Gilles Bareille - Academia.edu (original) (raw)

Papers by Gilles Bareille

HAL (Le Centre pour la Communication Scientifique Directe), Oct 3, 2021

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

HAL (Le Centre pour la Communication Scientifique Directe), 2020

Science of The Total Environment, 2019

Strontium isotopic variations (87Sr:86Sr) were investigated in otoliths of an amphidromous goby, ... more Strontium isotopic variations (87Sr:86Sr) were investigated in otoliths of an amphidromous goby, Sicydium punctatum, coming from a tropical insular river and showing contrasted depositional patterns of bariumxalcium in otolith (Ba:Caotolith). In our study, varying as well as non-varying Ba:Caotolith individuals exhibited unchanged 87Sr:86Srotolith throughout the adult phase with values typical of stream water flowing through volcanic substrate (0.7053 ± 0.0003). These results unambiguously discard the Ba:Caotolith peaks as markers of migrations between freshwater and brackish estuarine water during the adult phase of the species and open on investigations of sources of variations on microhabitats or unknown physiological effects.

HAL (Le Centre pour la Communication Scientifique Directe), Mar 17, 2011

National audienc

Comptes Rendus Geoscience, Nov 1, 2002

Enrichments in authigenic uranium in glacial sediments of the Southern Ocean. Four sediment cores... more Enrichments in authigenic uranium in glacial sediments of the Southern Ocean. Four sediment cores from the Polar frontal zone and the Antarctic zone in the Indian sector of the Southern Ocean present an increase of authigenic uranium during glacial periods. We show that this increase in uranium is due to a combination of (i) an increase in the lateral transport of organic matter, (ii) a decrease in the oxygen in deep waters, and (iii) a process of diagenesis. It appears that uranium concentration cannot be used as a proxy of palaeoproductivity in the Southern Ocean, as previously suggested by

On a estime les variations glaciaire/ interglaciaire de la paleoproductivite dans le secteur indi... more On a estime les variations glaciaire/ interglaciaire de la paleoproductivite dans le secteur indien de l'ocean austral par l'intermediaire du bilan des flux biosiliceux. D'autre part les flux de detritiques ont ete utilises pour apprecier les variations des paleocirculations dans la meme region. Il semble que la variation de la paleoproductivite dans ce secteur n'a pu contribuer que tres modestement a la reduction du co#2 atmospherique. Les taux d'accumulation des detritiques et du materiel magnetique montre que les periodes froides sont caracterisees par un accroissement important des apports volcano-detritiques issus du plateau de kerguelen

Clay Minerals, Sep 1, 1990

R E SU M E : Le dosage de Topale biogene dans les sediments marins peut etre effectue par diffrac... more R E SU M E : Le dosage de Topale biogene dans les sediments marins peut etre effectue par diffractometrie X par la mesure des surfaces des bandes de diffusion et par la mesure des surfaces des pics de cristobalite. La surface de la bande de diffusion, observee sur les diagrammes X de sediments non chauffes, caracterise la concentration en composes amorphes (organiques et inorganiques). Elle permet de quantifier Topale biogene de sediments ne contenant que peu ou pas d^morphes non biogenes. La surface du pic de cristobalite, obtenu par transformation de Topale biogene par chauffage a 1050-1100°C pendant 12 h, permet de doser la silice biogene de divers sediments. Ces deux approches methodologiques ont ete appliquees aux sediments d'une carotte (MD 84-527) prelevee dans le secteur ouest-Indien de TOcean Austral. Ce materiel, qui a enregistre la sedimentation des 40,000 dernieres annees, ne renferme qu^accessoirement des constituants amorphes volcaniques. Les concentrations en silice biogene sont obtenues avec une precision de ±10%. Le comptage des diatomees par observation au microscope a ete egalement realise sur les memes sediments. Les courbes des teneurs en opale biogene obtenues par les deux methodes sont comparables et se correlent bien a Tabondance totale des diatomees. A B S T R A C T : The XRD peak of cristobalite (4-05 A) and diffuse X-ray scattering bands can be used for quantitative analysis of biogenic opal in marine sediments. For non-heated samples, diffuse bands are due to X-ray scattering by the whole amorphous fraction (organic and inorganic). For samples which contain little or no inorganic amorphous components, these diffuse bands can be used for quantitative analysis of biogenic opal. Conversely, heating at 1050-1100°C for 12 h causes biogenic silica to transform into cristobalite, and by measuring the area of the cristobalite peak, the amount of biogenic silica can be measured whatever the nature of the sediment. The two approaches (natural versus heated samples) have been used to study sediments cored in the western Indian part of the Southern Ocean. These sediments encompass the last 40,000 years and do not contain amorphous volcanic components. The content of biogenic silica has been obtained with an accuracy of ± 10%. The curves of opal abundance variation along the core obtained from the two X-ray methods and micropaleontologic counting are very similar.

