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| Registros recuperados: 20 | |
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| Suquet, Marc; Rimond, Flore; Cosson, J.; Wilson-leedy, J.; Lebrun, Luc; Queau, Isabelle; Mingant, Christian; Fauvel, Christian. |
| The movement characteristics of Pacific oyster trochophores have received very little coverage in the scientific literature. Described here are not only changes in the swimming characteristics of Crassostrea gigas trochophores (size: 53-77 mu m) in relation to time after fertilization and to inter-female variation but also the effects of salinity and pH on movement characteristics. The percentage of motile trochophores was measured on images obtained through a dissecting microscope and the Velocity Average Path (VAP) was assessed using a Computer Assisted Sperm Analysis (CASA) system. At 20 degrees C, the first movements of the trochophores were observed at 6.5 h post-fertilization. The mean (+/- SD) percentage of swimming trochophores and the VAP observed... |
| Tipo: Text |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00157/26786/24940.pdf |
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| Aubin, Joel; Gatesoupe, Joel; Labbe, Laurent; Lebrun, Luc. |
| Two probiotics were tested as alternative treatment to limit the prevalence of the vertebral column compression syndrome (VCCS) in rainbow trout, compared with a preventive treatment with florfenicol. Either the antibiotic, or a lactic acid bacterium, Pediococcus acidilactici, or a yeast, Saccharomyces cerevisiae var. boulardii, was introduced into experimental diets, which were compared with the control diet without supplementation. The antibiotic caused some mortality during the first week after treatment, likely because of the toxicity of the compound. However, this antibiotic treatment limited the occurrence of VCCS to 3%, vs. 13% of fish affected in the control group. Pediococcus acidilactici provided the same level of protection as the antibiotic,... |
| Tipo: Text |
Palavras-chave: Carnobacterium; Debaryomyces hansenii; Pseudomonas; Antibiotic; Lactic acid bacterium; Yeast; Spinal deformities. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-752.pdf |
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| Gonzalez-araya, Ricardo; Lebrun, Luc; Quere, Claudie; Robert, Rene. |
| Four microalgae species (Rhodomonas salina, Thalassiosira weissflogii, Thalassiosira pseudonana and Pavlova lutheri) were evaluated to estimate their potential as food for Ostrea edulis (L.) reproductive conditioning. Best ingestion and absorption were observed with R. salina (3.44 and 1.59 mg g− 1 h− 1, respectively), followed by T. pseudonana (2.75 and 0.98 mg g− 1 h− 1) and P. lutheri (2.40 and 0.91 mg g− 1 h− 1). Oysters fed T. weissflogii exhibited the lowest ingestion and absorption values (1.40 and 0.68 mg g− 1 h− 1). Proximate composition (proteins and carbohydrates) and lipid content (fatty acids and sterols) analysed in four main tissues (gonad, digestive gland, muscle and gills) also differed significantly with diet. Protein ranged from 355 mg... |
| Tipo: Text |
Palavras-chave: Ostrea edulis; Conditioning; Algal diets; Ingestion; Absorption; Biochemical composition. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00090/20092/17731.pdf |
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| Francois, Cyrille; Joly, Jean-pierre; Garcia, Celine; Lupo, Coralie; Travers, Marie-agnes; Tourbiez, Delphine; Chollet, Bruno; Faury, Nicole; Haffner, Philippe; Dubreuil, Christine; Serpin, Delphine; Renault, Tristan; Cordier, Remy; Hebert, Pascale; Le Gagneur, Eric; Parrad, Sophie; Gerla, Daniel; Cheve, Julien; Penot, Julia; Le Gal, Dominique; Lebrun, Luc; Le Gac-abernot, Chantal; Langlade, Aime; Bedier, Edouard; Palvadeau, Hubert; Grizon, James; Chabirand, Jean-michel; Robert, Stephane; Seugnet, Jean-luc; Rumebe, Myriam; Le Gall, Patrick; Bouchoucha, Marc; Baldi, Yoann; Masson, Jean-claude. |
| Créé en 1992, le réseau Repamo (REseau de PAthologie des MOllusques) est un réseau de surveillance de la santé des mollusques marins du littoral français. Son activité s’inscrit dans le cadre de la Directive Européenne 2006/88/CE. Repamo a pour objectif de détecter précocement les infections dues à des organismes pathogènes exotiques et émergents affectant les mollusques marins sauvages et d’élevage. L’étude des hausses de mortalités a été poursuivie avec 52 interventions complètes ayant conduit au recueil de commémoratifs et à la collecte d’échantillons de mollusques marins pour analyses en pathologie. Des hausses de mortalités d’huîtres creuses (Crassostrea gigas) (44 interventions) ont été recensées dans la majorité des bassins de production de mai à... |
