References of "Thomé, Jean-Pierre"
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See detailDistribution of inorganic and organic contaminants in the intertidal surface sediments along the Hugli River Estuary, eastern part of India
Das, Krishna ULg; Sarkar, Santosh; Thomé, Jean-Pierre ULg et al

Conference (2016, February 17)

Hooghly estuary and coastal environment in north east coast of India has been strongly affected by the rapid human settlements, intensive boating and tourist activities, deforestation and ongoing ... [more ▼]

Hooghly estuary and coastal environment in north east coast of India has been strongly affected by the rapid human settlements, intensive boating and tourist activities, deforestation and ongoing agricultural and aquacultural practices. The present work investigated trace elements (TEs, T-Hg, Al, V, Cr, Fe, Mn, Cu, Zn, Co, Ni, Ca, Sr, Li, Be, P, Mo, Ag, Cd, Sn, Sb, Ba, Pb, Bi, U, As, Se) and organohalogen compounds in surface sediment (top 0-10cm) considering 8 sampling sites along the Hugli River Estuary (HRE), India. The studied organic compounds include polychlorobiphenyls (PCBs), hexachlorocyclohexane isomers (HCHs), dichlorodiphenyltrichloroethane and metabolites (DDTs) and polybromodiphenyl ethers (PBDEs). Textural analyses of the sediment reveal an overall dominance of mud. All trace elements could be detected at variable concentrations in the following descending order: Al>Fe>Ca> P>Mn> Cu> Zn> Ba >V >Cr>Sr>Ni> Li >Co >Pb>As >Se >U >Be >Sn>Bi >Ag >Mo >Cd >Sb. A synchronous enrichment of majority of the elements were observed at the site Gangasagar (~100 km south megacity Calcutta), situated at the confluence of Hugli River and Bay of Bengal, which might be attributed to cumulative impact of the physicochemical processes and multiple anthropogenic sources. It is revealed that PCBs and DDTs were the dominant compounds among the organic pollutants accounting concentrations up to 23.5 ng.g-1 and 4.4 ng.g-1 respectively at the site Babughat, adjacent to the megacity Calcutta. The results have implications for pollution in complex estuarine environment in a meso-macrotidal setup where there is significant influx of sediments carrying huge load of inorganic and organic pollutants mainly due to rapid urbanization and industrialization. [less ▲]

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See detailSpatial variations in the concentrations of mercury and persistent organic pollutants in free-ranging bottlenose dolphins from South Florida
Das, Krishna ULg; Damseaux, France ULg; Heithaus, M.R. et al

Poster (2015, December)

The bottlenose dolphin (Tursiops truncatus) is an abundant top predator found in nearshore waters of South Florida including heavily developed and remote coastal waters. The objective of this study was to ... [more ▼]

The bottlenose dolphin (Tursiops truncatus) is an abundant top predator found in nearshore waters of South Florida including heavily developed and remote coastal waters. The objective of this study was to quantify total mercury (T-Hg) and persistent organic pollutant (POPs: NDL-PCBs, PBDEs, DDT, HCH, HCB, PCDD/Fs and DL-PCBs) levels in bottlenose dolphins found off the highly populated island of Key West (n = 27) and from the undeveloped Florida Coastal Everglades (FCE; n = 20). T-Hg and POPs were analyzed in skin and blubber tissues, respectively, using a Direct Mercury analyzer (for T-Hg), GC-ECD (POPs) and GC-HRMS (DLCs). The 7 ICES PCBs were the main compounds found in bottlenose dolphins from Key West (8229 ng.g-1 lipids) and the FCE (2289 ng.g-1 lipids), while the concentrations of PCDD/Fs remained low (Key West: 104 pg.g-1 lipids, FCE: 102 pg.g-1 lipids). POP concentrations were higher in individuals from Key West compared to those from the FCE. However, POP concentrations in Key West dolphins were lower than those from other locations in Florida and around the world. Unlike organic pollutants, T-Hg concentrations were significantly higher in FCE dolphins (Key West: 2941 ng.g-1 dw versus, FCE: 9314 ng.g-1 dw), with the highest concentrations reported from the southeastern US. PCB concentrations remained under previously suggested threshold for adverse health effects (including immunosuppression) in marine mammals of 17 000 ng/kg lipid. To conclude, sources of T-Hg and POPs differed between Key West and the FCE as reflected by their concentrations in skin and blubber of free-ranging bottlenose dolphins highlighting their role as sentinels of their environment. [less ▲]

