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Inter-specific and ontogenic differences in delta C-13 and delta N-15 values and Hg and Cd concentrations in cephalopods ArchiMer
Chouvelon, Tiphaine; Spitz, Jerome; Cherel, Y.; Caurant, Florence; Sirmel, R.; Mendez-fernandez, P.; Bustamante, Paco.
Chemical tracers (e. g. stable isotopes or trace metals) are increasingly used to study trophic ecology and feeding habits of marine organisms and various factors can affect their values. The aim of the present study was to provide information on ontogenic effects on stable carbon and nitrogen values (delta C-13 and delta N-15) and on cadmium (Cd) and mercury (Hg) concentrations in 5 cephalopod species from the Bay of Biscay (North-East Atlantic Ocean). To this end, individuals belonging to 3 species showing the widest range of sizes were analysed for muscle delta C-13 and delta N-15 values and muscle Hg, and digestive gland Cd concentrations. Results showed that stable isotope ratios allowed discrimination of specific feeding strategies during...
Tipo: Text Palavras-chave: Stable isotopes; Metals; Trace elements; Ontogenesis; Prey; Ecological tracer; Northeastern Atlantic.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00166/27761/25938.pdf
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