Marine Chemistry, Apr 1, 2003

Published scavenging models generally assume that the 231 Pa/ 230 Th ratios of surface sediments ... more Published scavenging models generally assume that the 231 Pa/ 230 Th ratios of surface sediments are primarily determined by the mass flux of particles. In this study we compare the 230 Th normalized vertical fluxes of both total sediments and opal to the 231 Pa/ 230 Th ratios measured from six sediment cores sampled across the Antarctic Circumpolar Current (ACC). We observe a better correlation between the 231 Pa/ 230 Th ratios and the vertical opal fluxes corrected for dissolution than with total sediment vertical fluxes. This observation indicates that opal may explain the enhanced scavenging of 231 Pa. This result is consistent with the studies of Loeff and Berger [Deep-Sea Res. 40 (2) (1993) 339], Kumar et al. [Nature 378 (1995) 675] and Walter et al. [Earth Planet. Sci. Lett. 149 (1997) 85] who speculated that opal may explain enhanced scavenging of 231 Pa. Finally, our results suggest that the 231 Pa/ 230 Th ratio is a reliable indicator of opal mass flux and can be used, taking some precautions, as a proxy for opal paleoproductivity in the Indian sector of the Southern Ocean.

Geology, 1998

Late Pleistocene variations of germanium to silicon ratios in marine diatom shells from sediment ... more Late Pleistocene variations of germanium to silicon ratios in marine diatom shells from sediment cores, (Ge/Si) opal , are coherent with the global isotope record of glacial to interglacial climate change. These variations are thought to reflect changes in (Ge/Si) seawater driven by climatemodulated alterations in oceanic Ge/Si sources and sinks. However, an important criterion for interpreting (Ge/Si) opal as a monitor of whole ocean (Ge/Si) seawater is that the opal burial ratio be insensitive both to local diatom production and surface ocean silica concentrations (so-called biological fractionation effects) and to differential dissolution artifacts (so-called diagenesis offsets). Here we test these assumptions by comparing model ocean sediment (Ge/Si) opal distributions with data from Holocene and glacial sediments across the high-latitude Indian-Antarctic Ocean siliceous ooze belt. In contrast to the model, the data show no gradients in either Holocene or glacial (Ge/Si) opal values across productivity zones displaying dramatic changes in biosiliceous production, opal burial, and dissolution. This evidence supports the contention that fractionation effects are small and that observed down-core variations in (Ge/Si) opal faithfully record secular changes in (Ge/Si) seawater .

Journal of Environmental Monitoring, 2007

The background levels, variability, partitioning and transport of eleven trace elements-Ag, Al, A... more The background levels, variability, partitioning and transport of eleven trace elements-Ag, Al, As, Cd, Co, Cr, Cu, Mn, Pb, Zn and U-were investigated in a mountain range river system (Adour River, France). This particular river system displayed a turbulent hydrodynamic regime, characterized by flash-transient discharge conditions leading to fast shifts in suspended particulate matter (SPM) concentrations as high as two orders of magnitude (12 to 600 mg l(-1)). The distribution of SPM was accurately predicted with a "hysteresis" transport model, indicating that about 75% of the annual solids load was exported within 20 to 40 days. Dissolved and particulate concentrations of most trace elements were low compared to their concentrations in other reference river systems expect for Pb and Cr, associated with historical anthropogenic activities. Although dissolved and particulate metal concentrations were steady for most elements during low and average discharge conditions, significant changes were observed with increasing river discharge. The changes in trace element concentrations in the two compartments was found to induce a partitioning anomaly referred to as the particulate concentration effect. This anomaly was significant for Cr, Mn, Pb, Zn, Cu and organic carbon (p < 0.03). The processes driving this anomaly were possibly linked to the modification and/or increase of colloidal organic and inorganic vectors, suggested by the significant increase of DOC (p < 0.001) and dissolved Al concentrations (p < 0.05) during flood conditions. A complementary process linked to the influence of coarse particles of low complexation capacity and transported mainly during high discharge may also effect trace element concentrations. Annual metal fluxes transported by this river system were estimated using the hysteresis SPM model with consideration of these fate processes. Metals in the Adour River system are primarily exported into the Bay of Biscay (Atlantic Ocean).

