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| Registros recuperados: 181 | |
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| Lucas, Ronan; Courties, C.; Herbland, Alain; Goulletquer, Philippe; Marteau, Anne-laure; Lemonnier, Hugues. |
| In tropical shrimp ponds, the increasing of feed input, concomitantly with the stocking shrimp biomass, induces an eutrophication of the ecosystem. Although difficult to maintain, its stability is required to guarantee the success of the culture. A 110-day period of phytoplankton and bacterioplankton stock and dynamics in an earthen pond (1.2 ha area, 1 m depth) was monitored using flow cytometry to provide baseline information on community characteristics and ecosystem instability. Seven autotrophic cell types were identified over the whole sampling period. Prokaryotic cells included Synechococcus sp., a group named UNK which presented an atypical new flow cytometric signature and picoeukaryotes (PEUK). Nanophytoplankton cells were represented by 4... |
| Tipo: Text |
Palavras-chave: Tropical shrimp aquaculture; Ecosystem shift; Phytoplankton; Bacterioplankton; Vibrio; Flow cytometry. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00029/14068/11312.pdf |
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| Goulletquer, Philippe. |
| L’exploitation de la biodiversité marine, notamment via les biotechnologies, offre un réel potentiel de valorisation comme le démontre l'accélération des dépôts de brevets utilisant des substances actives marines. Ce point est renforcé par les particularités uniques de la biodiversité marine. Le défi à l’heure actuelle est de définir les conditions d’exploitation durable dans un contexte de connaissances limitées des écosystèmes concernés. Si les activités actuelles tendent à privilégier la préservation de l’environnement marin, le développement de connaissances et la levée de verrous technologiques permettront probablement à l’avenir d’identifier les ressources d’intérêt puis de les exploiter par des approches industrielles innovantes (e.g.,... |
| Tipo: Text |
Palavras-chave: Biodiversité; Ressources Marines; Biodiversité marine; Biotechnologies; Gestion; Exploitation. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00099/20987/18613.pdf |
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| Soletchnik, Patrick; Faury, Nicole; Razet, Daniel; Geairon, Philippe; Goulletquer, Philippe. |
| L'objectif des expérimentations 1996 a consisté à comparer en "instantané" le potentiel de croissance de C. gigas à différents stades de maturité sexuelle, selon une méthodologie ayant déjà fait ses preuves en laboratoire. En accord avec les résultats de 1995, on retrouve une fragilité de C. gigas autour de la période de ponte. En 1996, les principales fonctions physiologiques (respiration, filtration et absorption) sont étudiées sur deux cohortes et pour 4 stades de maturité sexuelle. La "fragilité physiologique" des huîtres porte sur le stade de maturation avancée pour la cohorte 1993 et sur le stade de post-ponte pour la cohorte 1994. La méthodologie de conditionnement a été confirmée par ces expérimentations. Cependant on doit à nouveau noter les... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Mortalité; Ecophysiologie; Modèle; Marennes Oléron. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00072/18362/15934.pdf |
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| Razet, Daniel; Faury, Nicole; Soletchnik, Patrick; Geairon, Philippe; Le Moine, Olivier; Goulletquer, Philippe. |
| Monitoring hydrology is an essential part of studying an ecosystem such as the Marennes-Oléron Bay. Since 1977, bimonthly samples have been taken from five stations in the bay. These samples provide important information on physical characteristics (temperature, oxygen, salinity), nutrients (NH4, NO3, NO2, SiO3, PO4) and particulate matter composition (seston, chlorophyll a and pheophytin). |
| Tipo: Text |
Palavras-chave: Hydrologie; Marennes Oléron; Hydrobiologie. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/1997/acte-3250.pdf |
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| Gollasch, Stephan; Kerckhof, Francis; Craeymeersch, Johan; Goulletquer, Philippe; Jensen, Kathe; Jelmert, Anders; Minchin, Dan. |
| The North American bivalve mollusc Ensis directus (Conrad, 1843) (Bivalvia, Pharidae) is native to the Northwest Atlantic coasts from southern Labrador to northern Florida (Bousfield, 1960; Theroux and Wigley, 1983; Swennen et al., 1985; Abbott and Morris, 2001; Turgeon et al., 2009; Vierna et al., 2013). This species has been introduced outside its native range, with the first confirmed record from the German Bight in 1979 (Cosel et al., 1982). Thereafter, a subsequent secondary range expansion took place, and the species is presently known to occur from Spain to Norway, including the UK (e.g. ühlenhardt - Siegel et al., 1983; Essink, 1985, 1986; Kerckhof and Dumoulin; 1987, Luczak et al., 1993; Rasmussen, 1996; Brattegard and Holthe, 1997; Eno et al.,... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00269/38007/36090.pdf |
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| Martin, Jean-louis; Haure, Joel; Thebault, Anne; Goulletquer, Philippe. |
