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| Lagarde, Franck; Fiandrino, Annie; Richard, Marion; Bernard, Ismael; Mortreux, Serge; Ubertini, Martin; Chiantella, Claude; Boj, Marie; Meddah, Slem; Leurion, Axel; Soriano, Solenn; Fuhrmann, Marine; Le Gall, Patrik; Chiera, Caroline; Berteaux, Tom; Guillou, Jean-louis; Roque D'Orbcastel, Emmanuelle; Perignon, Adeline; Bonnet, Delphine; Roques, Cecile; Bec, Beatrice; Cochet, Helene; Gervasoni, Erika; Miron, Gilles; Pouvreau, Stephane. |
| Since spat mortality events that were firstly detected in 2008, Mediterranean shellfish industry seeks to exploit the Pacific oyster spat from lagoon natural recruitment. The CRCM, Cepralmar and Ifremer developed accordingly a research project named PRONAMED Phase 1 and 2 - 2010-2014, in order to define the economic potential of spatfall and improve knowledge of the reproductive cycle of Crassostrea gigas in this specific environmental context. The results of the past three year‘s study (2012, 2013, 2014) showed that broodstock have the ability to provide larvae after sexual maturation and spawning. A coincidence was noted between moon phase (new and full moon) and spawnings with an amplifying effect of storms on the intensity of spawning (Ubertini et al.... |
| Tipo: Text |
Palavras-chave: Lagune; Recrutement; Naissain; Huître creuse; Ecologie larvaire; Cycle de reproduction; Captage naturel.; Lagoon; Recruitment; Spat; Pacific oysters; Larval ecology; Reproduction Cycle; Natural spat collection.. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00279/39054/37620.pdf |
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| Lagarde, Franck; Roque D'Orbcastel, Emmanuelle; Perignon, Adeline; Mortreux, Serge; Fuhrmann, Marine; Le Gall, Patrik; Leurion, Axel; Chiantella, Claude; Bec, Beatrice; Roques, Cecile; Bonnet, Delphine; Cochet, Helene; Boj, Marie; Gervasoni, Erika; Miron, Gilles; Fiandrino, Annie; Pouvreau, Stephane; Pernet, Fabrice. |
| We bring new items in connection with the origins of the natural recruitment variability of the Pacific oyster Crassostrea gigas in Thau lagoon. A poor relationship between " number of larvae" and "number of spat" in 2012 shows a biological lock around oysterculture areas during the metamorphosis in spite of better success of recruitment outside shellfish farming zone. A comprehensive analysis of environmental factors effects and the development of prognosis tools are planned to assist oysterfarmers in rationalization of natural oyster recruitment around Mediterranean lagoon. |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00165/27653/25822.pdf |
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| Mazurie, Joseph; Stanisiere, Jean-yves; Bouget, Jean-francois; Langlade, Aime; Leclerc, Emilie; Quinsat, Kevin; Herve, Gilles; Augustin, Jean-marie; Ehrhold, Axel; Sinquin, Jean-marc; Meidi-deviarni, Ika; Goubert, Evelyne; Cochet, Helene; Dreano, Alain. |
| This study (“Risco”), implicating both industry, socio-economic experts and biologists, was funded by the Regional Council of Brittany, for 3 years (2010-2012), to investigate about the causes of oysters (Crassostrea gigas) mortalities in the bay of Quiberon (South Brittany, France). The protocol including both a sonar and video visualization of the bottom, and a monthly survey of 15 experimental oyster structures, allowed to assess the risk due to predation. A clear spatial distribution of the predatory effect was evidenced, with starfish (Asterias rubens and Marthasterias glacialis) predominating in the North-East sector, and boring snails (Ocenebra erinacea and Pterophora inornata) in the South-Center area.. The main mortalities from these predators... |
| Tipo: Text |
Palavras-chave: Baie de Quiberon; Huître; Crassostrea gigas; Risque; Mortalité; Prédation; Étoiles de mer; Bigorneaux perceurs; Risco; Bay of Quiberon; Oyster; Crassostrea gigas; Risk; Mortality; Predation; Starfish; Oyster drills; Risco. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00180/29130/27534.pdf |
