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Organization of the genital tract of the japanese oyster, Crassostrea gigas ArchiMer
Devauchelle, Nicole; Boussaid, Béchir; Le Pennec, Gael; Philip De Laborie, Loic; Salaun, Gilles; Dorange, Germaine.
Tipo: Text
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00049/16025/13486.pdf
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Quality assessment of cryopreserved black-lip pearl oyster Pinctada margaritifera spermatozoa ArchiMer
Demoy-schneider, Marina; Schmitt, Nelly; Le Pennec, Gael; Suquet, Marc; Cosson, Jacky.
High quality of sperm is essential to a high fertilization rate, especially post- cryopreservation. Assessment of sperm integrity, motility and energy reserves before cryopreservation is necessary for selection of milt with optimal fertilizing potential. We describe the effect of cryopreservation on the quality of black-lip pearl oyster, Pinctada margaritifera var. cumingii sperm. Evaluated quality indices of fresh and frozen/thawed P. margaritifera spermatozoa, included morphology, ultrastructure and motility characteristics relative to the energy content (ATP) and its capacity to be sustained by mitochondrial respiration. Morphology and ultrastructure were quantitatively evaluated using images obtained by optical microscopy assisted by the Image J...
Tipo: Text Palavras-chave: Spermatozoa quality; Cryopreservation; Pinctada margaritifera; Motility; Metabolism; CASA.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00453/56421/58114.pdf
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Vibrio tapetis, the Causative Agent of Brown Ring Disease, Forms Biofilms with Spherical Components ArchiMer
Rodrigues, Sophie; Paillard, Christine; Le Pennec, Gael; Dufour, Alain; Bazire, Alexis.
Vibrio tapetis is a marine bacterium causing Brown Ring Disease (BRD) in the Manila clam Ruditapes philippinarum. V. tapetis biofilm formation remains unexplored depite the fact that it might be linked to pathogenicity. Our objectives were to characterize the in vitro biofilm formation of V tapetis and evaluate the effects of culture conditions. Biofilm structure and its matrix composition were examined by confocal laser scanning microscopy and scanning electron microscopy. V tapetis was able to form biofilms on a glass substratum within 24 h. Polysaccharides and extracellular DNA of the biofilm matrixes were differently distributed depending on the V tapetis strains. Spherical components of about 1-2 mu m diameter were found at the biofilm surface. They...
Tipo: Text Palavras-chave: Vibrio tapetis; Biofilm; Brown Ring Disease; Ruditapes philippinarum; Spherical components; Temperature effect; Salinity effect.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00307/41783/42796.pdf
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