A5051719946- Mercury impact and mitigation studies
- Heavy Metal Exposure and Toxicity
- Environmental Toxicology and Ecotoxicology
- Heavy metals in environment
- Isotope Analysis in Ecology
- Toxic Organic Pollutants Impact
- Diatoms and Algae Research
- French Urban and Social Studies
- Fish biology, ecology, and behavior
- Marine and fisheries research
- Mining and Resource Management
- Fish Ecology and Management Studies
- Water Treatment and Disinfection
- Aquatic Ecosystems and Phytoplankton Dynamics
- Fish Biology and Ecology Studies
- Trace Elements in Health
- Agriculture and Rural Development Research
- Advanced Nanomaterials in Catalysis
- Marine and environmental studies
- Wildlife Conservation and Criminology Analyses
- Water Quality and Pollution Assessment
- Geochemistry and Elemental Analysis
- Marine animal studies overview
- Indigenous Health and Education
- Marine Biology and Environmental Chemistry
Environnements et Paléoenvironnements Océaniques et Continentaux
2013-2023
Université de Bordeaux
2012-2023
Centre National de la Recherche Scientifique
2009-2023
Géosciences Environnement Toulouse
2023
Institut de Recherche pour le Développement
2023
École Pratique des Hautes Études
2020-2021
Université de Pau et des Pays de l'Adour
2011
Ifremer
2005
Écologie Fonctionnelle et Écotoxicologie des Agroécosystèmes
2004
Institut de Veille Sanitaire
2001
In 1994, the French National Public Health Network reported significant mercury exposure of native Amerindians in Guiana. 1997, a study was conducted Wayana community to quantify dietary intake and identify fish species contributing most contamination. The completed by an impregnation analysis based on Hg determination hair samples. methodology used detailed familial associated with measurements some game. over 7 days two different seasons four populated villages upper part Maroni River (521...
An original approach is proposed to investigate inorganic (iHg) and methylmercury (MeHg) trophic transfer fate in a model fish, Danio rerio, by combining natural isotopic fractionation speciation. Animals were exposed three different dietary conditions: (1) 50 ng Hg g–1, 80% as MeHg; (2) diet enriched MeHg 10 000 95% MeHg, (3) iHg 99% iHg. Harvesting was carried out after 0, 7, 25, 62 days. Time-dependent species distribution fish organs (muscle, brain, liver) feces, exhibited patterns,...
Abstract The involvement of metallothioneins (MTs) in cadmium (Cd) and inorganic mercury (Hg[II])bioaccumulation by the freshwater bivalve Corbicula fluminea was experimentally investigated after 0, 15, 30, 45 d exposure from water column source. Three levels contamination were studied for each metal: 5, 35 μg Cd/L 1.45, 5 Hg/L, with two replicates per condition. Forty eight experimental units (EUs) conducted simultaneously. mollusks fed twice a week additions phytoplanktonic algae....
A multidisciplinary approach is proposed here to compare toxicity mechanisms of methylmercury (MeHg) and inorganic mercury (iHg) in muscle, liver, brain from zebrafish (Danio rerio). Animals were dietary exposed (1) 50 ng Hg g(-1), 80% as MeHg; (2) diet enriched MeHg 10000 95% (3) iHg 99% iHg, for two months. species specific bioaccumulation pathways highlighted, with a preferential liver. In the same way, differences genetic pattern observed both species, (an early response (7 days) three...
Since the late 1980s, several studies have shown that human populations in Amazon basin are exposed to high mercury levels their fish diet. Gold mining, which releases metal during amalgamation process and erodes soils naturally rich mercury, is regarded as main contamination source. Here, we present results of a comparative study distribution water two adjacent rivers French Guiana, with without gold mining activities. As consequence marked difference suspended particulate matter between...
Mercury (Hg) is a widespread environmental contaminant and its organic form, methylmercury (MeHg), has been known as potent neurotoxic since the Minamata tragedy. In Amazonian basin, gold mining leads to MeHg biomagnification all along food web, culminating in piscivorous fish, ultimately responsible for contamination of human beings through fish consumption. order assess biological impact dietary on at genome scale, we contaminated zebrafish with MeHg-contaminated 25 days (13.5 μg Hg/g...
Industrial pollution due to heavy metals such as mercury is a major concern for the environment and public health. Mercury, in particular methylmercury (MeHg), primarily affects brain development neuronal activity, resulting neurotoxic effects. Because chemokines can modulate functions are involved neuroinflammatory neurodegenerative diseases, we tested possibility that effect of MeHg may interfere with chemokine CCL2. We have used an original protocol young mice using MeHg-contaminated...
UPPER MARONI (Wayana villages)Figure 1.Location of the four Wayana villages-Cayode, Twenke
The Petit-Saut hydroelectric reservoir was filled in 1994 on the Sinnamary River French Guiana (Amazonian basin). Flooding of equatorial rain forest led to anoxia most water column and enhanced mercury methylation hypolimnion. We selected benthivorous/omnivorous fish species Curimata cyprinoides investigate total methylmercury (MeHg) bioavailability bioaccumulation capacities downstream River. Mercury concentrations dorsal skeletal muscle were 10-fold higher from zone. Stomach contents...
In 1994, the French National Public Health Network reported significant mercury exposure of native Amerindians in Guiana. 1997, a study was conducted Wayana community to quantify dietary intake and identify fish species contributing most contamination. The completed by an impregnation analysis based on Hg determination hair samples. methodology used detailed familial associated with measurements some game. over 7 days two different seasons four populated villages upper part Maroni River (521...