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See detailGender differences in responses in Gammarus pulex exposed to BDE-47: a gel-free proteomic approach
Gismondi, Eric ULg; Mazzucchelli, Gabriel ULg; De Pauw, Edwin ULg et al

in Ecotoxicology & Environmental Safety (2015), 122

Very few ecotoxicological studies have considered differences in toxic effects on male and female organisms. Here, we investigated protein expression differences in caeca of Gammarus pulex males and ... [more ▼]

Very few ecotoxicological studies have considered differences in toxic effects on male and female organisms. Here, we investigated protein expression differences in caeca of Gammarus pulex males and females under control conditions (unexposed) and after 96 h exposure to BDE-47. Using gel-free proteomic analysis, we have identified 45 proteins, of which 25 were significantly differently expressed according to sex and/or BDE-47 exposure. These proteins were involved in several biological processes such as energy metabolism, chaperone proteins, or transcription/translation. In unexposed amphipods, 11 proteins were significantly over-expressed in females, and 6 proteins were over-expressed in males. Under BDE-47 stress, 7 proteins were differently impacted according to sex. For example, catalase was over-expressed in exposed females and under-expressed in exposed males, as compared to respective controls. Conversely, proteins involved in energy metabolism were up-regulated in males and down-regulated in females. Our proteomic study showed differences in responses of males and females to BDE-47 exposure, emphasizing that sex is a confounding factor in ecotoxicological assessment. However, due to the limited information existing in databases on Gammarids, it was difficult to define a BDE-47 mechanism of action. The gel-free proteomic seems to be a promising method to develop in future ecotoxicological studies and thus, to improve our understanding of the mechanism of action of xenobiotics. [less ▲]

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See detailSTAtion of Reference and rEsearch on Change of local and global Anthropogenic Pressures on Mediterranean Ecosystems Drifts: The STARECAPMED project
Richir, Jonathan ULg; Abadie, Arnaud ULg; Binard, Marc ULg et al

Conference (2015, November 08)

The Marine and Oceanographic Research Station STARESO in the Calvi Bay, Corsica (France), is a unique tool in a preserved natural site that includes all the characteristic ecosystems of the Mediterranean ... [more ▼]

The Marine and Oceanographic Research Station STARESO in the Calvi Bay, Corsica (France), is a unique tool in a preserved natural site that includes all the characteristic ecosystems of the Mediterranean littoral. The station, established in 1970, has archived environmental data for decades. The STARECAPMED project, multidisciplinary, articulates itself around these two main features. Its objective is to understand how human activities can interact with the fundamental processes that govern the functioning of the different coastal ecosystems of a Mediterranean bay. The understanding of these interactions involves: (i) the identification of the anthropogenic pressures; (ii) the quantification of their impacts on the ecosystems; (iii) the prioritization of these impacts. STARECAPMED also aims to confirm the relevance of the use of the Calvi Bay as a reference in the study of local and global pressures and the changes they may cause on the structure and the functioning of Mediterranean coastal ecosytems. [less ▲]

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See detailSpatial variations in concentrations of mercury and persistent organic pollutants in coastal bottlenose dolphins, Tursiops truncatus, from the Lower Florida Keys and the coastal Everglades (South Florida)
Damseaux, France ULg; Kiszka, Jeremy; Heithaus, Michael et al

Conference (2015, October 09)

The bottlenose dolphin (Tursiops truncatus) is a major apex predator and the most common cetacean species found in nearshore waters of South Florida, including the Lower Florida Keys (LFK) and the ... [more ▼]