HAL (Le Centre pour la Communication Scientifique Directe), 2012

and isotopic (87 Sr: 86 Sr) profiles from several annual cohorts of juvenile Atlantic salmon Salm... more and isotopic (87 Sr: 86 Sr) profiles from several annual cohorts of juvenile Atlantic salmon Salmo salar were related to the physico-chemical characteristics (chemical signatures, flow rate, temperature and conductivity) of their natal rivers over an annual hydrological cycle. Only Sr:Ca, Ba:Ca and 87 Sr: 86 Sr in otoliths were determined by their respective ratios in the ambient water. Sr:Ca ratios in stream waters fluctuated strongly on a seasonal basis, but these fluctuations, mainly driven by water flow regimes, were not recorded in the otoliths. Otolith Sr:Ca ratios remained constant during freshwater residency at a given site and were exclusively related to water Sr:Ca ratios during low flow periods. While interannual differences in otolith elemental composition among rivers were observed, this variability was minor compared to geographic variability and did not limit classification of juveniles to their natal stream. Success in discriminating fish from different sites was greatest using Sr isotopes as it remained relatively constant across years at a given location.

HAL (Le Centre pour la Communication Scientifique Directe), Nov 8, 2019

Eau (DGEAU) du canton de Genève. Merci à Messieurs Frédéric Hofmann (DGE), Dimitri Jaquet (DGEAU)... more Eau (DGEAU) du canton de Genève. Merci à Messieurs Frédéric Hofmann (DGE), Dimitri Jaquet (DGEAU) et Daniel Hefti (OFEV) qui ont soutenu ce projet dès le départ. Merci aux personnes qui ont participé aux échantillonnages ou apporté leur expertise dans le choix des stations, en particulier les gardes-pêche des cantons de Vaud, Genève et du Valais. Merci à la station INRA UMR CARRTEL pour la mise à disposition de la collection d'otolithes de truites lacustres. Merci également aux étudiants qui ont aidé au travail fastidieux d'extraction et de préparation des otolithes et des écailles et à Laure Vigier pour son appui SIG. Nous remercions enfin M. Yvon Crettenand (Service Chasse, Pêche et Faune du canton du Valais), l'AAPPMA du Chablais Genevois, la Fédération des AAPPMA de Haute-Savoie, ainsi que toutes les personnes bénévoles qui nous ont permis de prélever les échantillons nécessaires à nos analyses. Nous remercions aussi M. Marc-Antoine Colleu pour les préparations d'otolithes et d'écailles, M. Labedan recruté en CDD dans le cadre du projet, ainsi que les ingénieurs du LCABIE, C. Pécheyran, S. Berail, H. Tabouret et A. Holub pour leur assistance dans la préparation, l'analyse et le traitement des données microchimiques. Merci aussi à O. Gilbert pour son implication dans la gestion administrative du projet au sein de l'IPREM.

HAL (Le Centre pour la Communication Scientifique Directe), 2014

HAL (Le Centre pour la Communication Scientifique Directe), Nov 8, 2019

Recherche de l'origine natale des truites du Léman à partir de la composition géochimique des oto... more Recherche de l'origine natale des truites du Léman à partir de la composition géochimique des otolithes. Rapport final. 49p.

HAL (Le Centre pour la Communication Scientifique Directe), 2007

- The concentrations often trace elements (barium, cadmium, cobalt, copper, lead, manganese, nick... more - The concentrations often trace elements (barium, cadmium, cobalt, copper, lead, manganese, nickel, strontium, vanadium and zinc) were determined in the whole-body or glass eels caught in the Adour estuary, and exhibiting different levels of activity in laboratory. Glass eels that become "active" in response to a decrease in light intensity in flume present significantly lower values than those remaining buried in the substratum for Pb (p = 0.010) and Zn (p = 0.049). Results are discussed in relation to migratory behaviour.

