Consulta: creatorFacets:"Gangnery, Aline"
Registros recuperados: 29
Data/hora: 19/05/2024 16:22:47

A single bio-energetics growth and reproduction model for the oyster Crassostrea gigas in six Atlantic ecosystems
Provedor de dados: 5
Autores: Alunno-bruscia, Marianne; Bourles, Yves; Maurer, Daniele; Robert, Stephane; Mazurie, Joseph; Gangnery, Aline; Goulletquer, Philippe; Pouvreau, Stephane.
Many studies based on bioenergetics growth models have investigated the effects of environmental factors on oyster (Crassostrea gigas) growth and physiology. However, most of these models are site-specific and cannot be applied to other culture sites without the re-estimation of parameters or re-formulation of some processes. We aimed to develop a generic growth model suitable for application in contrasting environments, with a constant set of parameters. We tested the oyster-DEB model (Bourlès et al. 2009) for the stimulation of C. gigas growth in different cohorts (spats and adults) at major shellfish culture sites in France, in several years: Arcachon (1993–1994); Marennes-Oléron (2007); Quiberon (1999, 2000, 2001); Rade de Brest (2008); Baie du...
Tipo: Text
Palavras-chave: DEB theory; Modelling; Bivalves; Crassostrea gigas; Phytoplankton; Temperature effect; Coastal environment.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00043/15403/12762.pdf

A three-dimensional ecological model to optimize shellfish culture in the baie des Veys (Normandy, France)
Provedor de dados: 5
Autores: Roudesli, Sonia; Cugier, Philippe; Le Gendre, Romain; Gangnery, Aline.
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00055/16636/14333.pdf

Application of a dynamic energy budget model to the Pacific oyster, Crassostrea gigas, reared under various environmental conditions
Provedor de dados: 5
Autores: Pouvreau, Stephane; Bourles, Yves; Lefebvre, Sebastien; Gangnery, Aline; Alunno-bruscia, Marianne.
The Dynamic Energy Budget (DEB) model (Kooijman, S.A.L.M., 1986. Energy budgets can explain body size relations. J. Theor. Biol. 121, 269¿282; Kooijman, S.A.L.M., 2000. Dynamic Energy and Mass Budgets in Biological Systems. Cambridge University Press, Cambridge, 424 pp.) has been adapted to describe the dynamics of growth and reproduction of the Pacific oyster (Crassostrea gigas) reared in different areas under conditions ranging from controlled to natural. The values of the model parameters were estimated from available physiological data and from published information. The sets of data used to validate the model came from three long-term growth experiments (&gt; 5 months) performed on Pacific oysters reared under different conditions of food and...
Tipo: Text
Palavras-chave: Reproductive effort; Reproduction; Growth; Ecophysiology; Dynamic energy budget; Crassostrea gigas.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1817.pdf

Avis sur la proposition de modification du Schéma des Structures pour le département du Calvados
Provedor de dados: 5
Autores: Gangnery, Aline; Normand, Julien.
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00350/46130/79375.pdf

Avis sur projet de modification de l’annexe 1 du Schéma des Structures du Pas-de-Calais
Provedor de dados: 5
Autores: Gangnery, Aline.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00658/77038/78337.pdf

Avis sur un projet d'expérimentation d'élevage d'huîtres sur des structures mytilicoles à Oye Plage dans le département du Pas de Calais
Provedor de dados: 5
Autores: Gangnery, Aline; Garcia, Celine; Loots, Christophe.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00500/61150/64580.pdf

