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5 results on '"Nicolas Pédron"'

1. New set of candidate gene SNPs and microsatellites to disentangle selective and neutral processes shaping population responses of European flounder (Platichthys flesus) to anthropogenic stress and contrasted environments

Author

Grégory Charrier, Romain Morvezen, Jean Laroche, Alan Le Moan, Bruno Guinand, Nicolas Pédron, José-Luis Zambonino-Infante, Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010), Institut de Recherche pour le Développement (IRD)-Institut Universitaire Européen de la Mer (IUEM), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), and ANR-10-LABX-0019/10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010)

Subjects
0106 biological sciences, Candidate gene, Range (biology), Platichthys flesus, Population, BHMT, SNP, Flounder, Single-nucleotide polymorphism, 01 natural sciences, 03 medical and health sciences, L-PGDS, Genetics, AMPD, EUROPEAN FLOUNDER, education, Ecology, Evolution, Behavior and Systematics, 030304 developmental biology, European flounder, P53, 0303 health sciences, education.field_of_study, biology, GAPDH, Ecology, ACL, 010604 marine biology & hydrobiology, Multiplexes, biology.organism_classification, Platichthys, Microsatellite, [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Abstract

International audience; Six candidate gene SNP assays and 12 new microsatellites were developed in the European flounder (Platichthys flesus), in order to provide new tools to (1) further investigate signatures of selection suspected on candidate genes, and (2) better depict the neutral evolutionary background shaping the differentiation of populations. All markers were successfully tested in two populations from contrasted estuaries, and should be helpful to better understand the possible adaptive responses of flounder populations to anthropogenic pressures (e.g. global warming, eutrophication, pollutions), over the whole distribution range of the species.

Published
2015
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2. Proteomic responses of European flounder to temperature and hypoxia as interacting stressors: Differential sensitivities of populations

Author

Grégory Charrier, Nicolas Pédron, Sébastien Artigaud, Vianney Pichereau, Jean Laroche, Nicolas Le Bayon, José-Luis Zambonino Infante, Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), ANR-10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010), Institut Universitaire Européen de la Mer (IUEM), and Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO)

Subjects
0106 biological sciences, 0301 basic medicine, Proteomics, Environmental Engineering, Bioenergetics, Proteome, Climate Change, Population, Context (language use), Flounder, Biology, 01 natural sciences, 03 medical and health sciences, Stress, Physiological, Environmental Chemistry, Animals, EUROPEAN FLOUNDER, education, Hypoxia, Multiple stressors, Waste Management and Disposal, Local adaptation, Abiotic component, education.field_of_study, Portugal, Ecology, Fish populations, 010604 marine biology & hydrobiology, ACL, Temperature, 15. Life on land, biology.organism_classification, Pollution, 030104 developmental biology, 13. Climate action, Temperature rising, Ectotherm, France, [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Abstract

International audience; In the context of global change, ectotherms are increasingly impacted by abiotic perturbations. Along the distribution area of a species, the populations at low latitudes are particularly exposed to temperature increase and hypoxic events. In this study, we have compared the proteomic responses in the liver of European flounder populations, by using 2-D electrophoresis. One southern peripheral population from Portugal vs two northern core populations from France, were reared in a common garden experiment. Most of the proteomic differences were observed between the two experimental conditions, a cold vs a warm and hypoxic conditions. Consistent differentiations between populations were observed in accumulation of proteins involved in the bioenergetics- and methionine-metabolisms, fatty acids transport, and amino-acid catabolism. The specific regulation of crucial enzymes like ATP-synthase and G6PDH, in the liver of the southern population, could be related to a possible local adaptation. This southern peripheral population is spatially distant from northern core populations and has experienced dissimilar ecological conditions; thus it may contain genotypes that confer resilience to climate changes.

Published
2017
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3. Contrasting patterns of energy metabolism in northern vs southern peripheral European flounder populations exposed to temperature rising and hypoxia

Author

Fabienne Le Grand, Nicolas Le Bayon, Vanessa F. Fonseca, Rita P. Vasconcelos, Jessy Le Du, Nicolas Pédron, José-Luis Zambonino-Infante, Grégory Charrier, Jean Laroche, Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Marine and Environmental Sciences Centre [Portugal] (MARE), Instituto Universitário de Ciências Psicológicas, Sociais e da Vida (ISPA), ANR-10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010), Repositório da Universidade de Lisboa, Institut Universitaire Européen de la Mer (IUEM), and Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO)

Subjects
0106 biological sciences, Bioenergetics, Anabolism, Flounder, Oceanography, 01 natural sciences, chemistry.chemical_compound, Global change, education.field_of_study, adaptive divergence, Ecology, Temperature, Hypoxia (environmental), General Medicine, Pollution, chemical stress, intraspecific variation, climate-change, Interacting stressors, France, Estuaries, Environmental Monitoring, juvenile turbot, Population, Platichthys flesus, Aquatic Science, Biology, 010603 evolutionary biology, Animal science, Stress, Physiological, Lactate dehydrogenase, Animals, Seawater, 14. Life underwater, EUROPEAN FLOUNDER, education, global change, Local adaptation, Thermal tolerance, Portugal, yellow perch, 010604 marine biology & hydrobiology, ACL, Aquatic animal, biology.organism_classification, gene-expression, platichthys-flesus l, chemistry, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Energy Metabolism
Abstract