HAL (Le Centre pour la Communication Scientifique Directe), Oct 3, 2021

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

HAL (Le Centre pour la Communication Scientifique Directe), 2020

Science of The Total Environment, 2019

Strontium isotopic variations (87Sr:86Sr) were investigated in otoliths of an amphidromous goby, ... more Strontium isotopic variations (87Sr:86Sr) were investigated in otoliths of an amphidromous goby, Sicydium punctatum, coming from a tropical insular river and showing contrasted depositional patterns of bariumxalcium in otolith (Ba:Caotolith). In our study, varying as well as non-varying Ba:Caotolith individuals exhibited unchanged 87Sr:86Srotolith throughout the adult phase with values typical of stream water flowing through volcanic substrate (0.7053 ± 0.0003). These results unambiguously discard the Ba:Caotolith peaks as markers of migrations between freshwater and brackish estuarine water during the adult phase of the species and open on investigations of sources of variations on microhabitats or unknown physiological effects.

HAL (Le Centre pour la Communication Scientifique Directe), Mar 17, 2011

National audienc

Comptes Rendus Geoscience, Nov 1, 2002

Enrichments in authigenic uranium in glacial sediments of the Southern Ocean. Four sediment cores... more Enrichments in authigenic uranium in glacial sediments of the Southern Ocean. Four sediment cores from the Polar frontal zone and the Antarctic zone in the Indian sector of the Southern Ocean present an increase of authigenic uranium during glacial periods. We show that this increase in uranium is due to a combination of (i) an increase in the lateral transport of organic matter, (ii) a decrease in the oxygen in deep waters, and (iii) a process of diagenesis. It appears that uranium concentration cannot be used as a proxy of palaeoproductivity in the Southern Ocean, as previously suggested by

On a estime les variations glaciaire/ interglaciaire de la paleoproductivite dans le secteur indi... more On a estime les variations glaciaire/ interglaciaire de la paleoproductivite dans le secteur indien de l'ocean austral par l'intermediaire du bilan des flux biosiliceux. D'autre part les flux de detritiques ont ete utilises pour apprecier les variations des paleocirculations dans la meme region. Il semble que la variation de la paleoproductivite dans ce secteur n'a pu contribuer que tres modestement a la reduction du co#2 atmospherique. Les taux d'accumulation des detritiques et du materiel magnetique montre que les periodes froides sont caracterisees par un accroissement important des apports volcano-detritiques issus du plateau de kerguelen

Clay Minerals, Sep 1, 1990

R E SU M E : Le dosage de Topale biogene dans les sediments marins peut etre effectue par diffrac... more R E SU M E : Le dosage de Topale biogene dans les sediments marins peut etre effectue par diffractometrie X par la mesure des surfaces des bandes de diffusion et par la mesure des surfaces des pics de cristobalite. La surface de la bande de diffusion, observee sur les diagrammes X de sediments non chauffes, caracterise la concentration en composes amorphes (organiques et inorganiques). Elle permet de quantifier Topale biogene de sediments ne contenant que peu ou pas d^morphes non biogenes. La surface du pic de cristobalite, obtenu par transformation de Topale biogene par chauffage a 1050-1100°C pendant 12 h, permet de doser la silice biogene de divers sediments. Ces deux approches methodologiques ont ete appliquees aux sediments d'une carotte (MD 84-527) prelevee dans le secteur ouest-Indien de TOcean Austral. Ce materiel, qui a enregistre la sedimentation des 40,000 dernieres annees, ne renferme qu^accessoirement des constituants amorphes volcaniques. Les concentrations en silice biogene sont obtenues avec une precision de ±10%. Le comptage des diatomees par observation au microscope a ete egalement realise sur les memes sediments. Les courbes des teneurs en opale biogene obtenues par les deux methodes sont comparables et se correlent bien a Tabondance totale des diatomees. A B S T R A C T : The XRD peak of cristobalite (4-05 A) and diffuse X-ray scattering bands can be used for quantitative analysis of biogenic opal in marine sediments. For non-heated samples, diffuse bands are due to X-ray scattering by the whole amorphous fraction (organic and inorganic). For samples which contain little or no inorganic amorphous components, these diffuse bands can be used for quantitative analysis of biogenic opal. Conversely, heating at 1050-1100°C for 12 h causes biogenic silica to transform into cristobalite, and by measuring the area of the cristobalite peak, the amount of biogenic silica can be measured whatever the nature of the sediment. The two approaches (natural versus heated samples) have been used to study sediments cored in the western Indian part of the Southern Ocean. These sediments encompass the last 40,000 years and do not contain amorphous volcanic components. The content of biogenic silica has been obtained with an accuracy of ± 10%. The curves of opal abundance variation along the core obtained from the two X-ray methods and micropaleontologic counting are very similar.