Bilan 2015 du dispositif national de surveillance de la santé des mollusques marins
Provedor de dados: 5
Autores: Lupo, Coralie; Osta Amigo, Axel; Fleury, Elodie; Robert, Stephane; Garcia, Celine; Arzul, Isabelle; Baillon, Laury; Bechemin, Christian; Canier, Lydie; Chollet, Bruno; Dechamps, Lucie; Dubreuil, Christine; Faury, Nicole; Francois, Cyrille; Godfrin, Yoann; Lapegue, Sylvie; Morga, Benjamin; Travers, Marie-agnes; Tourbiez, Delphine; Masson, Jean-claude; Verin, Francoise; Cordier, Remy; Gangnery, Aline; Louis, Wilfried; Mary, Charlotte; Normand, Julien; Penot, Julia; Cheve, Julien; Dagault, Francoise; Le Jolivet, Aurore; Le Gal, Dominique; Lebrun, Luc; Bellec, Gwenael; Bouget, Jean-francois; Cochennec-laureau, Nathalie; Palvadeau, Hubert; Grizon, James; Chabirand, Jean-michel; Pepin, Jean-francois; Seugnet, Jean-luc; D'Amico, Florence; Maurer, Daniele; Le Gall, Patrik; Mortreux, Serge; Baldi, Yoann; Orsoni, Valerie; Bouchoucha, Marc; Le Roy, Valerian; Pouvreau, Stephane; Queau, Isabelle; Lamoureux, Alice.
Depuis 1992, la surveillance de la santé des mollusques marins du littoral français est assurée par le réseau de Pathologie des Mollusques (Repamo). Ses activités s’inscrivent dans le cadre de la Directive Européenne 2006/88/CE. Depuis son évaluation par la plateforme nationale d’épidémiosurveillance en santé animale en 2012, l’objectif de surveillance est la détection précoce des infections dues à des organismes pathogènes exotiques et émergents affectant les mollusques marins sauvages et d’élevage. L’année 2015 est la première année de transition pour laquelle un début d’évolution des modalités de surveillance de la santé des mollusques marins animées par l’Ifremer a été amorcé. Un dispositif hybride de surveillance a été mis en place, s’appuyant sur...
Tipo: Text
Palavras-chave: Réseau; Surveillance; Pathologie; Mollusques; Coquillages; Santé; Mortalité; Maladie.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00324/43486/42945.pdf

Budget énergétique de l'huître perlière, Pinctada margaritifera, dans le lagon de Takapoto
Provedor de dados: 5
Autores: Pouvreau, Stéphane; Tiapari, Jérôme; Gangnery, Aline; Garnier, M.; Lagarde, Franck; Robert, Stéphane; Jonquieres, Gerard; Teissier, Hinano; Prou, Jean; Bennett, Auguste; Caisey, Xavier; Haumani, Gaby; Buestel, Dominique; Bodoy, Alain.
Tipo: Text
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00041/15176/12513.pdf

Connectivities with shellfish farms and channel rivers are associated with mortality risk in oysters
Provedor de dados: 5
Autores: Gangnery, Aline; Normand, Julien; Duval, Cyrielle; Cugier, Philippe; Grangeré, Karine; Petton, Bruno; Petton, Sebastien; Orvain, Francis; Pernet, Fabrice.
Oyster diseases have major consequences on fisheries and aquaculture. In France, young Pacific oysters Crassostrea gigas are severely hit by the ostreid herpesvirus, whereas adults suffer mortalities presumably caused by pathogenic bacteria. Here we investigated the origin and spread of mortalities that affect both young and adult oysters, and we identified and compared their risk factors. Mortality was monitored in 2 age classes of oysters deployed in early spring at 39 sites spread over a 37 km2 surface area inside and outside of shellfish farms. Environmental data obtained from numerical modelling were used to investigate risk factors. Mortality of young oysters associated with ostreid herpesvirus occurred in the oyster farming area. Hydrodynamic...
Tipo: Text
Palavras-chave: Aquaculture; Bivalve; Disease; Epidemiology and health; Ecological modelling; Hydrodynamic connectivity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00588/69983/67896.pdf

Estimation des stocks de bivalves en élevage et des épibiontes dans la lagune de Thau et modélisation de la dynamique des populations d'huîtres creuses (Crassostrea gigas, Thunberg)
Provedor de dados: 5
Autores: Gangnery, Aline.
In Thau Iagoon (Mediterranean Sea), shellfish are cultured in suspension. Molluscs are reared on ropes that are suspended on frames. Principal species concerned by breeding are Crassostrea gigas, Mytilus galloprovincialis and, in a less extent, Ostrea edulis. A new sampling method was developped to assess the total stock of cultured shellfish and was tested in July 1998 and April 1999. The total stock was found to be 19500 tons (± 1120 SE) in 1998 and 14100 tons (± 830 SE) in 1999, thus exhibiting temporal variations. Temporal differences in the total stock are mainly attributable to the breeding cycle but also to sorne exceptionnal events which occurred in Thau lageon in 1997 and 1998 (water anoxia, bacteriological crisis, bloom of toxic algae). In the...
Tipo: Text
Palavras-chave: Etang de Thau; Bivalves; Echantillonnage; Dynamique; Modèle; Epibiontes.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00443/55478/57008.pdf

