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Effet des conditions environnementales sur le développement des pathologies à Vibrio dans les élevages de crevettes en Nouvelle-Calédonie ArchiMer
Lemonnier, Hugues.
Shrimp aquaculture in New Caledonia is a developing industry, exclusively based on the species Litopenaeus stylirostris. However, it is subject to mortalities during grow out as observed all over the world. Since 1993, shrimp reared during the cold period are affected by a disease named "syndrome 93". As a consequence, the whole industry has become seasonal and produces essentially during the warm season. The climatic conditions during the periods of transition between the two main seasons could be responsible for an environmental stress and the origin reason for mortality outbreaks. Stocking density is the main risk factor. It increases the probability of the appearance and development of the epizooty in the pond. The "Summer Syndrome", a septicemic...
Tipo: Text Palavras-chave: New Caledonia; Risk factors; Environmental stress; Vibriosis; Epizooty; Pond management; Eutrophication; Pond health; Shrimp; Litopenaeus stylirostris; Peneids; Aquaculture; Nouvelle Calédonie; Facteur de risque; Stress environnemental; Vibrioses; Pratiques d'élevage; Eutrophisation; Santé de l'écosystème bassin; Crevette; Litopenaeus stylirostris; Pénéides; Aquacultre.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/these-2643.pdf
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Taxonomie et virulence de vibrions pathogènes d'huîtres creuses Crassostrea gigas ArchiMer
Le Roux, Frédérique.
As the emergence of new vibriosis in the European Atlantic coasts has been associated with mass mortalities of molluscs cuasing important economic losses, the project obectives are to provide knowledge and operational tools to evaluate the impact of vibriosis on farmed japenese oyster Crassostrea gigas. Facing the diversity of Vibrio species associated to bivalve disease outbreaks, the difficulties of identification and the detemrination of their pathogenic abilities we propose a double approach to correlate phenotype/geneotype of a bacteria with risk of disease : 1) by genotyping we will evaluate if specific strains are associated with disease. 2) by evaluating likely virulence mechanisms implicated in pathogenesis, we will characterise the genes...
Tipo: Text Palavras-chave: Taxonomie; Marqueur génétique; Pathogène; Génotype; Phénotype; Crassotrea gigas; Huître; Vibrioses; Diagnostique.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/these-3699.pdf
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