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| Registros recuperados: 38 | |
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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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| Thomas, Yoann; Pouvreau, Stephane; Alunno-bruscia, Marianne; Barille, Laurent; Gohin, Francis; Bryere, Philippe; Gernez, Pierre. |
| Aim The spread of non-indigenous species in marine ecosystems world-wide is one of today's most serious environmental concerns. Using mechanistic modelling, we investigated how global change relates to the invasion of European coasts by a non-native marine invertebrate, the Pacific oyster Crassostrea gigas. Location Bourgneuf Bay on the French Atlantic coast was considered as the northern boundary of C. gigas expansion at the time of its introduction to Europe in the 1970s. From this latitudinal reference, variations in the spatial distribution of the C. gigas reproductive niche were analysed along the north-western European coast from Gibraltar to Norway. Methods The effects of environmental variations on C. gigas physiology and phenology were studied... |
| Tipo: Text |
Palavras-chave: Biogeographical range expansion; Crassostrea gigas; DEB model; European coasts; Functional traits; Global change; Individual-based model; Invasive species; Remote-sensing. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00287/39828/38459.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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| 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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| 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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| Dutertre, Mickael; Beninger, Peter G.; Barille, Laurent; Papin, Mathias; Haure, Joel. |
| The recent appearance and invasion of feral oysters (Crassostrea gigas) along the northern European Atlantic coast, underscores the necessity to investigate the relationship between environmental variables, reproductive physiology, larval development and recruitment. We studied these relationships at both high (HT) and intermediate (IT) - turbidity sites, through historical data on water temperatures, multi-parameter environmental probes, histological analyses, and field collections of planktonic larvae and settled post-larvae in 2005 and 2006. A progressive warming trend was observed, especially since 1995, when oyster proliferation first became severe. Threshold temperatures for oocyte growth, larval development and settlement were achieved in both 2005... |
| Tipo: Text |
Palavras-chave: Aquaculture; Climate warming; Coastal waters; Crassostrea gigas; Reproductive cycle; Oyster larvae; Settlement; Turbidity. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00000/11150/7938.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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| 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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| Dutertre, Mickael; Ernande, Bruno; Haure, Joel; Barille, Laurent. |
| Spatial and temporal variations in gill and palp size were studied during 1 year in naturally-settled populations of the Pacific oyster Crassostrea gigas, reciprocally transplanted between two contrasting sites located along a marked gradient of turbidity conditions. The variability of suspended particulate matter (SPM) and food particles, estimated by the concentration of chlorophyll-a, was measured with in situ water-quality probes. Over a full seasonal cycle, oysters exposed to high-turbidity (HT) conditions exhibited a lower gill-to-palp (G:P) ratio, compared with those exposed to low-turbidity (LT) conditions. Seasonal variations in the G:P ratio were observed at the LT site in relation to the spring phytoplanktonic bloom, but differed from those that... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00351/46223/46145.pdf |
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| Hernandez Farinas, Tania; Bacher, Cedric; Soudant, Dominique; Belin, Catherine; Barille, Laurent. |
| Relating environmental factors to species occurrence is a fundamental step in a better understanding of the community structure, the spatial and temporal dynamics of populations and how species may respond to environmental changes. In this paper, we used phytoplankton occurrence data, from a French national phytoplankton monitoring network, and environmental variables with the aim of characterizing the realized ecological niches of phytoplankton groups. We selected 35 phytoplankton taxa representing the most important taxa in terms of occurrence frequency and abundance along the French coast of the eastern English Channel, the Southern Bight of the North Sea and the Atlantic Ocean. We show that environmental variables such as nutrient concentration, water... |
| Tipo: Text |
Palavras-chave: Phytoplankton; Environment; Niche position; Tolerance; Kernel density; Outlying mean index. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00255/36627/35263.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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| Savelli, Raphael; Dupuy, Christine; Barille, Laurent; Lerouxel, Astrid; Guizien, Katell; Philippe, Anne; Bocher, Pierrick; Polsenaere, Pierre; Le Fouest, Vincent. |
| Microphytobenthos (MPB) from intertidal mudflats are key primary producers at the land–ocean interface. MPB can be more productive than phytoplankton and sustain both benthic and pelagic higher trophic levels. The objective of this study is to assess the contribution of light, mud temperature, and gastropod Peringia ulvae grazing pressure in shaping the seasonal MPB dynamics on the Brouage mudflat (NW France). We use a physical–biological coupled model applied to the sediment first centimetre for the year 2008. The simulated data compare to observations, including time-coincident remotely sensed and in situ data. The model suggests an MPB annual cycle characterised by a main spring bloom, a biomass depression in summer, and a moderate fall bloom. In early... |
| Tipo: Text |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00471/58226/60732.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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| Buzin, Florence; Baudon, Violaine; Cardinal, Mireille; Barille, Laurent; Haure, Joel. |
| Due to the important economic activity of oyster production in France, microalgal toxic events represent a significant constraint for shellfish farmers who face closures of bivalve production-sites. The frequency of closures of 3 weeks or less represents half of the total closures along the French coasts. Cold storage could be a simple and affordable solution for temporary and short-term storage before commercialisation. A stock of marketable Pacific oyster Crassostrea gigas was therefore stored during 22 days in non-immersed conditions at 3 degrees C with 100% humidity. At the end of the experiment, the oyster mortality rate remained at a low level of less than 3.5%. The sensory attributes, odour, appearance, texture and flavour, did not show significant... |
| Tipo: Text |
Palavras-chave: Quality control; Refrigeration; Sensory evaluation; Shelf life; Shellfish. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00041/15245/12840.pdf |
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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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| Registros recuperados: 38 | |
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