Marine Chemistry, Apr 1, 2003

Published scavenging models generally assume that the 231 Pa/ 230 Th ratios of surface sediments ... more Published scavenging models generally assume that the 231 Pa/ 230 Th ratios of surface sediments are primarily determined by the mass flux of particles. In this study we compare the 230 Th normalized vertical fluxes of both total sediments and opal to the 231 Pa/ 230 Th ratios measured from six sediment cores sampled across the Antarctic Circumpolar Current (ACC). We observe a better correlation between the 231 Pa/ 230 Th ratios and the vertical opal fluxes corrected for dissolution than with total sediment vertical fluxes. This observation indicates that opal may explain the enhanced scavenging of 231 Pa. This result is consistent with the studies of Loeff and Berger [Deep-Sea Res. 40 (2) (1993) 339], Kumar et al. [Nature 378 (1995) 675] and Walter et al. [Earth Planet. Sci. Lett. 149 (1997) 85] who speculated that opal may explain enhanced scavenging of 231 Pa. Finally, our results suggest that the 231 Pa/ 230 Th ratio is a reliable indicator of opal mass flux and can be used, taking some precautions, as a proxy for opal paleoproductivity in the Indian sector of the Southern Ocean.

Geology, 1998

Late Pleistocene variations of germanium to silicon ratios in marine diatom shells from sediment ... more Late Pleistocene variations of germanium to silicon ratios in marine diatom shells from sediment cores, (Ge/Si) opal , are coherent with the global isotope record of glacial to interglacial climate change. These variations are thought to reflect changes in (Ge/Si) seawater driven by climatemodulated alterations in oceanic Ge/Si sources and sinks. However, an important criterion for interpreting (Ge/Si) opal as a monitor of whole ocean (Ge/Si) seawater is that the opal burial ratio be insensitive both to local diatom production and surface ocean silica concentrations (so-called biological fractionation effects) and to differential dissolution artifacts (so-called diagenesis offsets). Here we test these assumptions by comparing model ocean sediment (Ge/Si) opal distributions with data from Holocene and glacial sediments across the high-latitude Indian-Antarctic Ocean siliceous ooze belt. In contrast to the model, the data show no gradients in either Holocene or glacial (Ge/Si) opal values across productivity zones displaying dramatic changes in biosiliceous production, opal burial, and dissolution. This evidence supports the contention that fractionation effects are small and that observed down-core variations in (Ge/Si) opal faithfully record secular changes in (Ge/Si) seawater .

Journal of Environmental Monitoring, 2007

The background levels, variability, partitioning and transport of eleven trace elements-Ag, Al, A... more The background levels, variability, partitioning and transport of eleven trace elements-Ag, Al, As, Cd, Co, Cr, Cu, Mn, Pb, Zn and U-were investigated in a mountain range river system (Adour River, France). This particular river system displayed a turbulent hydrodynamic regime, characterized by flash-transient discharge conditions leading to fast shifts in suspended particulate matter (SPM) concentrations as high as two orders of magnitude (12 to 600 mg l(-1)). The distribution of SPM was accurately predicted with a "hysteresis" transport model, indicating that about 75% of the annual solids load was exported within 20 to 40 days. Dissolved and particulate concentrations of most trace elements were low compared to their concentrations in other reference river systems expect for Pb and Cr, associated with historical anthropogenic activities. Although dissolved and particulate metal concentrations were steady for most elements during low and average discharge conditions, significant changes were observed with increasing river discharge. The changes in trace element concentrations in the two compartments was found to induce a partitioning anomaly referred to as the particulate concentration effect. This anomaly was significant for Cr, Mn, Pb, Zn, Cu and organic carbon (p < 0.03). The processes driving this anomaly were possibly linked to the modification and/or increase of colloidal organic and inorganic vectors, suggested by the significant increase of DOC (p < 0.001) and dissolved Al concentrations (p < 0.05) during flood conditions. A complementary process linked to the influence of coarse particles of low complexation capacity and transported mainly during high discharge may also effect trace element concentrations. Annual metal fluxes transported by this river system were estimated using the hysteresis SPM model with consideration of these fate processes. Metals in the Adour River system are primarily exported into the Bay of Biscay (Atlantic Ocean).

