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Registros recuperados: 21 | |
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Arzul, Genevieve; Videau, Christiane; Bodennec, Guy; Crassous, Marie-pierre; Youenou, Agnes. |
Pour mieux connaître les facteurs qui agissent sur les interactions trophiques entre le phytoplancton et le milieu nutritif, nous avons étudié la capacité hétérotrophe du phytoplancton en conditions contrôlées, non axéniques, au laboratoire. Les expériences réalisées avec la [U-14C] glutamine, étaient basées sur l'étude des vitesses d'assimilation. Les résultats obtenus avec deux espèces du genre Gymnodinium et une diatomée ont été vérifiés lors d'efflorescences en eau côtière et estuarienne, montrant l'adaptation des algues au milieu riche en substances organiques et leur capacité hétérotrophe en fonction de l'éclairement. L'effet de l'éclairement sur la capacité phagotrophe de Gymnodinium a été observé au laboratoire. L'étude réalisée sur les particules... |
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Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00105/21599/19179.pdf |
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Dreves, Luc; Arzul, Genevieve; Erard-le Denn, Evelyne; Quintin, Jean-yves; Piriou, Jean-yves; Martin, Jocelyne; Miossec, Dominique. |
Surveillance n° 9 of FLAMANVILLE power plant takes in account studies between march 1991 and september 1991. Hydrology, microbiology, phytoplankton, zooplankton, intertidal phytobenthos, intertidal and sublittoral zoobenthos, and fishing are studied. The year 1991 is the sixth year of working for this power plant. [NOT CONTROLLED OCR] |
Tipo: Text |
Palavras-chave: Surveillance; Pelagos; Halieutique; Centrale nucléaire; Benthos; Surveillance; Power plant; Pelagos; Fishing; Benthos. |
Ano: 1992 |
URL: https://archimer.ifremer.fr/doc/1992/rapport-6823.pdf |
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Arzul, Genevieve; Erard-le Denn, Evelyne; Quintin, Jean-yves; Piriou, Jean-yves; Dreves, Luc; Martin, Jocelyne; Miossec, Dominique. |
Surveillance n°5 of Flamanville power-plant takes in account studies between march 1987 and march 1988. Hydrology, microbiology, phytoplancton, zooplancton, intertidal phytobenthos, intertidal and sublittoral zoo benthos, fishing are studied. The year 1987 is the second year of working for this power plant. |
Tipo: Text |
Palavras-chave: Surveillancce; Centrale nucléaire; Halieutique; Benthos; Pelagos; Surveillance; Power plant; Fishing; Benthos; Pelagos. |
Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/1990/rapport-6469.pdf |
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Arzul, Genevieve. |
Les études entreprises sur le thème "Eaux colorées" durant les années 1984-1985 ont montré des résultats divers : - les essais de cultures de Dinophysis acuminata et de Gyrodinium aureolum ont donné des résultats fragmentaires tout en permettant de dégager quelques points positifs, mais les essais de mise en culture n'ont pas encore abouti. - les études hydrologiques à long terme pour la surveillance d'apparition de Gyrodinium aureolum en Baie de Douarnenez, Dinophysis acuminata dans un bassin du Havre et en Baie de Vilaine sont en voie d'achèvement. Y sont adjointes les observations faites sur les échantillons prélevés à Plogoff et Ploumoguer en 1978-80. - l'extraction des toxines de Gyrodinium aureolum, la standardisation du test souris pour le DSP,... |
Tipo: Text |
Palavras-chave: Eaux colorées; Dinophysis acuminata; Gyrodinium aureolum; Phyto-toxines; Sédiments. |
Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/00139/25020/23125.pdf |
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Arzul, Genevieve; Erard-le Denn, Evelyne; Quintin, Jean-yves; Piriou, Jean-yves; Dreves, Luc; Martin, Jocelyne; Miossec, Dominique. |
Surveillance n°6 of Flamanville power-plant takes in account studies between march 1988 and september 1988. Hydrology, microbiology, phytoplancton, zooplancton, intertidal phytobenthos, intertidal and sublittoral zoobenthos, fishing are studied. The year 1988 is the third year of working for this power plant. |
Tipo: Text |
Palavras-chave: Surveillance; Power plant; Fishing; Benthos; Pelagos; Surveillancce; Centrale nucléaire; Halieutique; Benthos; Pelagos. |
Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/1991/rapport-6470.pdf |
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Dreves, Luc; Arzul, Genevieve; Erard-le Denn, Evelyne; Quintin, Jean-yves; Piriou, Jean-yves; Martin, Jocelyne; Miossec, Dominique. |
