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80’s population-specific compositions of two related anadromous shad species during the oceanic phase determined by microchemistry of archived otoliths 5
Nachón, David José; Bareille, Gilles; Drouineau, Hilaire; Tabouret, Helene; Taverny, Catherine; Boisneau, Catherine; Berail, Sylvain; Pécheyran, Christophe; Claverie, Fanny; Daverat, Françoise.
The specific stock composition and dispersion of anadromous fish species aggregations in the marine environment are poorly known, while they can play a major role in the metapopulation dynamics. Otolith microchemistry has proven to be a powerful tool to address natal origins of anadromous fish. We used archived otolith microchemistry to investigate the population-specific composition of European shads (Alosa alosa and Alosa fallax) subadults in the ocean during the 80’s. The allocation of natal origin was addressed relying on contemporary water and juveniles signatures within a Bayesian model. A great discrimination of natal origin was obtained at the Biscay Gulf scale. However, the discrimination of 80’s natal origin for the southern rivers with similar...
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Ano: 2019 URL: https://archimer.ifremer.fr/doc/00504/61562/65487.pdf
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Methylmercury bioconcentration in muscle tissue of the European eel (Anguilla anguilla) from the Adour estuary (Bay of Biscay, France) 5
Arleny, Ina; Tabouret, Helene; Rodriguez Gonzalez, Pablo Rodriguez; Bareille, Gilles; Donard, Olivier; Amouroux, David.
The life history of the European Eel (Anguilla anguilla) begins in the Sargasso Sea in the Atlantic Ocean where the Leptocephalus larvae drift with the gulf stream in order to reach European coastal waters. After their metamorphosis into transparent juveniles "glass" eels and an acclimatising phase in the estuaries, they migrate upstream into the rivers to become yellow eels (sub-adult stage). The yellow eels spend between 2 and 20 years of their lifetime in freshwater until they change into silver eels (adult stage) and finally migrate back to the Atlantic Ocean for spawning (Gomez-Mourelo, 2005). A. anguilla is thus an organism able to tolerate a wide range of environmental conditions, such as variations in oxygen availability, different ranges of...
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Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3072.pdf
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Qualité des milieux naturels 5
Legube, Bernard; Montigny, Frédéric; Bustamante, Paco; Bareille, Gilles; Baudrimont, Magalie; Cachot, Jerome; Guibaud, Gilles; Hechard, Yann; Labanowski, Jérôme; Lacoue-labarthe, Thomas; Mondamert, Leslie; Budzinski, Hélène; Prou, Jean; Gazeau, Alain; Hulin, Agnès; Bunales, Rafaël; Villenave, Eric; Chabbi, Abad; Atteia, Olivier; Bouchon, Didier; Denaix, Agnès; Chery, Philippe; Pellerin, Sylvain; Rumpel, Cornelia.
L’impact du changement climatique sur la qualité et la pollution des milieux est souvent négligé par rapport à d’autres impacts plus médiatisés (e.g. événements climatiques et hydrologiques extrêmes, santé, trait de côtes, disponibilité des ressources en eau…). Les eaux et l’air de Nouvelle-Aquitaine, et à moindre mesure les sols, déjà significativement pollués, subiront pourtant plusieurs détériorations significatives, qui sont présentées et discutées dans ce chapitre. Certains de ces effets sont déjà visibles et vont s’aggraver dans le contexte climatique prévu. Il s’agit principalement, pour l’eau douce superficielle, de l’augmentation de la température, de la diminution des débits des cours d’eau, de l’évolution des espèces aquatiques et du...
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Ano: 2018 URL: http://archimer.ifremer.fr/doc/00444/55578/57190.pdf
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The Great Melting Pot. Common Sole Population Connectivity Assessed by Otolith and Water Fingerprints 5
Morat, Fabien; Letourneur, Yves; Dierking, Jan; Pecheyran, Christophe; Bareille, Gilles; Blamart, Dominique; Harmelin-vivien, Mireille.
Quantifying the scale and importance of individual dispersion between populations and life stages is a key challenge in marine ecology. The common sole (Solea solea), an important commercial flatfish in the North Sea, Atlantic Ocean and the Mediterranean Sea, has a marine pelagic larval stage, a benthic juvenile stage in coastal nurseries (lagoons, estuaries or shallow marine areas) and a benthic adult stage in deeper marine waters on the continental shelf. To date, the ecological connectivity among these life stages has been little assessed in the Mediterranean. Here, such an assessment is provided for the first time for the Gulf of Lions, NW Mediterranean, based on a dataset on otolith microchemistry and stable isotopic composition as indicators of the...
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Ano: 2014 URL: https://archimer.ifremer.fr/doc/00284/39483/37973.pdf
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Variabilité et origine des apports détritiques dans le secteur indien de l'océan Austral au cours des derniers 30 000 ans 5
Manthe, Sandrine; Bareille, Gilles; Salvignac, Marie-eve; Labracherie, Monique; Lemoine, Flavien; Labeyrie, Laurent.
The surface water circulation variability in the southeastern Indian Sector has been investigated using micropalaeontological and isotopic analysis in a deep-sea core located near the Subantarctic Front. The frequency and intensity of iceberg and meltwater discharges have been studied by counting detrital grains >45 mu m, by determining their mineralogical composition, and by measuring delta(18)O in the planktonic foraminifera Neogloboquadrina pachyderma sinistral. The variability of hydrologic fronts was determined by estimating the sea surface temperatures (SST) using the Imbrie and Kipp foraminifera transfer function. Four iceberg discharge events were determined between 24 and 12 ka C-14 BP during the last glacial stage. Distinct but low magnitude...
Tipo: Text Palavras-chave: Océan Austral; Particules détritiques; Minéralogie; Icebergs; Southern Ocean; Ice-rafted-detritus; Mineralogy; Icebergs.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00220/33162/31670.pdf
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