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Infestation des coquilles d'huîtres Crassostrea gigas par les polydores en Basse-Normandie: recommandations et mise au point d'un traitement pour réduire cette nuisance. ArchiMer
Ruellet, Thierry.
Polydorid species form a complex of 157 Spionidae. Among them, Boccardia polybranchia, Boccardia semibranchita, Polydora ciliata and Polydora hoplura regularly colonize oysters cultivated in Normandy. Only one tenth of the populations survives more than one year. Recruits observed on the East coast of Cotentin come from the rocky calcareous flatness of Calvados. Their reproduction is spread out over all the year but winter recruitment is more prejudicial for oysters. Deepest area are more infested. Polydorids create mudblisters which cause a bad marketing of the oyster production. In order to reduce this harmful effect, it is possible to shift the setting of the oyster towards the end of March, to transfer oysters towards other areas during the peak of...
Tipo: Text Palavras-chave: Boccardia; Polydora; Parasites control; Polychaeta; Pests; Oysters; Boccardia; Polydora; Parasites (lutte contre les); Polychètes; Animaux et plantes nuisibles; Huîtres.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/these-162.pdf
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Multiscale patterns in the diversity and organization of benthic intertidal fauna among French Atlantic estuaries ArchiMer
Blanchet, Hugues; Gouillieux, Benoit; Alizier, Sandrine; Amouroux, Jean-michel; Bachelet, Guy; Barille, Anne-laure; Dauvin, Jean-claude; De Montaudouin, Xavier; Derolez, Valerie; Desroy, Nicolas; Grall, Jacques; Gremare, Antoine; Hacquebart, Pascal; Jourde, Jerome; Labrune, Celine; Lavesque, Nicolas; Meirland, Alain; Nebout, Thiebaut; Olivier, Frederic; Pelaprat, Corine; Ruellet, Thierry; Sauriau, Pierre-guy; Thorin, Sebastien.
Based on a parallel sampling conducted during autumn 2008, a comparative study of the intertidal benthic macrofauna among 10 estuarine systems located along the Channel and Atlantic coasts of France was performed in order to assess the level of fauna similarity among these sites and to identify possible environmental factors involved in the observed pattern at both large (among sites) and smaller (benthic assemblages) scales. More precisely this study focused on unraveling the observed pattern of intertidal benthic fauna composition and diversity observed at among-sites scale by exploring both biotic and abiotic factors acting at the among- and within-site scales. Results showed limited level of similarity at the among-site level in terms of intertidal...
Tipo: Text Palavras-chave: Estuaries; Macrozoobenthos; Diversity; Structuring Factors; WFD.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00179/29016/27444.pdf
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Range extension of the tanaidid Zeuxo holdichi (Bamber, 1990) along the northern coasts of France? ArchiMer
Foveau, Aurelie; Pezy, Jean-philippe; Bauxi, Noemie; Baffreau, Alexandrine; Bachelet, Quentin; Chouquet, Bastien; Dancie, Chloe; Ruellet, Thierry; Dauvin, Jean-claude.
The tanaidacean crustacean, Zeuxo holdichi was first described from Arcachon Bay, France, by Bamber in 1990. Since then, this species has been recorded several times in Europe, from Iberian Peninsula to Germany. In this present study, we report new records of this species along the northern coasts of France bordering the English Channel. It is hypothesized that Z. holdichi is being spread because of aquaculture activities.
Tipo: Text Palavras-chave: Crustacea; Tanaids; Zeuxo holdichi; English Channel; Northern distribution.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00451/56234/57794.pdf
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Surveillance écologique du site de production électronucléaire de Gravelines. Novembre 2017 – Octobre 2018 ArchiMer
Antajan, Elvire; Devreker, David; Loots, Christophe; Rocroy, Mélanie; Alizier, Sandrine; Ruellet, Thierry.
Ce travail constitue le 41ème rapport de surveillance du site électronucléaire de Gravelines dont la grande puissance énergétique est assurée par le fonctionnement de 6 tranches. Ce site, implanté sur le littoral, présente une prise d’eau de mer assurant le refroidissement du système et un rejet côtier d’eau chaude en surface. Le fonctionnement de la centrale a débuté en 1980 et elle a atteint la puissance maximale en 1986. La surveillance concerne les domaines pélagique (hydrologie, microbiologie, phytoplancton, zooplancton), halieutique (larves et œufs de sole, de sprat et crevettes grises), et benthique (intertidal et subtidal). La stratégie de surveillance est basée sur une approche spatiale et temporelle (i) Étude de l’impact immédiat par comparaison...