Etude et modélisation de la dynamique des populations de bivalves en élevage (Crassostrea gigas et Mytilus galloprovincialis) dans le bassin de Thau (Méditerranée, France) et des ascidies solitaires associées
Provedor de dados: 5
Autores: Gangnery, Aline.
The total standing stock of bivalves cultured in Thau Lagoon (France) that is mainly constituted of the Pacific oyster, Crassostrea gigas, and the Mediterranean mussel, Mytilus galloprovincialis, vary between 14,000 and 20,000 tons within a year. These variations were attributed to the rearing cycle of molluscs in the lagoon but also to their growth performances. Oysters cultured in the Thau Lagoon presented the best growth rate ever reported whereas trophic conditions are low : mean concentrations in organic particulate matter and total chlorophyll a averaged 1 mg.l-1 and 1.2 µg.l-1, respectively. The development of a growth model shows that temporal pattern (i.e. seasonality) of bivalve growth is explained by water temperature and spatial pattern is...
Tipo: Text
Palavras-chave: Lagoon ecosystem; Resource management; Rearing strategies; Production; Standing stock; Hydrobiology; Growth; Shellfish culture; Ascidiella aspersa; Mussel; Oyster; Ecosystème lagunaire; Gestion des ressources; Stratégies d'élevage; Production; Stock; Hydrobiologie; Croissance; Conchyliculture; Ascidiella aspersa; Moule; Huître.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/these-102.pdf

Etude expérimentale de l'influence de deux stress environnementaux sur les défenses immunitaires et la résistance à la vibriose de la crevette Penaeus stylirostris
Provedor de dados: 5
Autores: Gangnery, Aline.
Cette étude a pour objectif de mesurer chez la crevette Penaeus stylirostris l'effet de deux stress environnementaux, ammoniaque et hypoxie, sur les défenses immunitaires (hémocytes et prophénoloxydase) et la résistance à l' infection par la bactérie Vibrio penaeicidae. Les crevettes, sélectionnées en stade C du cycle de mue, ont été soumises pendant 24 heures à plus ieurs doses d'ammoniaque N.NH3 ( 1, 1 .5, 2, 2.5 et 3 mg/l) ou placées en situation d' hypoxie (1 ppm vs 6ppm en normoxie). L'effet du stress a été évalué à 24 h par la mesure de la capacité osmorégulatrice ainsi que les paramètres immunitaires. Les résultats montrent que l'ammoni aque à 3 mg N.NH3/I induit une diminution significative du nombre total des hémocytes, cependant que l'activité de...
Tipo: Text
Palavras-chave: Penaeus stylirostris; Vibrio penaeicidae; Immunité; Hémocyte; Prophénoloxydase; Infection bactérienne; Capacité osmorégulatrice; Ammoniaque; Hypoxie.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00441/55273/56767.pdf

Etude in situ et expérimentale de l'effort de reproduction chez l'huître perlière Pinctada margaritifera
Provedor de dados: 5
Autores: Gangnery, Aline.
The aim of this work is to study reproductive effort of the pearl oyster Pinctada margaritifera. In order to reach this objective, two experiences were planned. First, we decidcd to follow in situ growth and reproduction of pearl oysters of three age groups : l, 2 and 3 years old. This projcct began at the end of march 1997 and is planned for one year. The results presented in this study stopped at the end of july 1997. This experience is based on the bimonthly sampling of 120 pearl oysters (40 from every age group) from the lagoon of Takapoto (Tuamotu, French Polynesia). ln a second part, an experience was lead in laboratory, on the same animals. The objective was to trigger artificially spawns and to harvest genital products to estimate values of...
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00424/53547/54409.pdf

Evaluation des stocks mytilicoles de Basse-Normandie en 2006
Provedor de dados: 5
Autores: Nogues, Loic; Gangnery, Aline.
Since 1989, the standing stock of bivalves cultivated in Normandy was estimated every 5 years by Ifremer. Within the frame of the OGIVE project, a new study was conducted in 2006 to evaluate the mussel standing stock. Classical sampling methods (stratified, two-stage and simple random sampling) were used and adapted to each culture area. The total standing stock in Normandy was evaluated to 23 550 tons with a precision of 10.94 %. The west coast of Cotentin remained the main production area in Normandy with approximately 22 000 tons of mussels, whereas the east coast and the baie des Veys only represented a small part of the total stock (respectively 6% and 1%). The collected data were also used to map the spatial distribution of mussel biomasses. This map...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00254/36489/35031.pdf

