A seasonal comparison of trace metal concentrations in the tissues of Arctic charr (Salvelinus alpinus) in Northern Québec, Canada.

Martyniuk, Mackenzie Anne Clifford; Couture, Patrice ORCID: https://orcid.org/0000-0002-1944-5136; Tran, Lilian; Beaupré, Laurie; Urien, Nastassia et Power, Michael (2020). A seasonal comparison of trace metal concentrations in the tissues of Arctic charr (Salvelinus alpinus) in Northern Québec, Canada. Ecotoxicology , vol. 29 , nº 9. pp. 1327-1346. DOI: 10.1007/s10646-020-02248-7.

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Ecotoxicological research detailing trace metal contamination and seasonal variation in the tissues of northern fishes such as Arctic charr (Salvelinus alpinus) has been poorly represented in the literature beyond examination of mercury. In an effort to address this, anadromous Arctic charr were collected from the Deception River watershed in the late summer and post-winter season, before quantifying seasonal and organotropic variations in dorsal muscle and liver concentrations of arsenic, cadmium, chromium, copper, nickel, lead, and zinc. Potential linkages with biological variables (fork length, age, and somatic condition) and indicators of feeding behavior (δ13C and δ15N) were also assessed. Trace metal organotropism favouring elevation in liver tissue concentrations was exhibited by cadmium, copper, nickel and zinc, while arsenic, chromium and lead exhibited no significant organotropic variation. Seasonal differences in concentrations were metal and tissue dependent, but generally increased in tissues collected from post-winter sampled Arctic charr. Significant correlations with biological and trophic descriptors were also determined to be element and tissue dependent. These parameters, in addition to season, were incorporated into multi-predictor variable models, where variations in trace metal concentration data were often best explained when season, somatic condition, and trophic descriptors were included. These variables were also of greatest relative importance across all considered trace metals and tissue types. These findings suggest that seasonally linked processes have the greatest influence on trace metal concentrations in anadromous Arctic charr. Future metal-related research on Arctic charr and other northern fish species should further consider these variables when evaluating elemental accumulation.

Type de document:	Article
Mots-clés libres:	arctic charr; Salvelinus alpinus; trace metal contamination; Québec; Nunavik; seasonal variation
Centre:	Centre Eau Terre Environnement
Date de dépôt:	24 nov. 2020 15:33
Dernière modification:	15 févr. 2022 14:43
URI:	https://espace.inrs.ca/id/eprint/10642

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