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| Registros recuperados: 38 | |
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| Deslous-paoli, Jean-marc; Heral, Maurice; Goulletquer, Philippe; Boromthanarat, Wilaiwan; Razet, Daniel; Garnier, Jacqueline; Prou, Jean; Barille, Laurent. |
| The study of cultivated ecosystems, once the trophic capacity ha! been determined and the molluscan stocks estimated, requires a knowledge of the evolution of the seasonal consumption of food by molluscs in natural conditions. For Crassostrea gigas, Mytilus edulis, Cerastoderma edule, Ruditapes philippinarum, the amount and quality of food have no effect on the filtration rate, except for the high load of mineraI seston. First an increase of the filtration rate was shown for Mytilus edulis and Cerastoderma edule at the end of winter and beginning of spring. Moreover Crassostrea gigas and Ruditapes philippinarum have shown no increase or only a small summer one. This evolution did not seem to be linked with the environmental conditions (temperature,... |
| Tipo: Text |
Palavras-chave: Natural food; Bivalves; Filtration rates; Nourritures naturelles; Bivalves; Taux de filtration. |
| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/1987/publication-3304.pdf |
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| Barille, Laurent. |
| L'aquaculture extensive de l'huitre japonaise Crassostrea gigas représente, avec 130 000 tonnes par an, la première ressource marine nationale (Heral, 1986). Le bassin de Marennes-Oléron, qui compte pour 40 % dans cette production, enregistre depuis vingt ans un ralentissement de la croissance des huîtres. La capacité trophique du bassin, production du phytoplancton et apport organique, ne permettrait pas une production optimale compte tenu du stock de mollusques actuel (Heral et al., 1990). Une partie de la réponse passe par une meilleure compréhension de l'adaptation trophique de Crassotrea gigas soumise dans ce milieu estuarien, à des variations marquées de la qualité et de la quantité de la nourri ture disponible. Dans le but de mieux comprendre les... |
| Tipo: Text |
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| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/00441/55211/56681.pdf |
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| Raillard, Olivier; Soletchnik, Patrick; Heral, Maurice; Prou, Jean; Bougrier, Serge; Razet, Daniel; Geairon, Philippe; Barille, Laurent; Guezennec, Loïc. |
| Les expérimentations on continu sur le site du Chapus au centre du bassin de Marennes-Oléron pendant le mois de mai 1991 et d'octobre 1991 ont permis de préciser la filtration des huîtres en fonction de la variabilité de la charge particulaire. Ces nouveaux résultats permettent d'affiner les modèles de croissance des huîtres. Un nouveau modèle de croissance phytoplanctonique permet de démontrer la sensibilité du bassin de Marennes-Oléron aux apports de nitrates provenant de la Charente, et leur impact sur la croissance des huîtres. L'étude des caractéristiques mécaniques des vases et des biodépôts ainsi que l'étude de l'agitation (houle et clapots, permet de modifier et de préciser les formulations d'un nouveau modèle de transport particulaire représentant... |
| Tipo: Text |
Palavras-chave: Séries en continu; Filtration; Crassostrea gigas; Modèle phytoplanctonique; Sédiment; Modèle de transport particulaire; Bassin de Marennes Oléron. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00048/15907/13335.pdf |
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| Barille, Laurent; Prou, Jean. |
| Ecophysiological experiments conducted in situ in the Bay of Marennes-Oléron during a spring and neap tide cycle in May 1991 , were designed to get a better representation of 2 important components of the energy budget of the Japanese oyster Crassostrea gigas : clearance rate and selection efficiency. The relationships previously established by Raillard et al. ( 1993) are re-evaluated by integrating the effects of high seston loads, typical of tidal effect within estuaries, on the physiological processes. For the clearance rate, the re-evaluated parameterization includes: - a negative effect of turbidity. - a clogging threshold set to 192 mg/l. Selection efficiency parameterizations are modified by incorporating : - a constant inorganic ingestion for... |
| Tipo: Text |
Palavras-chave: Matematical model; Oyster; Crassostrea gigas; Clearance rate; Seclection efficency; Marennes Oleron; Charente Maritime. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00102/21299/18913.pdf |
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| Barille, Laurent; Prou, Jean. |
| Feeding and growth of the Japanese oyster Crassostrea gigas is simulated by a deterministic model. However, physiological processes, estimated by statistical relationships, have not been tested under extreme environmental conditions such as high level of suspended particulate matter. Ecophysiological experiments were therefore conducted in situ in the Bay of Marennes-Oléron during a spring and neap tide cycle in May 1991, to get a better representation of 2 important components of the energy budget of the Japanese oyster: clearance rate and selection efficiency. The relationships previously established by Raillard et al. (1993) are re-evaluated by integrating the action of high seston load, typical of tidal effect within estuaries, on the physiological... |