Gametogenic cycle and reproductive effort of the tropical blacklip pearl oyster, Pinctada margaritifera (Bivalvia : Pteriidae), cultivated in Takapoto atoll (French Polynesia)
Provedor de dados: 5
Autores: Pouvreau, Stephane; Gangnery, Aline; Tiapari, Jerome; Lagarde, Franck; Garnier, Matthieu; Bodoy, Alain.
The gametogenic cycle and the reproductive effort of the blacklip pearl oyster, Pinctada margaritifera, cultivated in Takapoto lagoon were studied for a 1-year period (March 1997-April 1998) by bimonthly observations of gonadal sections, dry tissue weights and gonadal index in a population of pearl oyster composed of three age-groups. pearl oysters attained sexual maturity in the end of their first year (height approximate to 40 mm), implying that P. margaritifera is a late-maturing species in comparison with other Pteriidae. This species was also confirmed to be a marked protandrous successive hermaphrodite in culture, with 100 % of males at first maturity and 75 % in older pearl oyster (height &gt; 120 mm). The general pattern of gametogenic activity,...
Tipo: Text
Palavras-chave: French Polynesia; Reproductive effort; Reproductive cycle; Tropical aquaculture; Gametogenesis; Blacklip pearl oyster; Polynésie française; Effort de reproduction; Cycle de reproduction; Aquaculture tropicale; Gamétogenèse; Huître perlière.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-1391.pdf

Growth of the black-lip pearl oyster, Pinctada margaritifera, in suspended culture under hydrobiological conditions of Takapoto lagoon (French Polynesia)
Provedor de dados: 5
Autores: Pouvreau, Stephane; Tiapari, Jerome; Gangnery, Aline; Lagarde, Franck; Garnier, Matthieu; Teissier, Hinano; Haumani, G; Buestel, Dominique; Bodoy, Alain.
Growth of the black-lip pearl oyster, Pinctada margaritifera var. cumingi, was studied for an annual cycle, from March 1997 to April 1998, in the lagoon of Takapoto atoll (Tuamotu archipelago, French Polynesia). Growth in shell and in tissue were measured every 15 days on three successive age groups of cultivated pearl oysters. At the same time, hydrobiological parameters (temperature, salinity, oxygen concentration, suspended particulate matter), known to have influence on bivalve growth, were followed each week during culture. No seasonal trend was observed in hydrobiological parameters, except for temperature which varied between 26 degrees C and 31 degrees C. The potential food for pearl oysters (particulate organic matter, POM, mg l(-1)) was slightly...
Tipo: Text
Palavras-chave: Pearl culture; Matter in suspension; Biochemical composition; Length weight relations ship; Tropical lagoon; Growth; Pinctada margaritifera.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-381.pdf

Individual mussel growth model using DEB (Dynamic Energy Budget) theory: revisiting the DEB parameter values for Mytilus edulis
Provedor de dados: 5
Autores: Flye Sainte Marie, Jonathan; Alunno-bruscia, Marianne; Gangnery, Aline; Rannou, Eric; Rosland, Rune; Strand, Øivind.
Mussel aquaculture is well developed in various ecosystems of temperate waters. In the aim of developing predictive tools for management of mussel aquaculture, a better understanding of relationships between the environmental conditions and mussel growth is necessary. For this purpose, development of bioenergetic models, linking environmental variables (especially food resource and temperature) and mussel growth and reproduction, are of a particular interest. Dynamic Energy Budget (DEB) theory offers a general framework to study energy flows in organisms, from assimilation to use for maintenance, growth and reproduction. This theory is appropriate for growth modelling of marine organisms and have first been applied in 1993 to model mussel growth....
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00032/14368/11658.pdf

