A5056981941- Marine animal studies overview
- Mercury impact and mitigation studies
- Avian ecology and behavior
- Toxic Organic Pollutants Impact
- Per- and polyfluoroalkyl substances research
- Animal Behavior and Reproduction
- Wildlife Ecology and Conservation
- Arctic and Antarctic ice dynamics
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Species Distribution and Climate Change
- Isotope Analysis in Ecology
- Amphibian and Reptile Biology
- Gut microbiota and health
- Animal and Plant Science Education
- Ocean Acidification Effects and Responses
- Thyroid Disorders and Treatments
- Cardiovascular and Diving-Related Complications
- Plant and animal studies
- Cryospheric studies and observations
- Effects and risks of endocrine disrupting chemicals
- High Altitude and Hypoxia
- Animal Vocal Communication and Behavior
- Telomeres, Telomerase, and Senescence
- Pesticide and Herbicide Environmental Studies
Centre d'Etudes Biologiques de Chizé
2015-2025
La Rochelle Université
2014-2025
Centre National de la Recherche Scientifique
2013-2025
University of Liège
2023
Norwegian Polar Institute
2016-2020
Since the last Arctic Monitoring and Assessment Programme (AMAP) effort to review biological effects of exposure organohalogen compounds (OHCs) in biota, there has been a considerable number new effect studies. Here, we provide an update on state knowledge OHC, also include mercury, and/or associated key marine terrestrial mammal bird species as well fish by reviewing literature published since AMAP assessment 2010. We aimed at updating how single but combined health are or can be mixtures...
Mercury, a ubiquitous toxic element, is known to alter expression of sex steroids and impair reproduction across vertebrates but the mechanisms underlying these effects are not clearly identified. We examined whether contamination by mercury predicts probability skip in black-legged kittiwakes (Rissa tridactyla) from Svalbard. also manipulated endocrine system investigate mechanism this relationship. During pre-laying period, we injected exogenous GnRH (gonadotropin-releasing hormone) test...
Abstract Climate warming is rapidly altering marine ecosystems towards a more temperate state on the European side of Arctic. However, this “Atlantification” has rarely been confirmed, as long-term datasets Arctic organisms are scarce. We present 19-year time series (1982–2016) diet samples from black-legged kittiwakes an indicator changes in high ecosystem (Kongsfjorden, Svalbard). Our results highlight shift prey dominance until 2006 to mixed with contribution Atlantic fishes. Capelin,...
Top marine predators are effective tools to monitor bioaccumulative contaminants in remote oceanic environments. Here, we used the wide-ranging wandering albatross Diomedea exulans investigate potential geographical variations of contaminant transfer Southern Ocean. Blood concentrations 19 persistent organic pollutants and 14 trace elements were measured a large number individuals (N = 180) known age, sex breeding status from subantarctic Crozet Islands. Wandering albatrosses exposed wide...
Increasing levels of poly- and perfluorinated alkyl substances (PFASs) have recently been described in Arctic biota. These emerging are concern given their resistance to degradation metabolization. Some studies reported endocrine disrupting effects for some PFASs. However, there is a gap knowledge on the potential relationships between PFASs hormones mediating life-history trade-off reproduction survival, such as glucocorticoids. The aims this study were (1) describe concentrations plasma...
Summary Life‐history theory predicts that long‐lived organisms should reduce parental effort under inclement environmental conditions in order to favour long‐term survival. Seabirds are top predators often exposed endocrine disrupting chemicals such as mercury (Hg). Hg‐contaminated birds show disrupted behaviour. Avian behaviour is governed by two key hormones birds: corticosterone ( CORT , a glucocorticoid hormone) and prolactin PRL pituitary hormone involved care). Any disruption of these...
Abstract There is growing evidence from experimental and human epidemiological studies that many pollutants can disrupt lipid metabolism. In Arctic wildlife, the occurrence of such compounds could have serious consequences for seasonal feeders. We set out to study whether organohalogenated (OHCs) cause disruption energy metabolism in female polar bears ( Ursus maritimus ) Svalbard, Norway (n = 112). analyzed biomarkers including abundance profiles nine lipid-related genes, fatty acid (FA)...
We monitored concentrations of per- and polyfluoroalkyl substances (PFASs) in relation to climate-associated changes feeding habits food availability polar bears (Ursus maritimus) arctic foxes (Vulpes lagopus) (192 plasma 113 liver samples, respectively) sampled from Svalbard, Norway, during 1997-2014. PFASs became greater with increasing dietary trophic level, as consumed more marine opposed terrestrial food, the sea ice habitat increased. Long-chained perfluoroalkyl carboxylates (PFCAs)...
Variation in space-use is common within mammal populations. In polar bears, Ursus maritimus, some individuals follow the sea ice (offshore bears) whereas others remain nearshore yearlong (coastal bears). We studied pollutant exposure relation to patterns vs coastal) adult female bears from Barents Sea equipped with satellite collars (2000–2014, n = 152). First, we examined differences home range (HR) size and position, body condition, diet proxies (nitrogen carbon stable isotopes, 116)...
Mercury (Hg) is highly toxic in its methylated form (MeHg), and global change likely to modify bioavailability the environment. However, it unclear how top predators will be impacted. We studied blood Hg concentrations of chick-rearing black-legged kittiwakes Rissa tridactyla (2000–2019) Svalbard (Norway). From 2000 2019, followed a U-shaped trend. The trophic level, inferred from nitrogen stable isotopes, chlorophyll (Chl a) better predicted concentrations, with positive associations,...
Understanding variation in animal distributions is a central and challenging question ecology that has become particularly critical the context of global environmental changes. While are often studied for resident or breeding species, species range limits equally important migratory winter when population regulation may occur due to limited resources non‐breeding season. A hypothesis several theories density, fitness performance individuals decrease towards edge as organisms maladapted...
Seabirds, as long-lived top predators, accumulate contaminants such mercury (Hg), an established endocrine disruptor. In long lived species hormonal secretion varies with age; therefore, Hg-induced disruption may be exacerbated in some age classes. Here we investigated relationships between blood total Hg and luteinizing hormone (LH, a key pituitary for the onset of breeding), pre-laying known-age (11–45 years old) snow petrels (Pagodroma nivea) from Adélie Land, Antarctica. We predicted...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 496:125-133 (2014) - DOI: https://doi.org/10.3354/meps10603 Theme Section: Tracking fitness in marine vertebrates Corticosterone mediates carry-over effects between breeding and migration kittiwake Rissa tridactyla Jannik Schultner1,4,*, Børge Moe2, Olivier Chastel3, Sabrina Tartu3, Claus Bech1, Alexander S....
Per- and polyfluoroalkyl substances (PFAS) are associated with several disrupted physiological endocrine parameters. Regarding mechanisms, laboratory studies suggest that PFAS could disrupt the thyroid hormone system alter circulating concentrations. Thyroid hormones play a ubiquitous role-controlling thermoregulation, metabolism, reproduction. However, evidence for disruption of by remains scarce in wildlife. The present study investigated associations between concentrations PFAS, hormones,...