The bottlenose dolphin (Tursiops truncatus) is a major apex predator and the most common cetacean species found in nearshore waters of South Florida, including the Lower Florida Keys (LFK) and the Everglades National Park (ENP). The objective of this study was 1) to assess contamination levels of total mercury (T-Hg) in skin and persistent organic pollutants (PCBs, PBDEs, DDT, HCH, HCB, DLCs and PCDD/Fs) in blubber samples of bottlenose dolphins from the LFK (T-Hg : nmales = 10; POPs : nmales = 16, nfemales = 8) and the ENP (T-Hg : nmales = 13, nfemales = 9; POPs : nmales = 11, nfemales = 8). T-Hg and POPs were analysed by the mean of Direct Mercury analyser (for T-Hg), GC-ECD (POPs) and GC-MS (DLCs and PCDD/Fs). The PCBs were the main compounds found in bottlenose dolphins from the LFK and ENP. The most present congeners where the CB no. 28, 52, 101, 138, 153 and 180 (Σ 6 PCBs LFK males: 13420.5 ng.g-1 lipids, Σ 6 PCBs LFK females: 9683.4 ng.g-1 lipids, Σ 6 PCBs ENP males: 5637.9 ng.g-1 lipids, Σ 6 PCBs ENP females: 1426.9 ng.g-1 lipids), while the concentrations of DL PCBs remained low for both locations (LFK: 739 ng.g-1 lipids, ENP: 183 ng.g-1 lipids). PCBs concentrations were significantly higher in individuals from the LFK than those from the ENP. PCBs concentrations in LFK and ENP dolphins were significantly lower than those from other locations in the south-eastern US. Unlike organic pollutants, T-Hg concentrations were significantly higher in ENP male dolphins (LFK: 2936.0 ng.g-1 dw, ENP: 10048.3 ng.g-1 dw). These high concentrations were the highest recorded in the south-eastern US and are most likely due to the presence of mangrove ecosystems. This study highlights the complexity of contaminant dynamics (inorganic vs. organic), even at small spatial scales. [less ▲]

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See detailSTARECAPMED (STAtion of Reference and rEsearch on Change of local and global Anthropogenic Pressures on Mediterranean Ecosystems Drifts) - Année 2014. Rapport de recherches.
Richir, Jonathan ULg; Abadie, Arnaud ULg; Binard, Marc ULg et al

Report (2015)

La prise de conscience, par le grand public, de l'impact grandissant de l'homme sur l'océan est récente. Elle se traduit par une volonté politique sincère de correction par des mesures de protection, de ... [more ▼]

La prise de conscience, par le grand public, de l'impact grandissant de l'homme sur l'océan est récente. Elle se traduit par une volonté politique sincère de correction par des mesures de protection, de gestion et de développement durable. Ces politiques, et leurs conséquences économiques et sociétales lourdes, ne peuvent être acceptées que si les décisions se fondent sur des connaissances scientifiques incontestables et montrent des résultats scientifiquement prouvés. Par ailleurs, ces décisions doivent prendre en compte des impacts qui s'opèrent à des échelles de temps et d’espace très variables, de quelques heures à plusieurs dizaines d’années et de quelques mètres à plusieurs milliers de km. En termes politiques, l'information scientifique nécessaire à la prise de décision doit pouvoir couvrir les différentes échelles depuis le niveau local et régional, jusqu'à l'échelle nationale, européenne voire globale, et cela sur le plus long terme possible. Enfin, pour être complète, l'information scientifique sur les écosystèmes marins doit pouvoir répondre à trois questions objectives : (i) quel est l'état? (ii) quelle est l'évolution? (iii) quels sont les mécanismes et processus mis en jeux? et à une question plus prospective : (vi) que peux-t-on prévoir et comment agir? Le présent rapport ne peut pas, à lui seul, refléter toute la richesse du programme STARECAPMED. En 3 ans, STARECAPMED a généré plusieurs centaines de milliers de données nouvelles, ré-exploité plusieurs centaines de publications, rapports et autres enregistrements passés et présents. Le programme a aussi généré de nombreux documents, rapports et mémoires. Enfin, des publications internationales et des thèses de doctorat sont en cours de réalisation ou abouties. Afin de rester lisible, nous avons donc choisi de présenter ce rapport 2014 sous la forme de 12 exemples parmi les travaux en cours. Ces exemples sont traités selon un schéma identique en 4 points simples : (i) La présentation du cas d’étude dans le projet global ; (ii),Les approches innovatrices développées ; (iii),La présentation de résultats marquants ; (iv),Les délivrables de STARECAPMED pour les politiques publiques. [less ▲]