HAL (Le Centre pour la Communication Scientifique Directe), 2012

and isotopic (87 Sr: 86 Sr) profiles from several annual cohorts of juvenile Atlantic salmon Salm... more and isotopic (87 Sr: 86 Sr) profiles from several annual cohorts of juvenile Atlantic salmon Salmo salar were related to the physico-chemical characteristics (chemical signatures, flow rate, temperature and conductivity) of their natal rivers over an annual hydrological cycle. Only Sr:Ca, Ba:Ca and 87 Sr: 86 Sr in otoliths were determined by their respective ratios in the ambient water. Sr:Ca ratios in stream waters fluctuated strongly on a seasonal basis, but these fluctuations, mainly driven by water flow regimes, were not recorded in the otoliths. Otolith Sr:Ca ratios remained constant during freshwater residency at a given site and were exclusively related to water Sr:Ca ratios during low flow periods. While interannual differences in otolith elemental composition among rivers were observed, this variability was minor compared to geographic variability and did not limit classification of juveniles to their natal stream. Success in discriminating fish from different sites was greatest using Sr isotopes as it remained relatively constant across years at a given location.

HAL (Le Centre pour la Communication Scientifique Directe), Nov 8, 2019

Eau (DGEAU) du canton de Genève. Merci à Messieurs Frédéric Hofmann (DGE), Dimitri Jaquet (DGEAU)... more Eau (DGEAU) du canton de Genève. Merci à Messieurs Frédéric Hofmann (DGE), Dimitri Jaquet (DGEAU) et Daniel Hefti (OFEV) qui ont soutenu ce projet dès le départ. Merci aux personnes qui ont participé aux échantillonnages ou apporté leur expertise dans le choix des stations, en particulier les gardes-pêche des cantons de Vaud, Genève et du Valais. Merci à la station INRA UMR CARRTEL pour la mise à disposition de la collection d'otolithes de truites lacustres. Merci également aux étudiants qui ont aidé au travail fastidieux d'extraction et de préparation des otolithes et des écailles et à Laure Vigier pour son appui SIG. Nous remercions enfin M. Yvon Crettenand (Service Chasse, Pêche et Faune du canton du Valais), l'AAPPMA du Chablais Genevois, la Fédération des AAPPMA de Haute-Savoie, ainsi que toutes les personnes bénévoles qui nous ont permis de prélever les échantillons nécessaires à nos analyses. Nous remercions aussi M. Marc-Antoine Colleu pour les préparations d'otolithes et d'écailles, M. Labedan recruté en CDD dans le cadre du projet, ainsi que les ingénieurs du LCABIE, C. Pécheyran, S. Berail, H. Tabouret et A. Holub pour leur assistance dans la préparation, l'analyse et le traitement des données microchimiques. Merci aussi à O. Gilbert pour son implication dans la gestion administrative du projet au sein de l'IPREM.

HAL (Le Centre pour la Communication Scientifique Directe), 2014

HAL (Le Centre pour la Communication Scientifique Directe), Nov 8, 2019

Recherche de l'origine natale des truites du Léman à partir de la composition géochimique des oto... more Recherche de l'origine natale des truites du Léman à partir de la composition géochimique des otolithes. Rapport final. 49p.

HAL (Le Centre pour la Communication Scientifique Directe), 2007

- The concentrations often trace elements (barium, cadmium, cobalt, copper, lead, manganese, nick... more - The concentrations often trace elements (barium, cadmium, cobalt, copper, lead, manganese, nickel, strontium, vanadium and zinc) were determined in the whole-body or glass eels caught in the Adour estuary, and exhibiting different levels of activity in laboratory. Glass eels that become "active" in response to a decrease in light intensity in flume present significantly lower values than those remaining buried in the substratum for Pb (p = 0.010) and Zn (p = 0.049). Results are discussed in relation to migratory behaviour.