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Alimentation expérimentale de l'huître Crassostrea gigas à l'aide de navicules bleus Haslea ostrearia (Simonsen) de différentes tailles ArchiMer
Barille, Laurent; Bougrier, Serge; Geairon, Philippe; Robert, Jean-michel.
The influence on the feeding physiology (clearance, filtration, ingestion, absorption) of the Japanese oyster Crassostrea gigas of low concentrations of suspended particulate matter (SPM ranging from 2 to 20 mg.l-l) and high food quality (mean organic fraction =54 %) was studied in the laboratory. Experimental diets were made up with three strains of the "blue diatom" Haslea ostrearia, which is responsible of the greening of oyster-ponds. The strains were characterized by different sizes (48, 65 and 98 µm respectively) but possessed the same density and biochemical composition. Clearance rate was found constant at 2.2 1.h(-l).g-l dry weight and therefore was not influenced by increasing seston load. Pseudofaeces production was observed for SPM...
Tipo: Text Palavras-chave: Taille des particules; Qualité alimentaire; Haslea ostrearia; Crassostrea gigas; Alimentation; Particle size; Food quality; Haslea ostrearia; Crassostrea gigas; Feeding.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/publication-3070.pdf
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Angiospermes des côtes françaises Manche-Atlantique. Propositions pour un indicateur DCE et premières estimations de la qualité ArchiMer
Auby, Isabelle; Oger-jeanneret, Helene; Sauriau, Pierre-guy; Hily, Christian; Barille, Laurent.
Tipo: Text
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00032/14358/11646.pdf
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Assessing phytoplankton realized niches using a French National Phytoplankton Monitoring Network ArchiMer
Farinas, Tania Hernandez; 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: http://archimer.ifremer.fr/doc/00255/36627/35263.pdf
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Bilan énergétique de l'huître japonaise Crassostrea gigas en conditions expérimentales de laboratoire au cours du mois de septembre 1991 ArchiMer
Soletchnik, Patrick; Bougrier, Serge; Razet, Daniel; Geairon, Philippe; Prou, Jean; Heral, Maurice; Barille, Laurent.
L'étude ci dessous, réalisée chez Crassostrea gigas, a comme objectif de comparer l'effet de différents types d'aliments sur le bilan énergétique de cette espèce.
Tipo: Text Palavras-chave: Huître creuse; Crassostrea gigas; Bilan énergétique; Sources alimentaires; Biodépots; Tri pré-ingestif.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/00100/21095/18720.pdf
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Cold storage of Pacific oysters out of water: biometry, intervalval water and sensory assessment ArchiMer
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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Contribution of benthic microalgae to the temporal variation in phytoplankton assemblages in a macrotidal system ArchiMer
Hernandez Farinas, Tania; Ribeiro, Lourenco; Soudant, Dominique; Belin, Catherine; Bacher, Cedric; Lampert, Luis; Barille, Laurent.
Suspended marine benthic microalgae in the water column reflect the close relationship between the benthic and pelagic components of coastal ecosystems. In this study, a 12-year phytoplankton time-series was used to investigate the contribution of benthic microalgae to the pelagic system at a site along the French-Atlantic coast. Furthermore, all taxa identified were allocated into different growth forms in order to study their seasonal patterns. The highest contribution of benthic microalgae was observed during the winter period, reaching up to 60% of the carbon biomass in the water column. The haptobenthic growth form showed the highest contribution in terms of biomass, dominant in the fall-winter period when the turbidity and the river flow were high....
Tipo: Text Palavras-chave: Co-inertia; Dynamic linear models; Epipelon; Epiphyton; Haptobenthos; Microphytobenthos growth forms; Seasonality; Tychoplankton.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00392/50345/51035.pdf
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COSELMAR. Compréhension des socio-écosystèmes littoraux et marins pour la prévention et la gestion des risques. Bilan scientifique 2013-2017 ArchiMer
Pardo, Sophie; Hess, Philipp; Simon, Elodie; Barille, Laurent; Geslin, Emmanuelle; Cognie, Bruno; Martin-jezequel, Véronique; Sechet, Véronique; Herrenknecht, Christine; Baron, Regis; Bourseau, Patrick; Amzil, Zouher; Masse, Anthony; Vandanjon, Laurent; Dumay, Justine; Lebeau, Thierry; Turpin, Vincent; Mondeguer, Florence; Petitgas, Pierre; Trouillet, Brice; Mercier, Denis; Guillotreau, Patrice; Guineberteau, Thierry; Mahevas, Stephanie; Schoefs, Franck; Sophie Pardo; Philipp Hess; Pauline Borgniet; Laurent Barillé; Emmanuelle Geslin; Bruno Cognie; Véronique Martin-Jezequel; Véronique Sechet; Christine Herrenknecht; Régis Baron; Patrick Bourseau; Zouher Amzil; Anthony Massé; Laurent Vandanjon; Justine Dumay; Thierry Lebeau; Vincent Turpin; Florence Mondeguer; Pierre Petitgas; Brice Trouillet.