| Tipo: Text |
Palavras-chave: Réseau Surveillance; Pathologie; Mollusques; Coquillages; Santé. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00197/30798/29167.pdf |
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| Song, Yun-peng; Suquet, Marc; Queau, Isabelle; Lebrun, Luc. |
| The quality of oyster spermatozoa has become an issue for modern aquaculture. However, reliable protocols used to assess gamete quality are lacking. The aim of this work is to define a standardised experimental fertilisation protocol for Pacific oyster oocytes. Six experiments have been carried out in this study. The optimal conditions for Pacific oyster experimental fertilisation have been defined: (1) oocytes can be conserved in seawater for at least 4 h before fertilisation. (2) oocyte concentration: 100-1000 ml(-1) seawater, (3) fertilisation volume: 10-100 nil, (4) spermatozoa: oocyte ratio: 400 to maintain discriminating conditions, (5) gamete contact time: longer than 10 mill and (6) fertilisation and incubation temperatures: both 19 degrees C. The... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Pacific oyster; Experimental; Fertilisation. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6231.pdf |
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| Suquet, Marc; De Kermoysan, Goulwen; Araya, Ricardo Gonzalez; Queau, Isabelle; Lebrun, Luc; Le Souchu, Pierrick; Mingant, Christian. |
| A reliable anaesthesia and sampling protocol for Pacific oysters will enable experiments to be conducted without sacrificing animals and will facilitate successive sampling of individuals for gametogenesis studies. As no such techniques were available for Crassostrea gigas, the present study aimed to define suitable anaesthetic conditions for use with this species. Three groups of ten oysters (mean weight +/- SD, 32.1 +/- 9.0 g) were anaesthetised in 5 L containers. Among different chemicals: benzocaine, eugenol and three different types of magnesium chloride (a laboratory one Flucka (R) - and two designed for agriculture - DEUSA International (R) and Dead SeaWorks (R)) and concentrations tested, one laboratory (concentration: 72 g L-1) and one... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Pacific oyster; Gonad sampling; Magnesium chloride; Relaxant; Anaesthesia. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6352.pdf |
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| Suquet, Marc; Gonzalez, Ricardo; Lebrun, Luc; Queau, Isabelle; Mingant, Christian; Robert, Rene. |
| Controlled reproduction of the European flat oyster requires the development of tools adapted to this species, including a practical anaesthesia and gonad sampling protocol to facilitate sex determination and the verification of gametogenesis. Three replicate groups of 10 oysters (mean weight +/- SD: 29.9 +/- 8.5 g) were anaesthetised in 5 L containers using magnesium chloride designed either for laboratory (Flucka (R)) or agricultural (Dead Sea Work (R): DSW) use, at two concentrations (50 or 72 g L-1). No significant differences were observed in the percentages of oysters anaesthetised or subsequent oyster mortality with the different anaesthetics or concentrations, but increasing water temperature from 14.9 to 18.8 degrees C significantly increased the... |
| Tipo: Text |
Palavras-chave: Oyster; Ostrea edulis; Anaesthesia; Magnesium chloride; Gonad sampling. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00018/12907/9876.pdf |
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| Lupo, Coralie; Osta Amigo, Axel; Fleury, Elodie; Robert, Stephane; Garcia, Celine; Arzul, Isabelle; Baillon, Laury; Bechemin, Christian; Canier, Lydie; Chollet, Bruno; Dechamps, Lucie; Dubreuil, Christine; Faury, Nicole; Francois, Cyrille; Godfrin, Yoann; Lapegue, Sylvie; Morga, Benjamin; Travers, Marie-agnes; Tourbiez, Delphine; Masson, Jean-claude; Verin, Francoise; Cordier, Remy; Gangnery, Aline; Louis, Wilfried; Mary, Charlotte; Normand, Julien; Penot, Julia; Cheve, Julien; Dagault, Francoise; Le Jolivet, Aurore; Le Gal, Dominique; Lebrun, Luc; Bellec, Gwenael; Bouget, Jean-francois; Cochennec-laureau, Nathalie; Palvadeau, Hubert; Grizon, James; Chabirand, Jean-michel; Pepin, Jean-francois; Seugnet, Jean-luc; D'Amico, Florence; Maurer, Daniele; Le Gall, Patrik; Mortreux, Serge; Baldi, Yoann; Orsoni, Valerie; Bouchoucha, Marc; Le Roy, Valerian; Pouvreau, Stephane; Queau, Isabelle; Lamoureux, Alice. |