Surveillance n° 10 of FLAMANVILLE power plant takes in account studies between march 1992 and september 1992. Hydrology, microbiology, phytoplankton, zooplankton, intertidal phytobenthos et zoobenthos, and fishing are studied. The year 1991 is the seventh year of working for this power plant. [NOT CONTROLLED OCR] |
Tipo: Text |
Palavras-chave: Surveillance; Power plant; Pelagos; Fishing; Benthos; Surveillance; Pelagos; Halieutique; Centrale nucléaire; Benthos. |
Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/1993/rapport-6824.pdf |
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Arzul, Genevieve; Erard-le Denn, Evelyne; Quintin, Jean-yves; Dreves, Luc; Martin, Jocelyne; Veron, Gerard. |
Surveillance n°4 of Flamanville power-plant takes in account studies between March 1986 an January 1987. Hydrology, microbiology, phytoplancton, zooplancton, intertidal and sublittoral benthos, fishing are studied. The year 1986 is the first year of working for this power plant. |
Tipo: Text |
Palavras-chave: Surveillancce; Centrale nucléaire; Halieutique; Benthos; Pelagos; Surveillance; Power plant; Fishing; Benthos; Pelagos. |
Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/1990/rapport-6468.pdf |
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Arzul, Genevieve; Youenou, A.; Derrien, Annick; Gentien, Patrick; Crassous, M.p.; Lunven, M.. |
The study of different chemical parameters characterizing the coastal sediment, showed a possible relation between, respectively, high levels in organic matter and total copper, and the "red tide" phenomenon. |
Tipo: Text |
Palavras-chave: Sédiment côtier; Eaux colorées; Matière organique; Cuivre; Coastal sediment; Red time; Organic matter; Copper. |
Ano: 1988 |
URL: http://archimer.ifremer.fr/doc/00425/53708/54565.pdf |
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Lehoerff, Genevieve; Erard-le Denn, Evelyne; Arzul, Genevieve. |
Four planktonic coastal ecosystems from the western Channel to the southern part of the North Sea have been compared. The characteristics of the south of the North Sea are a very high planktonic biomass with an annual maximum value of 45 mg C m-3 h-1 for primary production, a maximum of 11 mg m-3 for Chlorophyll a and 60 mg C m-3 for zooplanktonic biomass (expressed in term of carbon weight), linked with an oscillating ecosystem. In the western Channel primary production shows an annual maximum value of 8 mg C m-3 h-1, die chlorophyll a, a maximum of 2.5 mg m-3 and zooplanktonic carbon weight of 14 mg C m-3 linked to a greater inertia in the system. Turnover is faster in the north. Trophic efficiency ratios have been calculated and linked to hydrodynamic... |
Tipo: Text |
Palavras-chave: CHANNEL; COASTAL WATER ECOSYSTEM; PLANKTONIC BIOMASS; TROPHIC EFFICIENCY; IMPACT. |
Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00100/21130/18750.pdf |
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Akcha, Farida; Arzul, Genevieve; Rousseau, Sabrina; Bardouil, Michele. |
The alkaline comet assay was tested on different microalgae: the clinofiagellates, Karenia mikimotoi and Alexandrium minuturn, and the diatom, Chaetoceros gracilis. The microalgae were exposed during their exponential growth to the model direct genotoxicant, hydrogen peroxide (1 h, 5 and 100 pM H2O2). Following H2O2 exposure, the comet assay was validated only for K. mikimotoi for which genotoxicity was observed from the lowest tested concentration of 5 pM with a concentration-dependent effect. C. gracilis was too small in size (4 mu m) to be correctly analysed. For A. minuturn, our lysis buffer was not strong enough to digest the cellulosic thecal plates. For K. mikimotoi, the comet assay was thus applied for the study of the genotoxic effects of... |
Tipo: Text |
Palavras-chave: Comet assay; Genotoxicity; Pesticides; Phytoplankton. |
Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4504.pdf |
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Halgand, Daniel; Arzul, Genevieve; Cochard, Marie-laure; Erard-le Denn, Evelyne; Huet, Jerome; Dorobisz, Laurence; Rumebe, Myriam. |
Monitoring n°11, 2nd phase, of PENLY nuclear power - plant takes in account studies between April and September 2000. Hydrology, microbiology,phytoplankton, zooplankton and fishing are studied. |
Tipo: Text |
Palavras-chave: Pelagos; Halieutique; Centrale nucléaire; Surveillance; Pelagos; Fishing; Nuclear power plant; Monitoring. |
Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00079/19074/16669.pdf |
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Dreves, Luc; Arzul, Genevieve; Erard-le Denn, Evelyne; Quintin, Jean-yves; Martin, Jocelyne; Miossec, Dominique. |
