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| Registros recuperados: 23 | |
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| SAMPAIO,Dioniso de Souza; SANTOS,Maria de Lourdes Souza; TAGLIARO,Claudia Helena; BEASLEY,Colin Robert. |
| ABSTRACT Oyster culture has benefited traditional coastal communities along the Amazon macrotidal mangrove coast of Pará state in Brazil since 2006. Currently, seven oyster culture units in five municipalities are expanding production, but with no environmental monitoring, which is important for the control of the impacts of oyster culture on waters as well as for oyster management and conservation. Seasonal variation in environmental characteristics of the water was evaluated at all oyster culture units in Pará, from September to November 2013 (dry season) and February to April 2014 (wet season), to generate baseline data to evaluate future impacts and aid strategic planning, such as diversifying seed production. Salinity, dissolved oxygen, pH,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tropical mariculture; Crassostrea; Salinity; Water quality. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000400295 |
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| Sabry,R.C.; Magalhães,A R.M.. |
| Estudou-se a presença de parasitas e realizaram-se exames macroscópicos e histológicos em ostras (Crassostrea rhizophorae e Crassostrea gigas) cultivadas. Entre agosto de 2002 a maio de 2003, 30 indivíduos adultos de cada espécie foram coletados sazonalmente, totalizando 240 ostras. Os animais, provenientes de desova em laboratório, foram mantidos em lanternas de cultivo, em sistema suspenso tipo espinhel, com densidade de 40 ostras/andar. A cada coleta era registrada a mortalidade das ostras, a temperatura e a salinidade da água. A temperatura variou de 19 a 28,5°C e a salinidade, 31 a 35. A mortalidade foi de 48,3% para C. gigas e 70,8% para C. rhizophorae. A infestação pelo poliqueta Polydora websteri em C. gigas foi 100% durante todo o período e em C.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ostra; Crassostrea; Histopatologia; Parasita. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000800010 |
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| Mostajir, Behzad; Roques, Cecile; Bouvier, Corinne; Bouvier, Thierry; Fouilland, Eric; Got, Patrice; Le Floc'H, Emilie; Nouguier, Jean; Mas, Sebastien; Sempere, Richard; Sime-ngando, Telesphore; Troussellier, Marc; Vidussi, Francesca. |
| The impact of fish and oysters on components of the pelagic microbial food web (MFW) was studied in a 10 d mesocosm experiment using Mediterranean coastal waters. Two mesocosms contained natural water only ('Controls'), 2 contained natural water with Crassostrea gigas ('Oyster'), and 2 contained natural water with Atherina spp. ('Fish'). Abundances and biomasses of microorganisms (viruses, bacteria, phytoplankton, heterotrophic flagellates, and ciliates) were measured to estimate their contribution to the total microbial carbon biomass. Two MFW indices, the microbial autotroph: heterotroph C biomass ratio (A:H) structural index and the gross primary production: respiration ratio (GPP:R) functional index, were defined. In the Fish mesocosms, selective... |
| Tipo: Text |
Palavras-chave: Microbial food web; Virioplankton; Bacterioplankton; Phytoplankton; Protozooplankton; Crassostrea; Atherina; Autotrophy; Heterotrophy. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00284/39489/73675.pdf |
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| Clerissi, Camille; Guillou, Laure; Escoubas, Jean Michel; Toulza, Eve. |
| Background Microbiome of macroorganisms might directly or indirectly influence host development and homeostasis. Many studies focused on the diversity and distribution of prokaryotes within these assemblages, but the eukaryotic microbial compartment remains underexplored so far. Results To tackle this issue, we compared blocking and excluding primers to analyze microeukaryotic communities associated with Crassostrea gigas oysters. High-throughput sequencing of 18S rRNA genes variable loops revealed that excluding primers performed better by not amplifying oyster DNA, whereas the blocking primer did not totally prevent host contaminations. However, blocking and excluding primers showed similar pattern of alpha and beta diversities when protist communities... |
