: Soils in New Caledonia are particularly rich in metals among which Fe and Ni are intensively exploited. Due to important natural erosion in tropical latitudes and to mining activities, coastal waters are enriched in Co, Cr, Fe and Ni. In deeper waters lives a cephalopod species which is considered as a living fossil, the nautilus Nautilus macromphalus. In this study, 12 traces elements were analysed in the tissues of 4 nautilus specimens. Results showed high metal concentrations compared to data available for cephalopod from temperate waters. These concentrations were often in the same order than those encountered in bivalves or gastropods from contaminated areas. Relatively high concentrations of Ni and Cr in the hemolymph strongly suggest a high exposure of N. macromphalus to these metals. Among the tissues, the digestive gland have the highest concentrations of Cd, Co, Fe, V and Zn while for Ag, Al, As, Cr and Ni, renal and pericardial appendages exhibited the highest values. Despite this, the digestive gland contained the largest quantities of all metals with the exception of As and Mn which were mainly found in the body 2 muscular remains. These results highlighted the major role of digestive gland and excreting organs in the metabolism of metals in these cephalopod species.
Purpose
– The purpose of this poster is to present the new Lausanne Laboratory Lesson Study.
Design/methodology/approach
– It stresses the links between six dimensions of this research center.
Findings
– The poster provides a list of current researches and a list of publications.
Originality/value
– This research center is the first about Lesson Study in French-speaking countries.
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