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| Alfonso, Sebastien; Sadoul, Bastien; Gesto, Manuel; Joassard, Lucette; Chatain, Beatrice; Geffroy, Benjamin; Bégout, Marie-laure. |
| Coping styles consist of a coherent set of individual physiological and behavioral differences in stress responses that are consistent across time and context. Such consistent inter-individual differences in behavior have already been shown in European sea bass (Dicentrarchus labrax), but the associated mechanisms are still poorly understood. Here, we combine physiological measurements with individual behavioral responses in order to characterize coping styles in fish. Fish were tagged and placed in a tank for group risk-taking tests (GRT) at 8 months of age to evaluate boldness using the proxy latency of leaving a sheltered area towards an open area. A subsample of these fish were individually challenged 16 months later using an open field test (OFT), in... |
| Tipo: Text |
Palavras-chave: Personality; HPI axis; Gene transcription; Neurotransmitters. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00491/60282/63708.pdf |
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| Couturier, Christine; Rouault, Alice; Mckenzie, David; Galois, Robert; Robert, Serge; Joassard, Lucette; Claireaux, Guy. |
| The French Atlantic coast contains large highly productive intertidal mudflats that are colonised by juveniles of numerous flatfish species, including the common sole (Solea solea, L.). These ecosystems are also heavily exploited by the shellfish farming industry. Intensive bivalve culture is associated with substantial biodeposition (1-6 t-dw ha(-1) day(-1)), which directly or indirectly contributes to increase exopolysaccharide (EPS) concentrations at the interface between water column and seabed. EPS are long-chain molecules organised into colloids, which influence rheological properties of water, particularly viscosity. Increased water viscosity had consequences for ventilatory activity of juvenile flatfish, whereby the minimal pressure required to... |
| Tipo: Text |
Palavras-chave: EPS; Hypoxia; Metabolism; Water viscosity; Biodeposition; Solea solea. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2801.pdf |
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| Vignet, Caroline; Joassard, Lucette; Lyphout, Laura; Guionnet, Tiphaine; Goubeau, Manon; Le Menach, Karyn; Brion, Francois; Kah, Olivier; Chung, Bon-chu; Budzinski, Helene; Begout, Marie-laure; Cousin, Xavier. |
| The release of polycyclic aromatic hydrocarbons (PAHs) into the environment has increased very substantially over the last decades. PAHs are hydrophobic molecules which can accumulate in high concentrations in sediments acting then as major secondary sources. Fish contamination can occur through contact or residence nearby sediments or though dietary exposure. In this study, we analyzed certain physiological traits in unexposed fish (F1) issued from parents (F0) exposed through diet to three PAH mixtures at similar and environmentally relevant concentrations but differing in their compositions. For each mixture, no morphological differences were observed between concentrations. An increase in locomotor activity was observed in larvae issued from fish... |
| Tipo: Text |
Palavras-chave: Danio rerio; Polycyclic aromatic hydrocarbon; Offspring; Transgenerational effect; Heavy oil; Light crude oil; Locomotor activity; Photomotor response; Anxiety-like behavior. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00259/37030/35688.pdf |
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| Vignet, Caroline; Larcher, Thibaut; Davail, Blandine; Joassard, Lucette; Le Menach, Karyn; Guionnet, Tiphaine; Lyphout, Laura; Ledevin, Mireille; Goubeau, Manon; Budzinski, Helene; Begout, Marie-laure; Cousin, Xavier. |
| Polycyclic aromatic hydrocarbons (PAHs) constitute a large family of organic pollutants emitted in the environment as complex mixtures, the compositions of which depend on origin. Among a wide range of physiological defects, PAHs are suspected to be involved in disruption of reproduction. In an aquatic environment, the trophic route is an important source of chronic exposure to PAHs. Here, we performed trophic exposure of zebrafish to three fractions of different origin, one pyrolytic and two petrogenic. Produced diets contained PAHs at environmental concentrations. Reproductive traits were analyzed at individual, tissue and molecular levels. Reproductive success and cumulative eggs number were disrupted after exposure to all three fractions, albeit to... |
| Tipo: Text |