| Depuis 1992, la surveillance de la santé des mollusques marins du littoral français est assurée par le réseau de Pathologie des Mollusques (Repamo). Ses activités s’inscrivent dans le cadre de la Directive Européenne 2006/88/CE. Depuis son évaluation par la plateforme nationale d’épidémiosurveillance en santé animale en 2012, l’objectif de surveillance est la détection précoce des infections dues à des organismes pathogènes exotiques et émergents affectant les mollusques marins sauvages et d’élevage. L’année 2015 est la première année de transition pour laquelle un début d’évolution des modalités de surveillance de la santé des mollusques marins animées par l’Ifremer a été amorcé. Un dispositif hybride de surveillance a été mis en place, s’appuyant sur... |
| Tipo: Text |
Palavras-chave: Réseau; Surveillance; Pathologie; Mollusques; Coquillages; Santé; Mortalité; Maladie. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00324/43486/42945.pdf |
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| Monfort, Patrick; Lebrun, Luc. |
| L’ostréiculture en baie de Morlaix demeure une activité emblématique du territoire qui contribue à sa notoriété ainsi qu’à son attractivité. Cette activité du secteur primaire, qui emploie 107 personnes en Equivalent Temps Plein (ETP), produit annuellement environ 7000 tonnes d’huîtres creuses et environ 90 tonnes d’huîtres plates ce qui représentent indéniablement un poids socio-économique significatif à l’échelon local. Le Comité Régional des Pêches Maritimes et des Elevages Marins (CRPMEM), après avoir engagé une évaluation du stock de bivalves fouisseurs (coques et palourdes) par un bureau d’études (Allain et Bernard 2015), a sollicité la Direction Départementale des Territoires et de la Mer (DDTM) du Finistère pour entreprendre une étude sanitaire de... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00372/48287/48387.pdf |
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| Derrien, Amelie; Terre Terrillon, Aouregan; Duval, Audrey; Lebrun, Luc; Doner, Anne; Rovillon, Georges-augustin; Amzil, Zouher; Le Bec, Claude. |
| En cas de fermeture de zone de production pour cause de présence d'une espèce de micro algues toxique, une mesure prévoit pour les professionnels de la conchyliculture l'interdiction générale d'utilisation de l'eau de mer déjà pompée dans un bassin insubmersible. C'est dans ce contexte que la DGAL a sollicité l'appui du LER BO pour la mise en place d'une étude dans des conditions professionnelles. Cette étude vise à déterminer d'il existe un risque de contamination lors de l'immersion de coquillages non contaminés dans un bassun insubmersible rempli en eau de mer pompée dans une zone fermée pour cause de présence de micro-algues toxiques. Entre fin juin et début juillet, la présence de Dinophysis sp a entraîné la fermeture de la baie de Concarneau. Des... |
| Tipo: Text |
Palavras-chave: Dinophysis; Toxines lipophiles; Acide okadaïque; Yessotoxines; Bassin insubmersible; Huîtres; Moules. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00486/59736/62831.pdf |
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| Suquet, Marc; Quere, Claudie; Mingant, Christian; Lebrun, Luc; Ratiskol, Dominique; Miner, Philippe; Cosson, Jacky. |
| Sperm characteristics of scallops have not been well described in the scientific literature. The effects of sperm release technique (thermal shock versus serotonin injection), of sperm collection technique (testis sampling versus serotonin injection), of sperm sampling location along the genital tract, of in vitro sperm maturation, and of time post activation on scallop sperm characteristics were assessed in the present work. Whatever sperm release technique used, no significant differences were observed regarding the percentage of motile spermatozoa and the velocity of the average path (YAP). Compared to testicular sperm, a higher percentage of motile spermatozoa, YAP and intracellular adenosine triphosphate (ATP) content were observed for sperm shed... |
| Tipo: Text |
Palavras-chave: Spermatozoa; CASA; Maturation; Sperm motility; Bivalve; Pecten maximus. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00157/26852/24983.pdf |
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| Le Bec, Claude; Le Gac-abernot, Chantal; Boulben, Sylviane; Demeule, Carole; Derrien, Amelie; Doner, Anne; Duval, Audrey; Lebrun, Luc; Terre Terrillon, Aouregan. |
| L’Ifremer coordonne, sur l’ensemble du littoral métropolitain, la mise en œuvre des réseaux d’observation et de surveillance de la mer côtière. Ce bulletin contient une synthèse et une analyse des données collectées par l’ensemble des réseaux pour le Finistère. Des représentations graphiques homogènes, assorties de commentaires, donnent des indications sur les niveaux et les tendances des paramètres mesurés. |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00642/75407/76214.pdf |
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| Registros recuperados: 20 | |
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