Tipo: Text Palavras-chave: Centrale nucléaire; Gravelines; Surveillance; Hydrologie; Halieutique; Plancton; Microbiologie; Benthos.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00487/59895/63077.pdf
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Surveillance Écologique et Halieutique Site de Gravelines. Novembre 2013 - Octobre 2014 ArchiMer
Antajan, Elvire; Lefebvre, Alain; Loots, Christophe; Luczak, Christophe; Ruellet, Thierry.
This is the 37th annual surveillance report concerning the nuclear power plant of Gravelines. Its very high power level results from six plant units located on the shore and is characterised by a cooling system with a coastal surface input and output. The production of electricity began in 1980 and reached maximum in 1986. Surveys concern monitoring of pelagic system (hydrology, microbiology, phytoplankton, and zooplankton), fish populations (larvae and eggs of Sole and Sprat) or crustaceans (shrimps), and benthic macrofauna (intertidal and subtidal). This survey deals with spatial and temporal approaches (i) study of the direct impact by comparison of the input and output seawater stations, (ii) study of medium and long term evolution of the area by...
Tipo: Text Palavras-chave: Centrale nucléaire; Gravelines; Surveillance; Hydrologie; Halieutique; Plancton – Microbiologie; Benthos; Nuclear power plant; Gravelines; Network survey; Hydrology; Fisheries; Plankton; Microbiology; Benthos.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00259/37004/35501.pdf
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Surveillance Écologique et Halieutique Site de Gravelines. Novembre 2014 - Octobre 2015 ArchiMer
Antajan, Elvire; Lefebvre, Alain; Loots, Christophe; Rocroy, Mélanie; Ruellet, Thierry.
This is the 38th annual surveillance report concerning the nuclear power plant of Gravelines. Its very high power level results from six plant units located on the shore and is characterised by a cooling system with a coastal surface input and output. The production of electricity began in 1980 and reached maximum in 1986. Surveys concern monitoring of pelagic system (hydrology, microbiology, phytoplankton, and zooplankton), fish populations (larvae and eggs of Sole and Sprat) or crustaceans (shrimps), and benthic macrofauna (intertidal and subtidal). This survey deals with spatial and temporal approaches (i) study of the direct impact by comparison of the input and output seawater stations, (ii) study of medium and long term evolution of the area by...
Tipo: Text Palavras-chave: Centrale nucléaire; Gravelines; Surveillance; Hydrologie; Halieutique; Plancton; Benthos; Microbiologie; Nuclear power plant; Gravelines; Network survey; Hydrology; Fisheries; Plankton; Microbiology; Benthos.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00332/44313/43879.pdf
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Surveillance Écologique et Halieutique. Site de Gravelines. Novembre 2015 - Octobre 2016 ArchiMer
Antajan, Elvire; Devreker, David; Lefebvre, Alain; Loots, Christophe; Rocroy, Mélanie; Ruellet, Thierry.
This is the 39th annual surveillance report concerning the nuclear power plant of Gravelines. Its very high power level results from six plant units located on the shore and is characterised by a cooling system with a coastal surface input and output. The production of electricity began in 1980 and reached a maximum in 1986. Surveys concern monitoring of pelagic system (hydrology, microbiology, phytoplankton, and zooplankton), fish populations (larvae and eggs of Sole and Sprat) or crustaceans (shrimps), and benthic macrofauna (intertidal and subtidal). This survey deals with spatial and temporal approaches (i) study of the direct impact by comparison of the input and output seawater stations, (ii) study of medium and long term evolution of the area by...
Tipo: Text Palavras-chave: Centrale nucléaire; Gravelines; Surveillance; Hydrologie; Halieutique; Plancton; Benthos; Microbiologie; Nuclear power plant; Gravelines; Network survey; Hydrology; Fisheries; Plankton; Microbiology; Benthos.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00383/49458/49957.pdf
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The ecological quality status of the Bay of Seine and the Seine estuary: Use of biotic indices ArchiMer
Dauvin, Jean-claude; Ruellet, Thierry; Desroy, Nicolas; Janson, Anne-laure.
Using recent indices developed, in part, for use under the European Water Framework Directive (AMBI, BENTIX, BOPA BQI, I2EC and the trophic index ITI), the ecological quality status of two highly contaminated environments-the Bay of Seine and the Seine estuary (Eastern English Channel)-was determined on several spatial and temporal scales. Data from 604 observations gathered over a 14-year period (1988-2002) were analyzed, and the results used to show the relationship between biotic indices, environmental variables and classic descriptors (e.g., number of species, total abundance, dominance index, ES(50) and Shannon/Brillouin diversities). Though the specific ecological quality (EcoQ) values calculated with the various indices were different, the overall...
Tipo: Text Palavras-chave: Benthic index; Biotic index; Macrobenthos; English Channel; Bay of Seine; Seine estuary.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2510.pdf
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