| Tipo: Text |
Palavras-chave: Holobiont; Metabarcoding; Microbiome; Ostreoida; Crassostrea. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00636/74799/75165.pdf |
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| Batista, Frederico M.; Lopez-sanmartin, Monserrat; Boudry, Pierre; Navas, Jose I.; Ruano, Francisco; Renault, Tristan; Fonseca, Vera G.; Leitao, Alexandra. |
| Cytogenetic abnormalities associated with viral infections, including from viruses of the Herpesvirales order, have been reported in vertebrate species. Ostreid herpesvirus 1 (OsHV-1) has been detected worldwide during mortality outbreaks of the Pacific oyster Crassostrea gigas. On the other hand, a high proportion of aneuploid cells in somatic tissues have been observed in C. gigas. In this study, we analysed the putative association between aneuploidy levels and the detection of OsHV-1 in gills of C. gigas, the Portuguese oyster C. angulata and their F1 hybrids cultured in Ria Formosa (Portugal). OsHV-1 was detected by PCR in 5.4% of the total of oysters analysed (n = 111) namely in 11.1%, 8.0% and 1.7% of C. gigas, C. angulata and F1 hybrid... |
| Tipo: Text |
Palavras-chave: Aneuploidy; Ostreid herpesvirus 1; Oyster; Crassostrea. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00215/32581/35759.pdf |
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| Boudry, Pierre; Saavedra, Carlos. |
| Dr. Boudry presented an overview of the current development of molecular tools in shellfish bivalves, focussing on the recent development in oysters, species to which the most efforts are dedicated. This review was prepared together with Dr. Saavedra (Mollusc Research Group, Torre de la Sal, Spain) within the Fish and Shellfish group of the EU Network of Excellence "Marine Genomics Europe". Searches in DNA sequence databank ("GenBank") show that 4% are microsatellite sequences, 23% are mitochondrial sequences and the remaining 73 % other nuclear sequences. Among these, 75% concern oyster (Crassostrea) species, 15% mussel (Mytilus) species and 10% scallop (Argopecten) species. Some of these sequences were targeted as candidate genes related to known... |
| Tipo: Text |
Palavras-chave: QTLs; Mitochondrial geneome; Crassostrea virginica; Crassostrea gigas; Crassostrea; Shellfish bivalves; Molecular tools; Genetic. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/acte-3480.pdf |
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| Lopez Flores, Inmaculada; De La Herran, R; Garrido Ramos, M; Boudry, Pierre; Ruiz Rejon, C; Ruiz Rejon, M. |
| We have analysed a centromeric satellite DNA family that is conserved in several commercial and non-commercial oyster species (Ostrea edulis, O. stentina, Crassostrea angulata, C gigas, C gasar, C ariakensis, C virginica and C sikamea). This satellite DNA family is composed of AT-rich repeat sequences of 166+/-2 bp and presents a 9-bp motif similar to the mammalian CENP-B box. The homology of oyster HindIII satellite DNA with satellite DNAs from other bivalves and its relation to a part of a mobile element suggest the existence of an ancient transposable element as a generating unit of satellite DNA in bivalve molluscs. Taking advantage of its degree of conservation in oyster species, we have used this element as a taxonomic marker. This marker clearly... |
| Tipo: Text |
Palavras-chave: Satellite DNA origin; Genetic identification; CENP B box; Crassostrea; Ostrea. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-761.pdf |
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| Boudry, Pierre; Naciri, Yamama; Collet, Bertrand; Cornette, Florence; Heurtebise, Serge; Ledu, Christophe; Chollet, Bruno; Phelipot, Pascal; Gerard, Andre. |