| Tipo: Text |
Palavras-chave: Tidal cycles; Oysters culture; Growth; Feeding; Energy budget; Ecophysiology. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/1993/acte-3827.PDF |
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| Prou, Jean; Barille, Laurent; Heral, Maurice; Ratiskol, Gilles; Soletchnik, Patrick; Bougrier, Serge; Razet, Daniel; Geairon, Philippe. |
| During a fortnightly tidal cycle, a Mytilus edulis population was submitted to natural food conditions in the bay of Marennes-Oléron. During 4 tidal cycles, in vivo continuous measurements of turbidity and fluorescence were recorded to study the evolution of Total Particulate Matter (TPM), phaeopigments and chlorophyll-a concentrations. Turbidity in the water column is clearly influenced by resuspension of sediment. Degradated cells of phytoplankton were associated with sediments, involving strong correlation between phaeopigments and turbidity. High values of chlorophyll-a were encountered during neap tides when turbidity was low. No relation with resuspension processes were observed. No effect of fortnightly variability on retention was observed by... |
| Tipo: Text |
Palavras-chave: Ancova; Utilisation du matériel particulaire; Mytilus edulis; Moules. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/1994/publication-3079.pdf |
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| Barille, Laurent. |
| Recent feeding-physiology experiments have shown that the Japanese oyster Crassostrea gigas was able to operate a selection among inorganic and organic particles before ingestion. However, the underlying mechanisms are not well understood. Anatomical observations of different structures which may play a raie in the selection processes are brought together and submitted to the actual knowledge on bivalve feeding. The mantle lobes, the ciliary structure of the ordinary filaments, the marginal ventral groove and the labial palps are described. |
| Tipo: Text |
Palavras-chave: Nutrition; Crassostrea gigas; Huîtres; Ecophysiologie. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/1994/publication-3077.pdf |
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| Barille, Laurent; Heral, Maurice; Barilleboyer, Al. |
| An ecophysiological deterministic model of growth, reproduction and interactions between the bivalve and its estuarine environ ment was established for the Japanese oyster Crassostrea gigas. The environmental variables used in the model are: total particulate matter, particulate organic matter, particulate inorganic matter, chlorophyll, phaeopigments, proteins, lipids and carbohydrates. Rates of clearance, filtration, ingestion, absorption and respiration along with efficiencies of retention, selection and absorption are modelled with endogenous (dry weight of the animal, energy allocation between growth and reproduction) and exogenous variables (temperature, food quality and quantity). The model simulate the temporal evolution of two compartments: somatic... |
| Tipo: Text |
Palavras-chave: Crassoslrea gigas; Croissance; Écophysiologie; Modélisation; Turbidité; Crassostrea gigas; Ecophysiology; Growth; Modelling; Turbidity. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00038/14892/12219.pdf |
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| Cognie, B; Barille, Laurent. |
| Bivalves, by releasing inorganic nutrients, can stimulate the growth of the primary producers on which they feed. Dissolved excretion and mineralization of biodeposits (pseudofaeces and faeces), two indirect processes related to their feeding activity, have already been identified. This study investigated whether microalgal growth is also dependent on the mucus secreted by bivalves and rejected with their biodeposits. An experimental study based on algal growth tests was conducted to determine whether the mucus coating the pseudofaeces and faeces of the oyster Crassostrea gigas (Thunberg) could stimulate the growth of nine marine microalgae: a Prasinophyceae [Tetraselmis suecica (Butcher)] and eight Diatomophyceae [Amphora sp. (Ehrenberg), Chaetoceros sp.... |
| Tipo: Text |
Palavras-chave: Bivalve; Microphyte; Mucus; Fèces; Pseudofèces; Bivalve; Microalgae; Mucus; Faeces; Pseudofaeces. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00325/43607/43926.pdf |
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| Meleder, Vona; Barille-boyer, Anne-laure; Baud, Jean-pierre; Barille, Laurent; Cognie, Bruno; Rosa, Philippe. |
| The traditional fattening of the oyster Crassostrea gigas in oyster ponds of the French Atlantic Coast is submitted to natural environmental fluctuations. In order to reduce the growth variability of the soft parts of the bivalve, an intensive fattening process was developed, where the conditions of temperature, particulate organic and inorganic matter (POM and PIM) are controlled. This process relies on the production of the diatom Skeletonema costatum, which is then distributed to the oysters at an average concentration of 4–5 mg POM·L–1. An ecophysiological model of the oyster C. gigas, which simulates the evolution of somatic and gonad–reserve compartments, was applied to these conditions in order to analyse the bivalve responses. Experimentation was... |