COSELMAR, a 4-year project financed by the Région des Pays de la Loire at 2.1 M€, officially started on the 7th January 2013. The project is coordinated by Philipp Hess (IFREMER) and Sophie Pardo (Université de Nantes-LEMNA) and falls under the Federation for Research Institut Universitaire Mer et Littoral (IUML, FR CNRS 3473)*. COSELMAR has also been approved by the Scientific Council of the MSH Ange Guépin. COSELMAR is a research project uniting 5 research units of IFREMER and 11 laboratories of the Université de Nantes, along with academic partners, and national and international industries. The aim is to achieve a better understanding of the marine and coastal ecosystems and the associated resources. The project will also provide insights into risk...
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Ano: 2017 URL: https://archimer.ifremer.fr/doc/00406/51793/52550.pdf
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Diagnostic étendu de l'eutrophisation (DIETE). Rôle des sédiments dans le cycle des nutriments et impacts sur l'eutrophisation de la baie de Vilaine (2014-2017) ArchiMer
Souchu, Philippe; Cochennec-laureau, Nathalie; Ratmaya, Widya; Retho, Michael; Andrieux, Francoise; Le Merrer, Yoann; Barille, Laurent; Barille, Anne-laure; Goubert, Evelyne; Plus, Martin; Laverman, Anniet.
Le projet DIETE a exploré les données hydrobiologiques (paramètres physico-chimiques, nutriments, phytoplancton) acquises depuis les années 80 dans les eaux côtières au large de la Loire et de la Vilaine, parallèlement à celles des deux fleuves. L’augmentation des concentrations de nitrates dans les eaux de la Loire, appuyée par les réserves sédimentaires de phosphates et de silicate ont entraîné de profonds bouleversements dans la dynamique du phytoplancton de la baie de Vilaine ces deux dernières décennies avec 1) une augmentation substantielle de la biomasse, 2) une modification importante de l’évolution saisonnière, 3) un changement dans les proportions entre diatomées et dinoflagellés au profit des diatomées. Ces résultats ouvrent tout un champ...
Tipo: Text Palavras-chave: Eutophisation; Azote; Phosphore; Silicium; Sédiments; Modélisation.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00425/53695/54593.pdf
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Does bivalve mucus favour the growth of their main food source, microalgae? ArchiMer
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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Ecophysiological deterministic model for Crassostrea gigas in an estuarine environment ArchiMer
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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Etude expérimentale de la rétention et du tri particulaire chez Crassostrea gigas : utilisation de régimes alimentaires monospécifiques composés d'Haslea ostrearia ArchiMer
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...
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Ano: 1990 URL: http://archimer.ifremer.fr/doc/00441/55211/56681.pdf
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Evaluation de l’état écologique des masses d’eau de transition dans le cadre de la DCE. Etude de la pertinence du suivi des peuplements du microphytobenthos estuarien ArchiMer
Ribeiro, Lourenço; Le Bris, Anthony; Hernandez Farinas, Tania; Buchet, Remi; Dutertre, Mickaël; Metzger, Edouard; Rosa, Philippe; Gernez, Pierre; Lerouxel, Astrid; Barille, Laurent.
In order to establish the ecological status of water bodies, the European Water Framework Directive (WFD) is based on the evaluation of a number of biological quality elements, as well as physical parameters supporting the biology. In estuaries, phytoplankton monitoring was not considered relevant because of the high turbidity characterizing the large metropolitan estuaries and the French overseas departments (Guyana). In this work, we considered the possibility of using microphytobenthos (MPB) as a biological indicator of the ecological status of estuaries. This activity report summarizes the actions undertaken in 2017 under an AFB / Université de Nantes convention, which is structured around two main axes: the first axis is based on the analysis of the...