| Les objectifs pour l'année 1996 étaient les suivants: Poursuivre les premières reproductions des espèces pour lesquelles nous disposons de géniteurs GO. L'objectif est toujours de limiter le stockage d'animaux importés en produisant une descendance simultanément à des témoins C. gigas qui serviront de comparaison. Tenter des hybridations inter-spécifiques des différents taxons présents au sein du conservatoire en fonction des connaissances disponibles dans la littérature sur ce sujet (voir pour revue Gaffney et Allen, 1993). • Importer de nouvelles souches ou espèces. Élargir la gamme des espèces présentes au sein du conservatoire de souches (les capacités d'accueil de la salle de quarantaine étant Limitée). |
| Tipo: Text |
Palavras-chave: Génétique; Acclimatation; Hybridation; Crassostrea; Sélection génétique; Saccostrea commercialis. |
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/00044/15516/12903.pdf |
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| Boudry, Pierre; Naciri, Yamama; Launey, Sophie; Ledu, Christophe; Phelipot, Pascal; Heurtebise, Serge; Gerard, Andre. |
| Le laboratoire IFREMER "Génétique Aquaculture et Pathologie" (GAP) (La Tremblade et Bouin) a entrepris des actions de recherche sur ces différents points. L'Unité de Recherche en Génétique, en collaboration avec tous Ies membres du Réseau Génétique Mollusques (REGEMO) a axé une partie de ses travaux sur l'acclimatation et l'hybridation de différentes espèces du genre Crassostrea. Ces recherches ont débuté avec le soutien du Conseil Général de Charente-Maritime depuis 1992 sur des essais d'acclimatation de C. virginica, l'huître creuse américaine. En prolongement de cette étude, l'URGE a proposé à la région Poitou Charentes un programme de recherche plus vaste sur l'ensemble des espèces d'huîtres creuses. Le contrat de plan Etat-Région a été signé en... |
| Tipo: Text |
Palavras-chave: Génétique; Acclimatation; Hybridation; Crassostrea; Saccostrea; Génétique population. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00044/15517/12904.pdf |
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| Green, Timothy J.; Rolland, Jean-luc; Vergnes, Agnes; Raftos, David; Montagnani, Caroline. |
| The host-pathogen interactions between the Pacific oyster (Crassostrea gigas) and Ostreid herpesvirus type 1 (OsHV-1) are poorly characterised. Herpesviruses are a group of large, DNA viruses that are known to encode gene products that subvert their host’s antiviral response. It is likely that OsHV-1 has also evolved similar strategies as its genome encodes genes with high homology to C. gigas inhibitors of apoptosis (IAPs) and an interferon-stimulated gene (termed CH25H). The first objective of this study was to simultaneously investigate the expression of C. gigas and OsHV-1 genes that share high sequence homology during an acute infection. Comparison of apoptosis-related genes revealed that components of the extrinsic apoptosis pathway (TNF) were... |
| Tipo: Text |
Palavras-chave: Crassostrea; Anti-viral response; Apoptosis; Interferon-like; Poly I:C. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00279/39048/37610.pdf |
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| Delandes, Hélène. |
| En France, ainsi que dans de nombreux autres pays, l'histoire de l'ostréiculture est émaillée d'une succession de phases de développement, de surexploitation et d'apparition de maladies qui perturbent lourdement la profession. Depuis la disparition massive de l'huître portugaise, Crassostrea angulata, victime entre 1969 et 1971 d'une épidémie virale et l'effondrement de l'élevage de l'huître plate Ostrea edulis dû à deux parasitoses, la marteiliose et la bonamiose, l'ostréiculture française connaît actuellement une situation de monoculture de l'huître creuse japonaise Crassostrea gigas, suite à l'introduction de l'espèce entre 1971 et 1975 (Grizel & al. 1991). Pour tenter de remédier à cette situation de monoculture, qui reste une des inquiétudes... |
| Tipo: Text |
Palavras-chave: Génétique population; Phylogénie moléculaire; Huîtres creuses; Crassostrea; Acclimation. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00033/14380/11670.pdf |
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| Green, Timothy; Montagnani, Caroline; Benkendorff, Kirsten; Robinson, Nick; Speck, Peter. |