Modelling Crassostrea gigas growth and reproduction in different contrasted ecosystems by using dynamic energy budgets : generic validation of the oyster-DEB model
Provedor de dados: 5
Autores: Bourles, Yves; Maurer, Daniele; Le Moine, Olivier; Geairon, Philippe; Mazurie, Joseph; Gangnery, Aline; Alunno-bruscia, Marianne; Pouvreau, Stephane; Goulletquer, Philippe.
Oyster farming is the main aquaculture activity in France, where Pacific oyster (Crassostrea gigas) is spatially cultured from the English Channel to the Mediterranean coasts. Oyster growth performance monitored along French coasts are widely heterogeneous among culture sites and over years. Many studies have been carried out to understand the effects of environmental factors on oyster growth and physiology, by using bioenergetics growth models. However, most of these studies were site-specific. As an example, the model developed by Barillé et al. (1997), which was extensively specified with more than 50 parameters, was validated in the Marennes-Oléron Bay, but cannot be successfully applied to other culture sites without re-estimating parameters or...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00032/14367/11657.pdf

Observatoire national du cycle de vie de l’huître creuse en France. Rapport annuel ECOSCOPA 2018
Provedor de dados: 5
Autores: Fleury, Elodie; Petton, Sebastien; Corporeau, Charlotte; Gangnery, Aline; Pouvreau, Stephane.
Occupying a prime position in the French coastal landscape, oyster farming is the leading contributor to the French aquaculture sector with an estimated production of 85,000 tonnes in recent years. However, since 2008, this species has been affected by recurrent massive mortality episodes triggered by the presence of viral infectious agents (of the type Herpes virus OsHV-1 μVar) in conjunction with environmental factors (i.e. temperature rise). This viral infection induces an alteration of the antimicrobial defenses and a destabilization of its microbiota. This process leads to secondary infection by opportunistic bacteria that are potentially pathogenic and multiply rapidly, causing irreversible tissue damage leading to the death of the animal. At the...
Tipo: Text
Palavras-chave: Huître creuse; Physiologie; Génétique; Écologie; Réseau National.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00634/74654/74826.pdf

Projet OGIVE. Outils d'aide à la Gestion et à la Valorisation des Ecosystèmes conchylicoles de Basse-Normandie. Rapport final de phase III (2011-2013)
Provedor de dados: 5
Autores: Gangnery, Aline; Cugier, Philippe; Le Gendre, Romain; Legendre, Aurelie; Maheux, Frank; Mary, Charlotte; Normand, Julien; Parrad, Sophie; Pierre-duplessix, Olivier; Picoche, Coralie; Pien, Sebastien; Rabiller, Emilie; Simon, Benjamin.
L’objectif général du projet OGIVE est d’acquérir des connaissances sur le fonctionnement des écosystèmes conchylicoles de Basse-Normandie dans le but d’établir une plateforme de données communes à l’ensemble des partenaires du projet. Ces connaissances sont ensuite utilisées pour développer des outils permettant de fournir des avis et expertises aux gestionnaires du Domaine Public Maritime. Le projet a ainsi pour objectif de contribuer au développement durable de la filière conchylicole en Basse-Normandie en optimisant la production conchylicole et en préservant la qualité environnementale des écosystèmes qui supportent cette activité. Le projet OGIVE a été structuré initialement autour de trois actions : 1) Acquisition de données : cette action a le...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00253/36468/35010.pdf

Projet OGIVE. Outils d’aide à la Gestion Intégrée et à la Valorisation des Ecosystèmes conchylicoles de Basse-Normandie. Rapport final d’activités - Phase I (2005-2008)
Provedor de dados: 5
Autores: Gangnery, Aline.
L’objectif général du projet OGIVE est d’acquérir des connaissances sur le fonctionnement des écosystèmes conchylicoles de Basse-Normandie dans le but d’établir une plateforme de données communes à l’ensemble des partenaires du projet. Ces connaissances sont ensuite utilisées pour développer des outils novateurs permettant de fournir des avis et expertises aux gestionnaires du Domaine Public Maritime. Le projet a ainsi pour objectif de contribuer au développement durable de la filière conchylicole en Basse-Normandie en optimisant la production conchylicole et en préservant la qualité environnementale des écosystèmes qui supportent cette activité. Le projet OGIVE a été structuré initialement autour du développement de trois outils : 1) Un outil empirique...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00254/36488/35030.pdf

