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Task 4 - Exposure to metal contaminants for Northern population
Task 4a - Partner in charge:
Eric Dewailly (Nasivvik-Québec, affiliated to partner 1)
Hg and Se concentrations and isotopic compositions in local consumption products (mollusc,
fish, beluga) - (M. Lemire, P. Ayotte, E. Dewailly, C. Cloquet).
This sub-task aims to acquire the first combined Hg-Se isotopic composition on selected country food for
Nunavik population (available from a sample bank and collected through visits of villages). In particular,
three important parts of beluga will be analyzed (skin, blubber, meat). Samples will be collected and
prepared by partner 1 and send to partner 2 for isotopic analyses by multi-collector ICP-MS. Results will
be interpreted taking into account the trophic position of animals. The isotopic composition of various
parts of a given animal will be linked to our knowledge of bio-accumulation through the different organs
and any isotopic variations will be interpreted as possible transfer reactions and reservoir effects. Results
from sub-task 4a will be used for data interpretations in sub-task 4b.