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See detailProteome variations in Macrobrachium rosenbergii exposed to chlordecone: a gel-free proteomic approach
Lafontaine, Anne ULg; De Pauw, Edwin ULg; Forget-Leray, Joelle et al

Poster (2015, May 06)

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See detailThe effects of perinatal exposure to polychlorinated biphenyls on hippocampal neurogenesis
Pinson, Anneline ULg; Parent, Anne-Simone ULg; chatzi, christina et al

Poster (2015, May)

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See detailAssociations of Plasma Concentrations of Dichlorodiphenyldichloroethylene and Polychlorinated Biphenyls with Prostate Cancer: A Case–Control Study in Guadeloupe (French West Indies)
Emeville, Elise; Giusti, Arnaud ULg; Coumoul, Xavier et al

in Environmental Health Perspectives (2015), 123(4), 317-323

Background: Long-term exposure to persistent pollutants with hormonal properties (endocrine-disrupting chemicals, EDCs) may contribute to the risk of prostate cancer (PCa). However, epidemiological ... [more ▼]

Background: Long-term exposure to persistent pollutants with hormonal properties (endocrine-disrupting chemicals, EDCs) may contribute to the risk of prostate cancer (PCa). However, epidemiological evidence remains limited. Objectives: We investigated the relationship between PCa and plasma concentrations of universally widespread pollutants, in particular p,p’- dichlorodiphenyl dichloroethene (DDE) and the non-dioxin like polychlorinated biphenyl congener 153 (PCB153). Methods and Findings: We evaluated before treatment 576 men with newly diagnosed PCa and 655 controls in Guadeloupe (French West Indies). Exposure was analyzed according to case-control status. Associations were assessed by unconditional logistic regression analysis, controlling for confounding factors. Missing data were handled by multiple imputation. We estimated a significant positive association between DDE and PCa (adjusted odds ratio [OR] 1.53; 95% CI 1.02, 2.30 for the highest versus lowest quintile of exposure; PTrend= 0.01). PCB153 was inversely associated with PCa (OR 0.30; 95% CI 0.19, 0.47 for the highest versus lowest quintile of exposure values; PTrend<0.001). Also, PCB153 was more strongly associated to low-grade than high grade PCa. Conclusions: Associations of PCa with DDE and PCB153 were in opposite directions. This may reflect differences in the mechanisms of action of these EDCs, and although our findings need to be replicated in other populations, they are consistent with complex effects of EDCs on human health. [less ▲]

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See detailEco-toxicological analysis of free-ranging cetaceans from the North-western Mediterranean Sea
Pinzone, Marianna ULg; Ody, Denis; Lepoint, Gilles ULg et al

Conference (2015, March 25)

The numerous anthropogenic activities occurring nowadays in the North-western Mediterranean Sea strongly affect top predators such as marine mammals, especially through the bioaccumulation of lipophilic ... [more ▼]

The numerous anthropogenic activities occurring nowadays in the North-western Mediterranean Sea strongly affect top predators such as marine mammals, especially through the bioaccumulation of lipophilic contaminants. In order to assess the eco-toxicological status of local living cetaceans blubber biopsies were collected between 2006 and 2013. Selected persistent organic pollutants POPs (31PCBs, 15 organochlorine compounds, 9 PBDEs and 17 PCDD/Fs) were analyzed in 49 long-finned pilot whales Globicephala melas, 61 sperm whales Physeter macrocephalus and 70 fin whales Balaenoptera physalus. δ13C, δ15N values and POPs levels were assessed through IR-MS and GC-MS respectively. To assess the toxic potency of the dioxin-like compounds, the TEQ approach was applied. δ15N values were 12.2±1.3‰ for sperm whales, 10.5±0.7‰ for pilot whales and 7.7±0.8‰ in fin whales, positioning sperm whales at higher trophic levels. δ13C instead was similar and amounted to −17.3±0.4‰, −17.8±0.3‰ and −18.7±0.4‰ respectively. Pilot whales presented higher concentrations than sperm whales for ΣPCBs (38666±25731ng.g-1 lw and 22849±15566ng.g-1 lw respectively), ΣPBDEs (712±412ng.g-1 lw and 347±173ng.g-1 lw respectively) and ΣDDTs (46081±37506ng.g-1 lw and 37647±38518ng.g-1 lw respectively). Fin whales presented the lowest values, in accordance with its trophic position (ΣPCBs: 5721±5180ng.g-1 lw, ΣPBDEs: 177±208ng.g-1 lw and ΣDDTs: 6643±5549ng.g-1 lw). The PCA analysis confirmed how p,p’DDT and p,p’DDE were influential in differentiating the species, as a consequence of their migratory behavior and distribution. Pollutant concentrations were significantly higher than both their Southern Hemisphere and North Atlantic counterparts, possibly due to the particular Mediterranean geomorphology, which influences pollutants distribution and recycle. Dioxin-like  PCBs accounted for over 80% of the total TEQ. This study demonstrated (1) an important exposure to pollutants of Mediterranean toothed-whales, often surpassing the estimated threshold toxicity value of 17000ng.g−1 lw for blubber in marine mammals; and (2) how their geographical distribution can influence the pollutants profile and concentrations. [less ▲]