Tipo: Text Palavras-chave: DCE; Diatomées benthiques; Diversité; Estuaires; Facteurs naturels; Gradient de perturbation; Loire; Bio-indication; Microphytobenthos; Pressions anthropiques; Télédétection.; Anthropogenic pressures; Benthic diatoms; Bio-indication; Diversity; Estuary; Loire; Microphytobenthos; Natural factors; Perturbation gradient; Remote sensing; WFD.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00446/55725/57376.pdf
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Evolution saisonnière de la filtration de bivalves intertidaux dans des conditions naturelles ArchiMer
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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Feeding of Crassostrea gigas at high seston load : modeling requirements ArchiMer
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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Feeding response of the polychaete Sabellaria alveolata (Sabellariidae) to changes in seston concentration ArchiMer
Dubois, Stanislas; Barille, Laurent; Cognie, Bruno.
Sabellaria alveolata is a tube-building gregarious polychaete that constructs large biogenic reefs. In macrotidal shellfish ecosystems, this species competes for food with cultivated suspension-feeders. The suspension-feeding activity and clearance rate of S. alveolata were investigated in response to changes in seston concentration. A flow-through system was designed to study 225 cm(2) reef blocks with more than 500 individuals. The experimental conditions were characterized by increasing concentrations of suspended particulate matter ranging from 6.5 to 153.8 mg L-1, while the organic content of the diet (microalgae Skeletonema costatum) decreased inversely from 49 to 9%, to mimic the dilution of organic matter by inorganic particles, characteristic of...
Tipo: Text Palavras-chave: Bay of Mont Saint Michel; Tubiculous polychaete; Trophic capacity; Suspension feeders; Reefs; Feeding activity.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6778.pdf
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Global change and climate-driven invasion of the Pacific oyster (Crassostrea gigas) along European coasts: a bioenergetics modelling approach ArchiMer
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: http://archimer.ifremer.fr/doc/00287/39828/38459.pdf
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Growth of the Pacific oyster (Crassostrea gigas) in a high-turbidity environment: Comparison of model simulations based on scope for growth and dynamic energy budgets ArchiMer
Barille, Laurent; Lerouxel, Astrid; Dutertre, Mickael; Haure, Joel; Barille, Anne-laure; Pouvreau, Stephane; Alunno-bruscia, Marianne.
We compared growth simulations by dynamic energy budget (DEB) and scope for growth (SFG) models of the Pacific oyster Crassostrea gigas, cultivated in Bourgneuf Bay on the French Atlantic coast. This bay is located at a latitude in the middle of the European range of the species, and is characterized by high concentrations of suspended particulate matter (SPM) and a marked gradient between high-turbidity sites in the north (daily SPM > 500 mg L-1) and intermediate-turbidity sites in the south. The models use two forcing variables: seawater temperature and food density. We tested two indices of food availability: chlorophyll a and microalgal concentrations. In the SFG model, food intake is simulated by a type-II Holling functional response, as in the DEB...
Tipo: Text Palavras-chave: Oyster; Dynamic Energy Budget model; Scope for growth model; Turbidity.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00043/15433/12783.pdf
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Gut passage times in two bivalve molluscs fed toxic microalgae: Alexandrium minutum, A-catenella and Pseudo-nitzschia calliantha ArchiMer
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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Influence de la charge particulaire sur la filtration d'une population d'huître Crassostrea gigas dans le bassin estuarien de Marennes-Oléron (France) : analyse de deux cycle de marée ArchiMer
Soletchnik, Patrick; Prou, Jean; Heral, Maurice; Barille, Laurent; Razet, Daniel; Guezennec, Loïc.
Filtration of oyster population (100 animals) have been followed during 16 days in raceway systems with continuous recorder of the input and output of the raceway for in situ turbidity and fluorescence. Experimental conditions were fluctuated with particulate matter which varied during a tidal cycle from 40 mg.l-1to 300 mg.l-1. During the same period the phytoplanktonic biomass presented synchronous variations form 7 to 20 µg.l-1 bound with sediment resuspension of phytobenthos and oyster biodeposit created by alternating currents. Filtration of oyster population during a neap tide cycle, variated between 1.2 and 2.8I.h-1 by animal for a calculated retention based on turbidity and between 2.4 and 4.8 l.h-1 by animal for a retention calculated with...
Tipo: Text Palavras-chave: Marée; Charge particulaire; Marennes Oléron; Physiologie; Filtration; Crassostrea gigas; Huîtres.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/1991/acte-3059.pdf
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Influence du cycle semi-dirune et vives-eaux mortes-eaux sur la disponibilité du matériel particulaire et son utilisation par une population de Mytilus edulis ArchiMer
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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