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| Amiard, Jc; Queguiner, F; Camus, Y. |
| Mean Cd, Cu and Pb concentrations in waters of the Celtic Sea surface layer were found to be 12.4, 55.8 and 36.6 ng.l-1 respectively. From 10 meters below the surface to a depth of 4,400 m, the values are of the same order of magnitude, even in oceanic waters close to the continental slope. Nevertheless, we noticed a wide spread from maxima to minima especially near the surface. On the basis of metal concentration data together with physical (temperature, salinity), chemical (phosphates, nitrites, nitrates, silicates, ammonium and oxygen) and biological (chlorophyll a and phaeophytin rates) parameters, the surface waters of the Celtic Sea can be subdivided into four zones: one inside the Ushant front; a second, called "mer d'Iroise", and finally, south and... |
| Tipo: Text |
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| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00102/21372/18972.pdf |
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| Geffard, A; Geffard, Olivier; His, Edouard; Amiard, Jc. |
| The bioavailability of Cd, Cu and Zn from a metal-contaminated sediment was studied using Mytilus galloprovincialis embryos and larvae exposed to sediment elutriates, The elutriate concentrations tested were always lower than the threshold at which abnormal larval development appears. The Cd, Cu and Zn contents of the sediment, of the elutriate and of the larvae, as well as the larval growth, the condition index (CI), and the induction of metallothionein (NIT) in the larvae were measured. The Cl was only affected after 96 h of exposure, principally at the highest elutriate concentration (25%, corresponding to 0.1435 mug Cd l(-1) and 14 mug Zn l(-1)). Cd, Cu and Zn bioaccumulation was observed (48 and 96 h), in whole larvae as well as in the cytosolic... |
| Tipo: Text |
Palavras-chave: Sediment elutriate; Mytilus galloprovincialis larvae; Metal bioaccumulation; Metallothionein. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00000/10119/7598.pdf |
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