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| Mazurie, Joseph; Stanisiere, Jean-yves; Langlade, Aime; Bouget, Jean-francois; Dumas, Franck; Treguier, Cathy; Leclerc, Emilie; Ravaud, Emilie; Quinsat, Kevin; Gabellec, Raoul; Retho, Michael; Cochet, Helene; Dreano, Alain. |
| This study (“Risco”), implicating both industry, socio-economic experts and biologists, was funded by the Regional Council of Brittany, for 3 years (2010-2013), to investigate upon the origin of oysters (Crassostrea gigas) mortalities in the bay of Quiberon (South Brittany, France). Specific mortalities of adult oysters were recorded in this bay in 2006, whereas mortalities of one year old spat were observed since in 2008 in this bay as at a national scale. The experimental protocol in 2010, including a monthly survey of oyster batches at 15 experimental stations, allowed to assess the risk for one-year oysters, due to viral disease. A clear spatial distribution of this risk was evidenced, with a western area spared from contamination and mortality, and a... |
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Palavras-chave: Baie de Quiberon; Crassostrea gigas; Mortalité; Herpès-virus; OsHV-1; Épidémiologie; Modèle.; Quiberon bay; Crassostrea gigas; Mortality; Herpes-virus; OsHV-1; Epidemiology; Model. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00179/29043/27528.pdf |
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| Arzul, Isabelle; Baillon, Laury; Boudry, Pierre; Bouget, Jean-francois; Chollet, Bruno; Cochet, Helene; Couraleau, Yann; Dubreuil, Christine; Duchene, Julie; Dutartre, Julie; Garcia, Celine; Heloury, Purotu; Heurtebise, Serge; Huchet, Eve; Hussenot, Mathieu; Langlade, Aime; Ollier, Simon; Omnes, Emmanuelle; Pouvreau, Stephane; Roby, Charlotte; Serpin, Delphine; Viard, Frederique; Wacrenier, Candice; Lapegue, Sylvie. |
| L’huître plate (Ostrea edulis) est une espèce endémique des côtes européennes, elle est présente depuis des millions d’années. Son aire de répartition est très vaste allant de la Norvège jusqu’au Maroc. Elle est également présente en mer Méditerranée, en mer Noire, mais également au Canada, aux Etats-Unis ou encore en Afrique du Sud, à la suite d'introductions pour des raisons aquacoles. En France, à partir de la fin des années 70, de fortes mortalités ont été constatées sur les bancs naturels et en élevage, faisant rapidement chuter la production de 20 000 tonnes à 2 000 tonnes. Ces mortalités ont été attribuées à deux maladies parasitaires : la marteiliose (due au parasite Marteilia refringens) et la bonamiose (due au parasite Bonamia ostreae). Trente... |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00247/35815/34328.pdf |
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| Petton, Bruno; Riobe, Marion; Koechlin, Hugo; Queau, Isabelle; Mingant, Christian; Ratiskol, Dominique; Le Grand, Jacqueline; Petton, Sebastien; Thomas, Yoann; Alunno-bruscia, Marianne; Pouvreau, Stephane; Pernet, Fabrice; Maurer, Daniele; D'Amico, Florence; Lagarde, Franck; Mortreux, Serge; Roque D'Orbcastel, Emmanuelle; Mille, Dominique; Geay, A.; Bouquet, A.-l.; Cochet, Helene. |
| Depuis 2008, des mortalités massives d’huîtres creuses âgées de moins d’un an sont relevées sur le littoral français dès que la température de l’eau de mer atteint le seuil de 16°C. Ces mortalités de naissains sont associées à la détection du virus OsHV-1 μVar. Des travaux de qualification zoo-sanitaire menés depuis 2010 ont montré qu’un lot de naissains issus du captage naturel sur deux était infecté par le virus bien avant l’apparition des mortalités dans le milieu naturel, mais qu’a contrario les naissains d’écloserie expertisés présentaient un moindre risque de contamination. Dans le contexte de crise sanitaire chronique, l’objectif de notre étude était d’ obtenir une information qualitative relative au statut zoo-sanitaire OsHV -1 μ V ar des... |
| Tipo: Text |
Palavras-chave: Huitre creuse; OsHV - 1μVar; Epreuve thermique.; Maladie; Naissain; Pacific oyster; Spat; Disease; Thermal challenge; OsHV-1 μVar. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00276/38682/37180.pdf |
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