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See detailInfluences of blubber composition and profile in the assessment of POPs levels in free-ranging cetaceans
Pinzone, Marianna ULg; Budzinski, Hélène; Tasciotti, Aurelie et al

Poster (2015, February 28)

Investigating the food and feeding ecology of free-ranging cetaceans has always been very challenging. Still now, mass stranding events represent almost the only opportunity to collect valid information ... [more ▼]

Investigating the food and feeding ecology of free-ranging cetaceans has always been very challenging. Still now, mass stranding events represent almost the only opportunity to collect valid information on these large and elusive animals. Biopsy darting is a non-lethal tissue sampling technique which permits the collection of tissues from living and healthy individuals. However, important discussions exist about how efficient this method is in chemical analyses where the percentage lipid content of the tissue is of great importance. Biopsies of skin and blubber were conducted on 49 long-finned pilot whales (Globicephala melas), 61 sperm whales (Physeter macrocephalus) and 70 fin whales (Balaenoptera physalus) in the North Western Mediterranean Sea (NWMS) from 2006 to 2013. Lipid content, δ13C, δ15N values and ΣPCBs were analysed and compared with previous studies conducted on stranded and biopsied individuals. Lipids extraction was operated via ASE; δ13C, δ15N values and POPs levels were assessed through IR-MS and GC-MS respectively. δ15N values were 12.2±1.3‰ for sperm whales, 10.5±0.7‰ for pilot whales and 7.7±0.8‰ in fin whales, positioning sperm whales at higher trophic levels. δ13C instead was similar and amounted to −17.3±0.4‰, −17.8±0.3‰ and −18.7±0.4‰ respectively. Pilot whales presented the highest concentrations of ΣPCBs (38666 ± 25731ng.g-1 lw) followed by sperm whales (22849 ± 15566ng.g-1 lw) and fin whales (5721±5180ng.g-1 lw). Lipids percentage differed significantly between species. Sperm whales showed the lowest lipid content with an average of 12±9%, whereas for long-finned pilot whales it was 22±21% and for fin whales 31±14%. Lipid content of the two odontocetes varied between years of sampling, whilst for fin whales remained similar. The PCBs concentrations, especially in sperm whales, were in discordance with previous studies conducted in the same area and our δ13C, δ15N values. We hypothesized that (1) the extreme low lipid content found in the blubber, (2) the extraction procedure and (3) the biopsies technique, could explain such different pattern. Several papers demonstrated how POPs concentrations in cetaceans blubber are strongly influenced by its thickness, stratification and lipid profile. Therefore, the particular characteristics of blubber composition of deep—diving income breeders such as sperm whales, may not allow an efficient representation of POPs concentrations through the use of biopsies. [less ▲]

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See detailPOPs in free-ranging pilot whales, sperm whales and fin whales from the Mediterranean Sea: Influence of biological and ecological factors
Pinzone, Marianna ULg; Budzinski, Hélène; Tasciotti, Aurélie et al

in Environmental Research (2015), 142

The pilot whale Globicephala melas, the sperm whale Physeter macrocephalus and the fin whale Balaenoptera physalus are large cetaceans permanently inhabiting the Mediterranean Sea. These species are ... [more ▼]

