ecology: variability. Using 13 years longitudinal data, we investigated effect concentration (SIC) on foraging efficiency Adélie penguins (Pygoscelis adeliae) breeding in Ross Sea. A ‘natural experiment’ brought by exceptional presence giant icebergs during 5 consecutive provided...
The family Papillomaviridae contains more than 320 papillomavirus types, with most having been identified as infecting skin and mucosal epithelium in mammalian hosts. To date, only nine non-mammalian papillomaviruses have described from birds (n = 5), a fish 1), snake turtles 2). identification of sauropsids sparid suggests that early ancestors were already the earliest Euteleostomi. Euteleostomi clade includes 90 per cent living vertebrate species, progeny virus could passed on to all...
Abstract For land-breeding marine organisms such as seabirds, knowledge about their habitat use has mainly been gained through studies of breeding individuals that are constrained to return frequently grounds. In this study we set out measure whether: a) selection in the non-breeding period predicts period, and b) whether concentrated activity on closest suitable habitats. Macaroni Eudyptes chrysolophus gentoo Pygoscelis papua penguins, two predators with contrasting foraging strategies,...
Within a single animal species, different morphs can allow for differential exploitation of foraging niches between populations, while sexual size dimorphism provide each sex with access to resources. Despite being potentially important agents evolution, resource polymorphisms, and the way they operate in wild remain poorly understood. In this study, we examine how trophic factors select body sizes populations sexes diving endotherm. Dive depth duration are positively related birds mammals,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 601:239-251 (2018) - DOI: https://doi.org/10.3354/meps12687 Post-fledging survival of Adélie penguins at multiple colonies: chicks raised on fish do well David G. Ainley1,*, Katie M. Dugger2, Mario La Mesa3, Grant Ballard4, Kerry J. Barton5, Scott Jennings2,4,6, Brian Karl5, Amelie Lescroël4, Phil O’B....
Abstract Seabirds and fisheries have been interacting from ancient times, sometimes with mutual benefits: provided fishermen visual cues of fish aggregations, also fed upon food subsids generated by fishing activities. Yet seabirds may compete for the same resources, their interactions can lead to additional seabird mortality through accidental bycatch diminishing efficiency, threatening vulnerable populations. Understanding these complex relationships is essential conservation strategies,...
Sex-related differences in vital rates that drive population change reflect the basic life history of a species. However, for visually monomorphic bird species, determining effect sex on demographics can be challenge. In this study, we investigated apparent survival, recruitment, and breeding propensity Adélie penguin (
The current highly pathogenic avian influenza H5N1 panzootic is having substantial impacts on wild birds and marine mammals. Following major widespread outbreaks in South America, an incursion to Antarctica occurred late the austral summer of 2023/2024 was confined region Antarctic Peninsula. To infer potential underlying processes, we compiled surveillance data from sub-Antarctic Islands prior first confirmed cases.
We investigated central place foraging (CPF) in the context of optimal theory Adélie penguins Pygoscelis adeliae southern Ross Sea by using satellite tracking and time‐depth recorders to explore at two spatio‐temporal scales: within day‐to‐day (sub‐mesoscale: single trip, 10s km 2 ) entire breeding season (mesoscale: trips multiple individuals across collective area, 100s ). Specifically, we examine whether three basic assumptions Orians–Pearson CPF model, shown occur other species, are met:...
Abstract The juvenile phase is poorly known in Antarctic seabirds, despite being a critical period for individual survival. To better understand the ecology of young we surveyed first time three-dimensional habitat use six emperor penguins during their post-natal dispersal from Terre Adélie, using bio-telemetric tags. tags transmitted location and activity data nearly 100 days on average. One was followed eight months covered 7000 km, which represents longest continuous survey species....