WOS:000407981500023; A two months common garden experiment was carried out to explore the potential differences of energy metabolism in northern core (France, 50 degrees N and 47 degrees N)vs southern peripheral (Portugal, 41 degrees N) populations of European flounder Platichthys flesus, submitted to cold condition (CC: water temperature = 10 degrees C) and to warm and hypoxic condition (WHC: water temperature = 22 degrees C, and moderate hypoxia with O-2 saturation = 40% during the last 6 days). Convergent growth rates (in length) were observed in the different populations and conditions, when the southern peripheral population of Portugal did not grow under cold conditions. A general reduction in liver lipid storage was observed in all populations subjected to WHC when compared to CC, whereas muscle lipid storage was unaffected. The thermal and hypoxia treatment induced changes in muscle phospholipids (PL) ratios: phosphatidylserine/PL, phosphatidylinositol/PL, between northern and southern populations. Fish from northern estuaries displayed marked anaerobiosis in WHC (increased liver LDH activity) vs marked aerobiosis under CC (higher muscle CS and CCO activities). Contrariwise, fish from the southern estuary displayed equilibrium between anaerobiosis and aerobiosis activities in WHC. Flounders from the southern population exhibited generally lower G6PDH activity (proxy for anabolism and for defense against oxidative damage), tissue-specific anaerobiosis response (muscle LDH activity) and lower CS and CCO muscle activities (aerobiosis markers) when compared to northern populations. Globally, these inter-population differences in bioenergetics suggest that southern peripheral vs northern core populations have developed differential capacity to cope with interacting stressors and that much of this variation is more likely due to local adaptation.

Published
2017
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4. Bioenergetic transcriptomic responses of European flounder (Platichthys flesus) populations in contrasted environments: impacts of pollution and global warming

Author

Véronique Loizeau, Michael Theron, Jean Laroche, Elodie Borcier, Aline Amérand, Nicolas Pédron, Grégory Charrier, Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Optimisation des régulations physiologiques (ORPHY (EA 4324)), Université de Brest (UBO)-Centre Hospitalier Régional Universitaire de Brest (CHRU Brest)-Institut Brestois Santé Agro Matière (IBSAM), Université de Brest (UBO)-Université de Brest (UBO), Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), and ANR-08-VULN-0004,EVOLFISH,Effects of global warming and contamination on the evolutionnary response of two coastal fishes(2008)

Subjects
Pollution, European flounder, Platichthys flesus, pollution, global warming, Bioenergetics, media_common.quotation_subject, 0211 other engineering and technologies, RM1-950, 02 engineering and technology, 010501 environmental sciences, Toxicology, 01 natural sciences, RA1190-1270, 14. Life underwater, EUROPEAN FLOUNDER, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, media_common, Pharmacology, 021110 strategic, defence & security studies, biology, ACL, Global warming, biology.organism_classification, Platichthys, Fishery, 13. Climate action, Toxicology. Poisons, Therapeutics. Pharmacology, [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Abstract

Estuaries are among the most anthro- pogenically degraded habitats on Earth. These shallow waters are particularly exposed to the impacts of pollution and global warming [...]

Published
2016
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5. Does the chronic chemical contamination of a European flounder population decrease its thermal tolerance?

Author

David Mazurais, José-Luis Zambonino-Infante, Nicolas Le Bayon, Jean Laroche, Isabelle Calves, Guy Claireaux, Edouard Lavergne, Nicolas Pédron, Chantal Cahu, Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Unité Physiologie Fonctionnelle des Organismes Marins, ANR-10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010), and ANR-08-VULN-0004,EVOLFISH,Effects of global warming and contamination on the evolutionnary response of two coastal fishes(2008)

Subjects
Population Dynamics, Thermal stress, Flounder, Aquatic Science, Oceanography, Acclimatization, Condition factor, Animal science, Chronic pollution, Stress, Physiological, Immune Tolerance, Juvenile, Animals, Water Pollutants, 14. Life underwater, EUROPEAN FLOUNDER, geography, European flounder, geography.geographical_feature_category, biology, ACL, Temperature, Estuary, Contamination, biology.organism_classification, Pollution, Population Decrease, Platichthys, Fishery, Liver, Gene expression, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Estuaries, Tolerance, Environmental Monitoring
Abstract

Juvenile flounders (Platichthys flesus), collected in two estuaries with similar temperature regimes (the heavily polluted Seine and the moderately contaminated Vilaine), were submitted to a common garden experiment. After an acclimation period, both populations were challenged by a thermal stress (9-24 degrees C for 15 days, then maintenance at 24 degrees C for 19 days). The condition factor of the Vilaine fish increased in both conditions, while it decreased for the heated Seine flounders after 34 days. The expression of genes related to the energetic metabolism was measured in the liver. The expression levels for ATP-F0 and COII were significantly reduced for heated vs. standard fish from both estuaries, while a decrease of the 12S expression was detected only in heated vs. standard fish from the Seine estuary. Thus, it is suggested that highly contaminated fish from Seine could display a lower tolerance to thermal stress, compared to moderately contaminated fish from Vilaine.

Published
2015
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