| Tipo: Text |
Palavras-chave: Modélisation; Affinage; Ecophysiologie; Crassostrea gigas; Skeletonema costatum; Modelling; Oyster fattening; Ecophysiology; Crassostrea gigas; Skeletonema costatum. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00021/13248/10285.pdf |
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| Meleder-tard, Vona; Barille, Laurent. |
| Cette étude a pour cadre général le projet européen MESH (Mapping European Seabed Habitats) dont l'objectif principal est de fournir à la communauté une expertise scientifique et technique forte, aussi bien dans la collecte de données pour la cartographie d'habitats benthiques, que pour la production cartographique elle-même, ainsi que pour une bonne utilisation de ces cartes. L'action "Modélisation prédictive", qui est une des six actions menées au sein du projet MESH, a pour objectif de prédire l'occurrence d'habitats selon l'approche proposée par (Roff and Taylor 2000) c'est-à-dire en se basant sur la géophysique. En effet, la physique de l'environnement détermine la nature des communautés biologiques présentes aussi bien dans le temps que dans... |
| Tipo: Text |
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| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/00104/21567/19147.pdf |
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| Lassus, Patrick; Amzil, Zouher; Baron, Regis; Sechet, Veronique; Barille, Laurent; Abadie, Eric; Bardouil, Michele; Sibat, Manoella; Truquet, Philippe; Berard, Jean-baptiste; Gueguen, Marielle. |
| In October and November 2003 a bloom of the toxic dinoflagellate Alexandrium catenella was observed in the North-east zone of Thau lagoon (French Mediterranean coast). Sea water samples were collected every hours to evaluate time-related variations of phytoplankton concentrations and to compare the relative ratio of A. catenella versus other phytoplankton species during the outbreak. From these observations, trials using recirculated sea water systems were performed to: i) evaluate the physiological effects on oyster of increasing proportions of A. catenella within a mixed microalgal diet where the non-toxic diatom Thalassiosira weissflogii was present at concentration: 1500 cells ml(-1), ii) compare the effect of two temperatures (12 degrees C and 18... |
| Tipo: Text |
Palavras-chave: Mediterranean Sea; Alexandrium catenella; Toxin content; Model; Crassostrea gigas; Paralytic shellfish poisoning. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2624.pdf |
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| Gueguen, Marielle; Lassus, Patrick; Laabir, Mohamed; Bardouil, Michele; Baron, Regis; Sechet, Veronique; Truquet, Philippe; Amzil, Zouher; Barille, Laurent. |
| The occurrence of new phytoplankton species in a coastal area may be explained by the import of shellfish containing whole live algal cells in their digestive tracts. Indeed, shellfish containing toxic algal cells can induce both primary contaminations in safe areas ( initially free from toxic microalgae), and secondary contaminations of other shellfish growing in the same area via the faeces of the imported animals. To mitigate this problem, shellfish need to be placed in a separate holding tank and their intestinal content purged. For a deeper understanding of the risks associated with transferring contaminated shellfish, oysters ( Crassostrea gigas) and mussels ( Mytilus edulis) were purposely fed either Alexandrium minutum or A. catenella (... |
| Tipo: Text |
Palavras-chave: Risk assessment; Toxic phytoplankton; Uptake; Gut passage; Mytilus edulis; Crassostrea gigas. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-3897.pdf |
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| Dutertre, Mickael; Beninger, Peter G.; Barille, Laurent; Papin, Mathias; Rosa, Philippe; Barille, Anne-laure; Haure, Joel. |
| The proliferation of the voluntarily-introduced cupped oyster, Crassostrea gigas, has attained the proportions of species invasion in many intertidal habitats in Europe, presumably resulting from successful reproduction of farmed individuals. It is thus imperative to better understand the reproductive characteristics of farmed oysters, since they are directly under human control. We quantified the dry tissue mass (DTM), gametosomatic index (GSI), and reproductive cycle of farmed oysters at two sites in Bourgneuf Bay, France, in relation to environmental parameters using continuously-recording probes in 2005 and 2006. The GSI was developed for this study, based on the actual area occupied by gametes, rather than the area of the gonad previously used for... |
| Tipo: Text |
Palavras-chave: Atlantic Ocean; Crassostrea gigas; Oyster farming; Bivalve; Gametosomatic index; Biological invasion; Atresia; Oocytes; Turbidity; Temperature; Reproduction. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6871.pdf |
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| Registros recuperados: 38 | |
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