The pilot whale Globicephala melas, the sperm whale Physeter macrocephalus and the fin whale Balaenoptera physalus are large cetaceans permanently inhabiting the Mediterranean Sea. These species are subjected to numerous anthropogenic threats, such as exposure to high levels of contaminants. Therefore, selected persistent organic pollutants, POPs (29 PCBs, 15 organochlorine compounds, nine PBDEs and 17 PCDD/Fs), were analysed in the blubber biopsies of 49 long-finned pilot whales, 61 sperm whales and 70 fin whales collected in the north-western Mediterranean Sea (NWMS) from 2006 to 2013. The contamination profile and species feeding ecology were combined through the use of stable isotopes. δ13C, δ15N values and POPs levels were assessed through IR-MS and GC-MS, respectively. To assess the toxic potency of the dioxin-like compounds, the TEQ approach was applied. δ15N values were 12.2 ± 1.3‰ for sperm whales, 10.5 ± 0.7‰ for pilot whales and 7.7±0.8‰ in fin whales, which positions sperm whales at higher trophic levels. δ13C of the two odontocetes were similar and amounted to −17.3±0.4‰ for sperm whales and −17.8±0.3‰ for pilot whales, whereas the result for fin whales reflected more depleted (−18.7±0.4‰). This outcome indicates a partial overlap in the feeding habits of toothed whales and confirms the differences in feeding behaviour of the mysticete. Pilot whales had higher concentrations than sperm whales for ΣPCBs (38666 ± 25731 ng.g-1 lw and 22849 ± 15566 ng.g-1 lw, respectively), ΣPBDEs (712±412 ng.g-1 lw and 347±173 ng.g-1 lw, respectively) and ΣDDTs (46081±37506 ng.g-1 lw and 37647±38518 ng.g-1 lw, respectively). Fin whales had the lowest values, which reflected its trophic position (ΣPCBs: 5721±5180 ng.g-1 lw, ΣPBDEs: 177±208 ng.g-1 lw and ΣDDTs: 6643±5549 ng.g-1 lw). Each species was characterized by large inter-individual variations that are more related to sex than trophic level. Males presented a higher contaminant burden than females. The discriminant analysis (DA) confirmed how DDTs and highly chlorinated PCBs could differentiate the three species. The pollutant concentrations of our species were significantly higher than both their southern hemisphere and North Atlantic counterparts. This result is possibly due to Mediterranean geomorphology, which influences the distribution and recycling of pollutants. Dioxin-like PCBs accounted for over 80% of the total TEQ. This study demonstrated (1) the pollutants of Mediterranean cetaceans often surpassed the estimated threshold toxicity value of 17000 ng.g−1 lw for blubber in marine mammals and (2) how the final pollutant burden in these animals is strongly influenced not only by trophic position but also by numerous other factors, including sex, age, body size and geographical distribution. [less ▲]

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See detailPollutant Exposure in Green and Hawksbill Marine Turtles from the Caribbean Region
Dyc, Christelle; Covaci, Adrian; Debier, Cathy et al

in Regional Studies in Marine Science (2015), 2(1), 158-170

Despite their common occurrence in Guadeloupe, little is known about levels and effects of pollutants in free-ranging green (Chelonia mydas) and hawksbill (Eretmochelys imbricata) turtles. The aims of ... [more ▼]

Despite their common occurrence in Guadeloupe, little is known about levels and effects of pollutants in free-ranging green (Chelonia mydas) and hawksbill (Eretmochelys imbricata) turtles. The aims of this study were 1) to evaluate levels of persistent organic pollutants and trace elements in Guadeloupian marine turtles, 2) to assess the risk for turtle embryo facing chemical exposure. Eggs and dermis were collected from 11 green and 4 hawksbill turtles and analysed for inorganic and organic pollutants. Chemical risks were evaluated for turtle embryos through a screening risk assessment (SRA). ΣPCBs and chlordecone were the main contaminant groups in green and hawksbill turtles. Contaminant levels were lower in the Guadeloupean populations than in the other ones. p,p'-DDE, selenium, mercury and cadmium could affected the marine turtle embryos. This study is the first to provide levels of pollutants in marine turtles from Guadeloupe. [less ▲]

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