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Heral, Maurice / Alzieu, Claude / Deslous-paoli, Jean-marc - 1989Organotin salts, used as antifouling substances have a deleterious effect on the environment particularly on molluscs and especially on the Japanese oyster Crassostrea gigas. A synthesis of the effects of tributyltin (TBT) on cultured molluscs reveals the following effects: 1) acute and chronic...Contributeur (s):
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Heral, Maurice / Berthome, Jean-paul / Polanco Torres, E. / Alzieu, Claude / Deslous-paoli, Jean-marc / Razet, Daniel / Garnier, Jacqueline - 1981The appearance and changes of the oyster shell's gelatinous bags have been monitored since 1979. The increase in thickness that causes the growth into a "ball" can be explained by an overproduction of gel. The various environmental factors that can intervene in the secretion of gel...Contributeur (s):
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Alzieu, Claude / Heral, Maurice - 1984The toxic effect of trialkyltin compounds is used in antifouling paints to protect vessels against biofouling organisrns. Tributyltin oxide (TBTO) or fluoride (TBTS) leaches by diffusion from the paint layer into the seawater. Trialkyltin compounds in aqueous solutions are resistant to hydrolysis...Contributeur (s):
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Chagot, Dominique / Alzieu, Claude / Sanjuan, Jane / Grizel, Henri - 1990Shell malformations and histological effects of environmental concentrations of TBTF (2, 13.1 and 64.8 ng/!) were assessed on adult oysters Crassostrea gigas during a I-month experiment, incIuding both an exposure and a depuration phase. The results showed that the digestive gland is the primary...Contributeur (s):
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Alzieu, Claude - 1972The necessity to combat oil slicks makes it necessary to assess the relative effectiveness and toxicity of dispersal agents used. This is usually done by using individual or groups of indicator organisms. The theory behind the various approaches is outlined, and some considerations are listed for...Contributeur (s):
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Alzieu, Claude - 1977The laboratory tests showed that the diflubenzuron does not present acute toxicity to shellfish and fish, but can affect the survival rate of Artemia salina and Palaemonetes varians, when its concentration rises to the level of its water solubility. The insecticide persistence in sea water had been...Contributeur (s):
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Experiments in oyster-breeding areas where oyster Crassostrea gigas suffers from anomalies of calcification, show an obvious correlation between the importance of the malformation of shells and the vicinity of port areas where a great number of boats usually stay. Organotin compounds contained in...Contributeur (s):
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Alzieu, Claude / Thibaud, Yves / Heral, Maurice / Boutier, Bernard - 1980The boats cruising in the oyster growing areas are protected against biofouling by paints which release toxic compounds such as copper oxide and organotins into the water. After an estimation of the inputs of copper and organotins in the "Marennes-Oleron", Arcachon (Atlantic) and Thau...Contributeur (s):
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Alzieu, Claude / Duguy, Raymond / Babin, Philippe - 1982Contamination of Delphinidae's fetuses and newborn has been determined from the organochlorine levels found in the fetuses and pregnant female organs, and in the milk of lactating females, for 4 dolphins and 3 porpoises. High levels of these components show an important transference of mother...Contributeur (s):
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Andersen, C / Thibaud, Yves / Alzieu, Claude - 1984At the various intermolt stages (A, B, C, D) the cephalothorax, abdominal muscle, exoskeleton and legs of shrimp Crangon crangon L.from the Seine Bay estuary have been analyzed for Hg, Cd, Cu, Fe and Zn. A statistical test of the results of the metal analyses, and the variations of the...Contributeur (s):
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Alzieu, Claude / Abarnou, Alain / Bassoullet, Philippe / Boutier, Bernard / Chiffoleau, Jean-francois / Crenn, Isabelle / Derrien, Annick / Erard-le Denn, Evelyne / Gourmelon, Michele / Guiliaud, Jean-françois / Silva Jacinto, Ricardo / Le Cann, Pierre / Le Guyader, Françoise / Le Hir, Pierre / L'Yavanc, Jacky / Mauvais, Jean-louis / Menard, Dominique / Michel, Pierre / Monbet, Yves / Pommepuy, Monique / Quiniou, Francoise - 1999Port activities require continuous or occasional dredging of considerable quantities of sediments : approximately 50 million m3 along the French coastline. A large proportion of the dredgings is authorized for dumping at sea in geographically delimited areas and following an impact evaluation of...Contributeur (s):