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Registros recuperados: 6
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Caractérisation génétique de l’effort reproducteur de l’huître creuse, Crassostrea gigas, dans le cadre des mortalités estivales de juvéniles : Approch QTL ArchiMer
Flahauw, Emilie.
The Pacific oyster, Crassostrea gigas, is a major aquacultured species whose production represents an economic interest at worldwide, european and french levels. However, this species undergoes summer mortalities recorded from the beginning of the 20th century and, since 2008, this phenomenon increased and threatens mainly juvenile oysters. Aquaculture production of oysters suffers consequences of mass mortalities, that’s why this phenomenon has been studied for many years. In France, the bacterium Vibrio splendidus and the Ostreid virus Herpes Virus 1 (OsHV-1) are often associated with mass mortality outbreaks of juveniles oysters and it was demonstrated that selected individuals for resistance to summer mortality were able to slow the increasing in viral...
Tipo: Text Palavras-chave: Huître creuse du Pacifique; Crassostrea gigas; Mortalités estivales; Survie; Effort reproducteur; Imagerie par Résonance Magnétique; Histologie; Marqueurs microsatellites; Marqueurs SNP; Cartographie de liaison; Détection de QTL; Pacific oyster; Crassostrea gigas; Summer mortality; Survival; Reproductive effort; Magnetif Resonance Imaging; Histology; Microsatellites; SNPs; Linkage mapping; QTL detection.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00233/34377/33786.pdf
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Génotypage des géniteurs de Lates calcarifer de Tahiti : aide à la domestication raisonnée du Loup Tropical pour la filière tahitienne ArchiMer
Vonau, Vincent; Rouxel, Catherine; Saulnier, Denis; Cochennec-laureau, Nathalie; Nedelec, Georges; Goyard, Emmanuel.
The tropical seabass Lates calcarifer was introduced in Tahiti in 1984 and then was domesticated without other introduction. Three successive generations have been obtained in captivity. Tissue samples of the 38 animaIs which represent the total Tahitian broodstock were preserved in alcohol to be genotyped with four microsatellite markers (Yue et al., 2001). Three of four described markers were successfully transferred to the laboratory of genetics of Tahiti (marker LcaM01, LcaM02, LcaM03), as the revelation technology available locally did not allow the use of LcaM04 in routine. The results show that the genetic diversity of the tahitian broodstock is not equivalent of the one of the species, which could be explained by the small size of the founder...
Tipo: Text Palavras-chave: Lates calcarifer; Marqueurs microsatellites; Reproducteurs; Variabilité génétique; Lates calcarifer; Microsatellite markers; Breeding stock; Genetic diversity.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/00142/25300/23372.pdf
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Impact génétique de la production intensive d'huîtres en écloserie : processus de dérive et de sélection liés aux pratiques d'élevage larvaire ArchiMer
Taris, Nicolas; Sauvage, Christopher; Boudry, Pierre.
Oysters, like many other marine bivalves, are characterized by high fertility and low survival rates during the precocious stages. Hatchery reproduction, realised in very different conditions than in their natural habitat (density, food, temperature, etc.), tends to optimize the production of larvae and juveniles. As a consequence, slow growing larvae are systematically culled. Previous results suggest the existence of a genetic variability linked to precocious development. Our approach consists in studying the evolutionary process (genetic drift and selection) linked with hatchery reproduction. Thanks to microsatellite markers enabling us to analyse the relatedness in "mixed" cultivated families, we studied the variability of breeding success in...
Tipo: Text Palavras-chave: Crassostrea gigas; Huîtres; Marqueurs microsatellites; Reproduction; Sélection; Dérive génétique; Variabilité génétique; Génétique.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/acte-3481.pdf
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Marqueurs microsatellites chez l'huître plate Ostrea edulis l. : caractérisation et applications à un programme de sélection pour une résistance au parasite Bonamia ostreae et à l'etude de populations naturelles ArchiMer
Launey, Sophie.
The flat oyster Ostrea edulis L. is the indigenous oyster of the Atlantic as well as the Mediterranean coasts of Europe. Its commercial exploitation dates back to Antiquity but its breeding is now threatened by two parasitic protozoa, among which Bonamia ostreae. Various aspects of the genetics of this species' natural and farmed populations have been studied with the aid of microsatellite markers. At first, the implementation and the screening of two partial genomic libraries made it possible to identify 28 new microsatellite loci. Analysis of the segregation of 12 of these loci and of two enzymatic loci shows that most microsatellite loci are transmitted in a Mendelian way, but some loci have significant segregation distortions. Moreover, seven linkage...
Tipo: Text Palavras-chave: Microsatellites markers; Parasite; Bonamia ostreae; Oyster; Ostrea edulis; Marqueurs microsatellites; Parasite; Bonamia ostreae; Huître; Ostrea edulis.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/1998/these-1919.pdf
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Towards the development of clonal lines in the European sea bass (Dicentrarchus labrax L.): application of uniparental reproduction techniques with an insight into sea bass eggs ArchiMer
Colleter, Julie.
Clonal lines are a powerful scientific tool for improved genetic characterization of organisms used in research. Inbred fish lines can be produced in only two generations using uniparental reproduction techniques. Androgenesis, achieved with variable success in several freshwater species, has been attempted in the European sea bass (Dicentrarchus labrax L), a marine fish of commercial and scientific interest. The low yields of progenies inheriting only the paternal genome after UV-irradiation of eggs led to considerations on the occurrence of UV screening compounds in pelagic eggs. Mycosporine-like amino acids and gadusol were found in many marine and freshwater organisms, but their occurrence in fish eggs was not clearly related to a behavioral pattern...
Tipo: Text Palavras-chave: Dicentrarchus labrax; Lignées clonales; Androgenèse; Gynogenèse; MAAs; Gadusol; Marqueurs microsatellites; Homozygotie; Hétérozygotie; Taux de recombinaison.; Dicentrarchus labrax; Clonal lines; Androgenesis; Gynogenesis; MAAs; Gadusol; Microsatellite markers; Homozygosity; Heterozygosity; Recombination rate..
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00300/41138/40326.pdf
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Traits biologiques et exploitation du bar commun Dicentrarchus labrax (L.) dans les pêcheries françaises de la Manche et du golfe de Gascogne. ArchiMer
Fritsch, Manon.
Sea bass Dicentrarchus labrax (Linné, 1758) is a fish of major interest in France and in the British Isles. It is the main target species for some anglers and a growing number of professional fishermen. In spite of this, the reproduction of sea bass in natural environment, the identification of its populations, as well as the fleet participating to and the level of its exploitation are poorly known. Thus, in the perspective of a future management of the bass fisheries, this thesis collected required data for the analysis of the sea bass resource in the English Channel and the Bay of Biscay. A first chapter describes to the principal biological and ecological characteristics of Dicentrarchus labrax. The five following chapters deal successively with: (i)...
Tipo: Text Palavras-chave: Fisheries management; Fisheries exploitation; Angling; Tagging; Microsatellite loci; Reproduction; Dicentrarchus labrax; Gestion de stocks; Exploitation; Pêche récréative; Pêcheries; Marquage; Marqueurs microsatellites; Reproduction; Dicentrarchus labrax.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/these-1088.pdf
Registros recuperados: 6
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