| The evaluation of the ecological and economical consequences of the hydrocarbon pollution of the Erika implies the setting up of monitorings, analysis and experiments in the short, medium and long term. Among the consequences to be evaluated, a great deal of attention has to be paid to the direct impact on the biology and production performances of the main shellfish species as about 30% of the national production (around 130,000 tons of oysters and 60,000 tons of mussels per year) is cultivated in the impacted area. The main difficulty in evaluating the effects of the contaminants on a distinct part of the ecosystem which is mostly dominated by a cultured population dwells in the different approaches to set up as well as the variability of the answers... |
| Tipo: Text |
Palavras-chave: Pathologie; Ecophysiologie; Conchyliculture; Impact; Hydrocarbures; Pollution. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/acte-3308.pdf |
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| Heral, Maurice; Lucas, Albert; Deslous Paoli, Jean-marc; Goulletquer, Philippe; Masse, Henri; LABEIM (Laboratoire de Biologie et d'Ecologie des Invertébrés Marins). |
| En septembre 1984, MM. HERAL et DESLOUS-PAOLI organisèrent à La Tremblade, une "réunion méthodologie expérimentale mollusques". Cette rencontre faisait suite à un bref état qui s'était engagé au Congrès de Montpellier sur les "Bases biologiques de l'Aquaculture", où il était apparu que la terminologie et la méthodologie concernant le métabolisme des bivalves devaient être clarifiées. Grâce à une large information auprès des spécialistes français de la physiologie des bivalves, la réunion à La Tremblade a réuni un grand nombre de participants très motivés. Pendant 2 jours des discussions très animées ont permis de bien comprendre les échanges entre les bivalves et leur environnement et d'y jeter un regard neuf, ce qui impliquait une analyse critique du... |
| Tipo: Text |
Palavras-chave: Terminologie; Méthodologie; Bilan d'énergie; Physiologie; Bivalve; Terminology; Methodology; Energy budget; Physiology; Bivalve molluscs. |
| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/00014/12562/9432.pdf |
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| Buestel, Dominique; Ropert, Michel; Prou, Jean; Goulletquer, Philippe. |
| The history of French oyster culture consists of a succession of developmental phases using different species, followed by collapses caused by diseases. The indigenous species Ostrea edulis was replaced first with Crassostrea angulata, then C. gigas. France is now the top producer and consumer of oysters in Europe, producing around 120,000 t of the cupped oyster C. gigas annually, and an additional 1500 t of the flat oyster O. edulis. Cupped oysters are produced all along the French coast from natural and hatchery spat. Various structures are used to collect spat from the wild. After a growing-on period, oysters are Cultivated by three main methods: (1) on-bottom culture in the intertidal zone or in deep water, (2) off-bottom culture in plastic mesh bags... |
| Tipo: Text |
Palavras-chave: Cupped oyster; Flat oyster; Ostrea edulis; Crassostrea gigas; French production; Aquaculture. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-7396.pdf |
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| Heral, Maurice; Rothschild, Brian J .; Goulletquer, Philippe. |
| The historical landings of the oyster production are described for the Maryland part of the Chesapeake Bay. The different trends are analysed concurently with the main events and management strategies which occured on the bay. Three main periods are identified : - the greatest fishery from 1840 to 1890 with a large overfishing and the destruction of the oyster habitat caused by the oyster gears, - the decrease and stable landings from 1900 to 1980 due to the failure of the reseeding plan connected to the heavy sedimentation and the anoxic summer conditions, - the large decrease of the production (1981-1988) caused by high mortalities related to diseases (MSX and Perkinsus marinus) prédation and management practices. Alternative strategies for restoration... |
| Tipo: Text |
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| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/1990/acte-2393.pdf |
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| Soletchnik, Patrick; Goulletquer, Philippe; Cochennec, Nathalie; Renault, Tristan; Geairon, Philippe. |
| A population of Pacific ovsters, Crassostrea gigas, infected with a Chlamydia-like procaryote was reared to compare infection trends under three different feeding conditions: a starved condition, an intermediate condition with a diet of Skeletonema costatllm, and a mixed algal diet. Several physiological and pathological criteriJ: presence of gill abnormality; microscopic examination, basophilic intracytoplasmic inclusions, Feulgen reaction; condition index, filtration, food consumptiQn; fecal production and respiration were used to compare the various modalities one month after the initiation of the experiment. The Irodality of starved oysters showed reduce physiological performances in terms of scope for growth and condition index compared to oysters... |