Qualité des huîtres creuses Crassostrea gigas élevées dans le bassin de Thau et influence de la densité d'élevage sur la qualité. Recommandations pour l'élaboration d'un schéma des structures des élevages de mollusques du bassin de Thau. Rapport final
Provedor de dados: 5
Autores: Buestel, Dominique; Alunno Bruscia, Marianne; Chabirand, Jean-michel; Vercelli, Catherine; Oheix, Jocelyne; Pichot, Yves; Gangnery, Aline.
La densité d'élevage des mollusques est un des facteurs importants qui conditionnent la qualité de la production. Dans le bassin de Thau, une réflexion est actuellement en cours pour mettre en place un schéma des structures encadrant les pratiques conchylicoles de manière à améliorer et régulariser la qualité des huîtres. L'objectif de ce travail est de proposer, sur la base de données les plus objectives possibles, des recommandations en terme de densité d'élevage qui permettraient d'éviter une surcharge aussi bien locale que globale sur le bassin. Une première étude a consisté à réaliser une expérience, à l'échelle d'une table d'élevage, pour tester l'influence de la densité de population sur la croissance et la qualité de l'huître creuse (Crassostrea...
Tipo: Text
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00039/15031/12366.pdf

Réseau Hydrologique Littoral Normand - RHLN - Année 2012
Provedor de dados: 5
Autores: Baehr, Antoine; Menet-nedelec, Florence; Riou, Philippe; Etourneau, Claude; Fontaine, Bruno; Francoise, Sylvaine; Gangnery, Aline; Jacqueline, Franck; Lamort, Laure; Lesaulnier, Nadine; Maheux, Frank; Picoche, Coralie; Pierre-duplessix, Olivier; Rabiller, Emilie; Schapira, Mathilde; Simon, Benjamin.
Le Réseau Hydrologique Littoral Normand (RHLN) a été approuvé en 2007 par ses partenaires, avec le triple objectif (1) de maintenir le suivi de la qualité des masses d’eau et d’évaluer leur niveau d’eutrophisation en réponse aux réglementations (Directive Nitrate, OSPAR, DCE), (2) de poursuivre la réflexion sur la définition des indicateurs DCE, puis (3) de développer les connaissances et de fournir des données à la modélisation. Ce rapport réalise la synthèse des résultats obtenus en 2012, onzième année depuis le début du suivi en Normandie. Le climat de cette année 2012 a été caractérisé par des températures saisonnières proches des normales malgré des écarts de température parfois importants d’un mois sur l’autre (notamment en hiver). Par rapport aux...
Tipo: Text
Palavras-chave: Abondance; Baie de Seine; Biomasse chlorophyllienne; Bloom; DCE; Écosystème côtier; Éléments de qualité; Eutrophisation; Grille d’évaluation de l’eutrophisation; Hydrologie; Limitation potentielle; Normandie; Nutriments; Phytoplancton; Production primaire; Réseau hydrologique; RHLN; Stocks hivernaux.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00211/32224/30672.pdf

Spatial and temporal interaction between sediment and microphytobenthos in a temperate estuarine macro-intertidal bay
Provedor de dados: 5
Autores: Orvain, Francis; Lefebvre, Sebastien; Montepini, J.; Sebire, M.; Gangnery, Aline; Sylvand, B.
Intertidal flats of the estuarine macro-intertidal Baie des Veys (France) were investigated to identify spatial features of sediment and microphytobenthos (MPB) in April 2003. Gradients occurred within the domain, and patches were identified close to vegetated areas or within the oyster-farming areas where calm physical conditions and biodeposition altered the sediment and MPB landscapes. Spatial patterns of chl a content were explained primarily by the influence of sediment features, while bed elevation and compaction brought only minor insights into MPB distribution regulation. The smaller size of MPB patches compared to silt patches revealed the interplay between physical structure defining the sediment landscape, the biotic patches that they contain,...
Tipo: Text
Palavras-chave: Benthic diatoms; Benthos; Coastal ecosystems; Intertidal flats; Baie des Veys; Normandie; Spatial pattern; Geostatistics; Kriging.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00088/19945/17598.pdf

Spatial, Ecological and Social Dimensions of Assessments for Bivalve Farming Management
Provedor de dados: 5
Autores: Bacher, Cedric; Gangnery, Aline; Cugier, Philippe; Mongruel, Remi; Strand, Oivind; Frangoudes, Katia.
The general purpose of assessment is to provide decision-makers with the best valuable data, information, and predictions with which management decisions will be supported. Using case studies taken from four scientific projects and dealing with the management of marine bivalve resources, lessons learned allowed identifying some issues regarding assessment approaches. The selected projects also introduced methodological or institutional frameworks: ecosystem approach to aquaculture (EAA), system approach framework (SAF), marine spatial planning (MSP), and valuation of ecosystem services (ES). The study on ecosystem services linked ES to marine habitats and identified ES availability and vulnerability to pressures. The results were displayed as maps of...
Tipo: Text
Palavras-chave: Ecosystem services; Marine spatial planning; Ecosystem approach to aquaculture; System approach; Modeling; Stakeholder involvement.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00470/58138/60608.pdf

