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| Delesmont, R; Delesmont, E. |
| La qualité biologique du milieu marin peut être appréciée à l'aide de tests utilisant des organismes vivants. Parmi ces tests le développement embryonnaire des bivalves présente un intérêt particulier car, durant cette période, les bivalves sont très sensibles à la qualité de l'eau et fournissent une réponse rapide sans demander d'apport de nourriture. Suite aux études déjà réalisées au centre Ifremer de Brest et à nos essais de 1992 et 1993, nous avons travaillé avec l' huître Crassostrea gigas de la fécondation à la fondation de larve "D" (La durée de cette période larvaire est de 24 heures à 24 OC). Une série de tests a également été réalisée sur des larves de moules (Mytilus edulis) avec une incubation de 48 heures à 20°C correspondant au passage de l'... |
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| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00033/14414/11708.pdf |
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| Lefebvre, Alain; Antajan, Elvire; Delesmont, R; Dewarumez, J. M.; Luczak, C. |
| This is the 30th annual surveillance report concerning the central nuclear power plant of Gravelines. This 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. Surveillance studies concern monitoring of fish populations (larvae and eggs of Sole and Sprat) or crustaceans (shrimps), benthic system (intertidal and subtidal) and pelagic system (hydrology, microbiology, phytoplancton, zooplancton). 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... |
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Palavras-chave: Benthos; Microbiologie; Plancton; Halieutique; Hydrologie; Surveillance; Gravelines; Centrale nucléaire; Benthos; Microbiology; Plankton; Fisheries; Hydrology; Network survey; Gravelines; Nuclear power plant. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/rapport-4007.pdf |
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| Grossel, Hubert; Delesmont, R. |
| Phaeocystis , a nanoplanktonic algae, appears in the eastern Channel and in the south of the North Sea, at the end of the microplanktonic spring outburst, with often considerable density. At that time, acrylic acid is excreted in the water. On account of its well known antibiotic activity, one could wonder if a bloom of Phaeocystis might be responsible for an antibacterial effect of the sea water. Acrylic acid has been detected in spring 1981 during the Phaeocystis bloom. Its concentration was greatly inferior to the 50% inhibitory concentration measured in vitro against natural bacterial population. Furthermore, results about primary and heterotrophic productions show a sharp synchronism in the peak of intensity. This means, at least, there is no... |
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Palavras-chave: ANE; North Sea Phaeocystis Antibiotics Nannoplankton Bacteria Algae Microorganisms Biological production Acrylic acid Algal blooms Interspecific relationships Heterotrophic organisms. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-983.pdf |
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