| Tipo: Text |
Palavras-chave: Pathogen; Chlamydia; Procaryote; Crassostrea gigas; Oyster; Ecophysiology; Pathogène; Chlamydia; Procaryote; Crassostrea gigas; Huître; Ecophysiologie. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/1998/publication-2741.pdf |
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| Chai, Ai-ling; Homer, Mark; Tsai, Chu-fa; Goulletquer, Philippe. |
| Sampling efficiency of two oyster fishing gears, patent tongs and an oyster dredge, were compared in reference to diver-harvested quadrats in Chesapeake Bay, which supports important harvests of eastern oyster Crassosrrea virginica. Mean densities of spat (0$35 mm), small oysters (>35 mm to 75 mm), marketable oysters (>75 mm), and all oysters (three size-groups combined) estimated from patent tong samples were not significantly different from those derived from diver-harvested quadrat samples. In contrast, the densities estimated from dredge samples were low, only 2-32% of the diver estimates. Accordingly, patent tongs are recommended as the sampling gear for estimating eastern oyster stock abundance in the Maryland portion of Chesapeake Bay. |
| Tipo: Text |
Palavras-chave: Chesapeke Bay; Sampling efficiencies; Crassostrea virgnica; Oysters. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/publication-3065.pdf |
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| Grizel, Henri; Renault, Tristan; Cochennec, Nathalie; Tige, Gilbert; Audic, Guylaine; Pichot, Yves; Chollet, Bruno; Goulletquer, Philippe; Soletchnik, Patrick; Geairon, Philippe; Prou, Jean. |
| Le cheptel d'huîtres creuses, Crassostrea gigas, du Bassin de Marennes-Oléron a subi ces dernières années des morta lités (mai 88, mai 91, été 1992 et hiver 92-93). Les examens histopathologiques pratiqués durant celles-ci n'ont pas permis de déceler d'agents pathogènes. Les causes avaient été attribuées essentiellement, pour les premiers cas, à un manque de nourriture corrélé avec des conditions de sécheresse (donc un manque d'apport d'eau douce pour le bassin) et à des surcharges trop importantes des biomasses de fiItreurs, huîtres y compris. L'explication du dernier cas de mortalité survenue au cours de l'hiver serait d'un autre ordre: l'abaissement brutal des salinités, notamment dans les claires où étaient épurées soit des huîtres natives fragilisées,... |
| Tipo: Text |
Palavras-chave: Etude zoosanitaire; Mortalité; Epidémiologie; Pathologie; Marennes Oléron. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00050/16152/13635.pdf |
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| Goulletquer, Philippe; Wolowicz, Maciej; Latala, Adam; Geairon, Philippe; Huvet, Arnaud; Boudry, Pierre. |
| Respiration rates of various geographical strains of Crassostrea gigas were compared to assess the respiratory expenditure as a physiological indicator of catabolism (cost of maintenance). Parental oysters, sampled in France (Marennes-Oleron), Japan (Hiroshima), Taiwan (Tunkang) and Spain (Cadix), were differentiated by both their geographic origin and by mitochondrial DNA markers, allowing the distinction between the two closely related taxa Crassostrea gigas and Crassostrea angulata. After reproduction of these parental oysters, respiration rates of spat of each strain, reared under common controlled conditions, were individually estimated at 20 degrees C by using a volumetric microrespirometer. Our results demonstrated that physiological variability... |
| Tipo: Text |
Palavras-chave: Pacific Ocean; NE Atlantic; Oyster strains; Hybrids; Crassostrea angulata; Crassostrea gigas; Metabolism; Respiration rates; Océan Pacifique; Atlantique NE; Souches génétiques; Hybrides; Crassostrea angulata; Crassostrea gigas; Métabolisme; Taux de respiration. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/publication-859.pdf |
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| Le Moine, Olivier; Soletchnik, Patrick; Geairon, Philippe; Razet, Daniel; Faury, Nicole; Goulletquer, Philippe. |
| Since 1988, seasonal, chronic mortality (up to 30-40 %) has been occurring at oyster farms in the Marennes-Oléron Bay, namely at the Ronce and Perquis sand flats. The particular geographic position on the southern part of the bay, between the Seudre River and the Maumusson Strait, confers a relative specificity to these oyster farming areas. Production in this area is on the order of 8,000 to 10,000 t of the 30,000 t of oysters produced annually in the Bay. Although limited in surface area (180 ha out of a total of 4,500 ha), this high proportion of production can be attributed to the fact that this zone is mostly dedicated to the finishing process before commercialisation. Due to its economic importance, oyster farming is vital for local businesses. |
| Tipo: Text |
Palavras-chave: Marennes Oléron; Mortalités; Crassostrea gigas. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/1997/acte-3249.pdf |
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| Registros recuperados: 181 | |
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