Spatial Variability of Benthic-Pelagic Coupling in an Estuary Ecosystem: Consequences for Microphytobenthos Resuspension Phenomenon
Provedor de dados: 5
Autores: Ubertini, Martin; Lefebvre, Sebastien; Gangnery, Aline; Grangere, Karine; Le Gendre, Romain; Orvain, Francis.
The high degree of physical factors in intertidal estuarine ecosystem increases material processing between benthic and pelagic compartments. In these ecosystems, microphytobenthos resuspension is a major phenomenon since its contribution to higher trophic levels can be highly significant. Understanding the sediment and associated microphytobenthos resuspension and its fate in the water column is indispensable for measuring the food available to benthic and pelagic food webs. To identify and hierarchize the physical/biological factors potentially involved in MPB resuspension, the entire intertidal area and surrounding water column of an estuarine ecosystem, the Bay des Veys, was sampled during ebb tide. A wide range of physical parameters (hydrodynamic...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00090/20126/17775.pdf

Towards the Determination of Mytilus edulis Food Preferences Using the Dynamic Energy Budget (DEB) Theory
Provedor de dados: 5
Autores: Picoche, Coralie; Le Gendre, Romain; Flye-sainte-marie, Jonathan; Francoise, Sylvaine; Maheux, Frank; Simon, Benjamin; Gangnery, Aline.
The blue mussel, Mytilus edulis, is a commercially important species, with production based on both fisheries and aquaculture. Dynamic Energy Budget (DEB) models have been extensively applied to study its energetics but such applications require a deep understanding of its nutrition, from filtration to assimilation. Being filter feeders, mussels show multiple responses to temporal fluctuations in their food and environment, raising questions that can be investigated by modeling. To provide a better insight into mussel–environment interactions, an experiment was conducted in one of the main French growing zones (Utah Beach, Normandy). Mussel growth was monitored monthly for 18 months, with a large number of environmental descriptors measured in parallel....
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00218/32895/31380.pdf

Une application dynamique sous système d'information géographique pour la planification spatiale des activités aquacoles en Normandie
Provedor de dados: 5
Autores: Gangnery, Aline; Le Gendre, Romain; Picoche, Coralie; Petton, Sebastien; Bacher, Cedric; Alunno-bruscia, Marianne; You, Junyong; Hageberg, Anne; Strand, Oivind.
La conchyliculture représente une activité importante en Normandie et doit faire face à de sérieuses difficultés (mortalités, diminution de la qualité des produits). Un enjeu actuel concerne la réorganisation des zones d’élevage existantes afin d’optimiser les performances. A contrario, la pisciculture marine est très peu présente dans cette région et il existe un réel enjeu de développement économique. Dans ce contexte, les décideurs (services de l’Etat) et les professionnels ont besoin d’identifier des sites propices à la réalisation de ces activités qui soient également compatibles avec les nombreux autres usages du littoral. Au sein du projet SISQUONOR, un démonstrateur sous Système d’Information Géographique, nommé AkvaVis et développé originellement...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00307/41773/40988.pdf

Use of dynamic energy budget and individual based models to simulate the dynamics of cultivated oyster populations
Provedor de dados: 5
Autores: Bacher, Cedric; Gangnery, Aline.
We successfully tested a Dynamic Energy Budget (DEB) model of the oyster Crassostrea gigas using published environmental data and growth data collected in Than lagoon (France). Estimates of most DEB parameters were based on independent datasets and only two parameters were calibrated using our datasets: the shape parameter, which was used to convert body volume into shell length, and the half-saturation coefficient, which controlled the functional response of assimilation to food concentration, represented by chlorophyll-a concentration. The DEB model proved to be robust and generic: it was able to reproduce oyster growth in Than lagoon and other ecosystems. We also assessed population dynamics by coupling DEB equations and an Individual Based Model (IBM)...
Tipo: Text
Palavras-chave: Thau Lagoon; Growth variability; Harvested production; Dynamic Energy Budget; Crassostrea gigas.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2329.pdf