Surveillance n°8 of FLAMANVILLE power plant takes in account studies between march 1990 and september 1990. Hydrology, microbiology, phytoplankton, zooplankton, intertidal zoobenthos and fishing are studied. The year 1990 is the fifth year of working for this power plant. [NOT CONTROLLED OCR] |
Tipo: Text |
Palavras-chave: Pelagos; Fisheries; Benthos; Monitoring; Flamanville; Nuclear power plant; Pelagos; Halieutique; Benthos; Surveillance; Flamanville; Centrale nucléaire. |
Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/1991/rapport-6799.pdf |
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Hourmant, Annick; Arzul, Genevieve. |
Parmi les substances azotées de la matière organique dissoute, les polyamines semblent jouer un rôle particulier. Ces molécules sont des produits de décarboxylation de l'arginine et de l'ornithine, acides aminés basiques dont le dernier est le 2eme en abondance (après la leucine) dans les populations vieillissantes de la diatomée Chaetoceros gracile (Poulet et Martin-Jezequel, 1983). Les polyamines comprennent différentes molécules : la putrescine, la cadavérine, la spermine, la spermidine ... et résultent d'une façon générale, de toute dégradation de matière organique. Or ces molécules se rencontrent aussi dans les cellules algales en cours de division (Hourmant et al., 1994), principalement au début de la phaseS (Maiss et al., 1982) et avant... |
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Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00105/21642/19223.pdf |
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Arzul, Genevieve; Dreves, Luc; Erard-le Denn, Evelyne; Clabault, Philippe; Halgand, Daniel; Quiniou, Françoise; Tetard, Alain; Vincke, Marie-claude. |
La surveillance n° 2 sur le site de PENLY couvre la période d'avril 88 à octobre 88. Les domaines étudiés sont : l'hydrologie, la microbiologie, le plancton végétal et animal, la géologie, le zoobenthos intertidal et sublittoral, le domaine halieutique. |
Tipo: Text |
Palavras-chave: Pelagos; Benthos; Halieutique; Centrale nucléaire; Surveillance; Pelagos; Benthos; Fishing; Power plant; Surveillance. |
Ano: 1993 |
URL: https://archimer.ifremer.fr/doc/00432/54390/55720.pdf |
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Hourmant, Annick; Amara, Anis; Pouline, Patrick; Durand, Gael; Arzul, Genevieve; Quiniou, Francoise. |
The herbicide bentazon (CASRN 25057-89-0) is extensively used in agriculture in Brittany (France) to replace atrazine. Bentazon is not readily adsorbed by soil and therefore it enters adjacent freshwater ecosystems, making its way to estuarine and marine waters areas. Information regarding its effects on marine ecosystems is scarce. Phytotoxicity assessments were conducted in the laboratory on the common diatom Chaetoceros gracilis using both the active ingredient and its formulated product (Basamais). The 3 day EC50 Using cell counts were, respectively, 150 mg/L and 60 mu g/L for bentazon active ingredient and for bentazon-formulated while cellular volume was increased. Although bentazon is known as a photosystem II inhibitor, it produced an increase of... |
Tipo: Text |
Palavras-chave: Photosynthesis; Marine diatom; Growth; Chlorophylls; Chaetoceros gracilis; Carotenoids; Bentazon; ATP. |
Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6637.pdf |
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Arzul, Genevieve; Erard-le Denn, Evelyne; Quintin, Jean-yves; Piriou, Jean-yves; Dreves, Luc; Martin, Jocelyne; Miossec, Dominique. |
Surveillance n°7 of Flamanville power-plant takes in account studies between march 1989 and september 1989. Hydrology, microbiology, phytoplancton, zooplancton, intertidal phytobenthos, intertidal and sublittoral zoobenthos, fishing are studied. The year 1989 is the fourth year of working for this power plant. [NOT CONTROLLED OCR] |
Tipo: Text |
Palavras-chave: Surveillance; Centrale nucléaire; Halieutique; Benthos; Pelagos; Power plant surveillance; Fishing; Benthos; Pelagos. |
Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/1990/rapport-6798.pdf |
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Halgand, Daniel; Arzul, Genevieve; Cochard, Marie-laure; Erard-le Denn, Evelyne; Huet, Jerome; Le Claire, Jacques; Quiniou, Francoise. |
Monitoring n°10, 2nd phase, of PENLY nuclear power - plant takes in account studies between March and september 1999. Hydrology, microbiology,phytoplankton, zooplankton and fishing are studied. |
Tipo: Text |
Palavras-chave: Pelagos; Halieutique; Centrale nucléaire; Surveillance; Pelagos; Fishing; Nuclear power plant; Monitoring. |
Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00080/19075/16670.pdf |
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Registros recuperados: 21 | |
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