Palavras-chave: Polycyclic aromatic hydrocarbons; Zebrafish; Spawning success; Fertilization; Gonad differentiation; Molecular mechanisms. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00355/46641/46465.pdf |
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| Biais, Gerard; Leaute, Jean-pierre; Sauriau, Pierre-guy; Loizeau, Veronique; Robert, Serge; Lavesque, Nicolas; Lepareur, Fanny; Aubert, Fabien; Joassard, Lucette; Paticat, François; Roupsard, François. |
| La sole est la ressource halieutique qui contribue le plus aux débarquements en valeur des pêches réalisées dans le golfe de Gascogne (52 M € en 2007-09). Elle arrive aussi en première place dans les débarquements de la pêche charentaise (8 M € en 2007-09). Une flottille de grands fileyeurs spécialisés dans sa pêche s'est développée dans le golfe de Gascogne, dont certaines des unités les plus performantes sont basées à Royan. Le port de La Cotinière est l'un des premiers pour les débarquements de sole des chalutiers opérant dans le golfe de Gascogne. Cette espèce contribue aussi à l'équilibre financier annuel de nombreux petits bateaux côtiers. |
| Tipo: Text |
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| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00304/41547/40755.pdf |
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| Sauriau, Pierre-guy; De Montaudouin, Xavier; Gomez, Stéphane; Joassard, Lucette; Breret, Martine. |
| Les points forts des résultats acquis sur le chantier Marennes-Oléron au cours du programme LITEAU Crépidule sont énumérés : 1- Introduite dans le bassin de Marennes-Oléron à la fin des années soixante, Crepidula fornicata y a depuis colonisé principalement les bordures de chenaux et fonds subtidaux répondant à ses exigences écologiques. Ce nouveau biotope représente moins de 13% des surfaces de la baie pour un stock vivant ne dépassant pas quelques milliers de tonnes frais. De plus, du fait des opérations de nettoyage organisées depuis 1980 en baie de Marennes-Oléron, une relative stabilité du stock de crépidule est à noter dans cette baie depuis 25 ans. Ce n’est en revanche pas le cas du site de Fouras, où les opérations de nettoyage ne sont pas... |
| Tipo: Text |
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| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00032/14293/11572.pdf |
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| Feuillet-girard, Michelle; Gouleau, Dominique; Blanchard, Gérard; Joassard, Lucette. |
| Fluxes of nutrients (NH sub(4) super(+), NO sub(3) super(-), PO sub(4) super(3-) and Si(OH) sub(4)) were studied on an intertidal mudflat in Marennes-Oleron Bay, France, at two different seasons and at different times of the emersion period. Fluxes through the sediment-water interface were both calculated from vertical profiles of nutrient concentration in pore-water (diffusive fluxes, JD) and measured in light and dark benthic mini-chambers (measured fluxes, J sub(0)). Results indicate that ammonia was mainly released in summer while nitrate was mainly taken up in late winter. This uptake from the overlying water was probably due to the coupling of nitrification-denitrification within the sediment. The J sub(0) /J sub(D) ratio further indicates that... |
| Tipo: Text |
Palavras-chave: Estran vaseux; Flux de nutriments; Microphytobenthos; Bioturbation; Marennes-Oléron; Intertidal mudflat; Nutrient fluxes; Microphytobenthos; Bioturbation; Marennes-Oleron Bay. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00038/14893/12220.pdf |
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| Ramanoudjame, Laetitia; Rocancourt, Claire; Laine, Jeanne; Klein, Arnaud; Joassard, Lucette; Gartioux, Corine; Fleury, Marjory; Lyphout, Laura; Kabashi, Edor; Ciura, Sorana; Cousin, Xavier; Allamand, Valerie. |
| Collagen VI (COLVI), a protein ubiquitously expressed in connective tissues, is crucial for structural integrity, cellular adhesion, migration and survival. Six different genes are recognized in mammalians, encoding six COLVI-chains that assemble as two ‘short’ (α1, α2) and one ‘long’ chain (theoretically any one of α3–6). In humans, defects in the most widely expressed heterotrimer (α123), due to mutations in the COL6A1-3 genes, cause a heterogeneous group of neuromuscular disorders, collectively termed COLVI-related muscle disorders. Little is known about the function(s) of the recently described α4-6 chains and no mutations have been detected yet. In this study, we characterized two novel COLVI long chains in zebrafish that are most homologous to the... |
| Tipo: Text |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00297/40773/46351.pdf |
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