| Disease is caused by a complex interaction between the pathogen, environment, and the physiological status of the host. Determining how host ontogeny interacts with water temperature to influence the antiviral response of the Pacific oysters, Crassostrea gigas, is a major goal in understanding why juvenile Pacific oysters are dying during summer as a result of the global emergence of a new genotype of the Ostreid herpesvirus, termed OsHV-1 μvar. We measured the effect of temperature (12 vs 22 °C) on the antiviral response of adult and juvenile C. gigas injected with poly I:C. Poly I:C up-regulated the expression of numerous immune genes, including TLR, MyD88, IκB-1, Rel, IRF, MDA5, STING, SOC, PKR, Viperin and Mpeg1. At 22 °C, these immune genes showed... |
| Tipo: Text |
Palavras-chave: Crassostrea; OsHV-1; Water temperature; Antiviral response; Herpesvirus. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00162/27318/25674.pdf |
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| Boutet, Isabelle. |
| L'étude de la taxonomie des huîtres est longtemps restée basée sur des critères morphologiques (forme de la coquille et description des organes) et géographiques. Ces considérations sont relativement peu fiables en particulier au niveau interspécifique du fait de la plasticité des caractères morphologiques d'une part de des introductions d'espèces étrangères sur les lieux de culture d'autre part. La biologie moléculaire est donc, depuis quelques années, un outil très utilisé pour différencier les espèces d'huîtres. La phylogéographie des huîtres de la région sud-atlantique a ainsi pu être étudiée grâce à différentes méthodes de recherche du polymorphisme réalisées sur le fragment mitochondrial 16S. La PCR-RFLP, la SSCP et le séquençage ont été utilisés... |
| Tipo: Text |
Palavras-chave: Taxonomie; Huîtres creuses; Crassostrea; Phylogéographie; ADN. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00032/14365/11656.pdf |
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| Comps, Michel. |
| Des infections virales ont été décrites chez les huîtres portugaises Crassostrea angulata des côtes françaises successivement affectées par la maladie des branchies et par la mortalité massive de 19670. Ultérieurement, un nouveau virus a été trouvé chez Crassostrea gigas durant des mortalités dans la Baie d'Arcachon. Les virus impliqués ont des caractéristiques similaires pour ce qui concerne la taille, la morphologie, l'ultrastructure et la morphogénèse intracytoplasmique. Dans le cas des virus de mortalité, les cellules infectées du tissu interstitiel renferment une inclusion cytoplasmique et des granulations basophiles correspondant à un stroma virogène et à des particules. Les vibrions matures de structure icosaèdre mesurent 380 nm. Ils sont limités... |
| Tipo: Text |
Palavras-chave: Virologie; Infection virale; Huîtres creuses; Crassostrea. |
| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/00015/12659/9525.pdf |
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| Mazurie, Joseph. |
| The 14th International Conference on Shellfish Restoration (ICSR) comes this year to the United Kingdom for the first time in its 26 years history. The conference will be held at the University of Stirling in the heart of Scotland and its title and theme will be “Shellfish: our undervalued resource”. The theme of the conference, “Shellfish: our undervalued resource”, reflects the UK perception of shellfish as something that is good to eat, often in upmarket restaurants. Shellfish fisheries and aquaculture are indeed a very important part of the UK economy; shellfish reefs however form an ecosystem that provides myriad benefits (“ecosystem services”) many of which have been lost through acute fishing pressures, disease, pollution and other factors. On a... |
| Tipo: Text |
Palavras-chave: Coquillages; Restauration; Récif; Chesapeake; Crassostrea; Service écosystémique; Shellfish; Restoration; Reefs; Chesapeake; Wadden Sea; Marine; Crassostrea. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00045/15590/12992.pdf |
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| Registros recuperados: 23 | |
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