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Martyniuk MAC, Couture P, Tran L, Beaupré L, Urien N, Power M. A seasonal comparison of trace metal concentrations in the tissues of Arctic charr (Salvelinus alpinus) in Northern Québec, Canada. ECOTOXICOLOGY (LONDON, ENGLAND) 2020; 29:1327-1346. [PMID: 32794028 DOI: 10.1007/s10646-020-02248-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/30/2020] [Indexed: 06/11/2023]
Abstract
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.
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Affiliation(s)
- Mackenzie Anne Clifford Martyniuk
- Institut National de la Recherche Scientifique-Centre Eau, Terre, Environnement, 490 Rue de la Couronne, Québec, QC, G1K 9A9, Canada.
| | - Patrice Couture
- Institut National de la Recherche Scientifique-Centre Eau, Terre, Environnement, 490 Rue de la Couronne, Québec, QC, G1K 9A9, Canada
| | - Lilian Tran
- Nunavik Research Centre, P.O. Box 179, Kuujjuaq, Québec, QC, J0M 1C0, Canada
| | - Laurie Beaupré
- Makivk Corporation, 1111 Boulevard Dr. Frederik-Philips, Saint-Laurent, Québec, QC, H4M 2x6, Canada
| | - Nastassia Urien
- Institut National de la Recherche Scientifique-Centre Eau, Terre, Environnement, 490 Rue de la Couronne, Québec, QC, G1K 9A9, Canada
| | - Michael Power
- University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada
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Ghiasi F, Mirzargar S, Badakhshan H, Amoli JS. Influence of Iranian Natural Zeolite on Accumulation of Cadmium in Cyprinus carpio Tissues Following Exposure to Low Concentration of Cadmium. ACTA ACUST UNITED AC 2011. [DOI: 10.3923/ajava.2011.636.641] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Glover CN, Hogstrand C. In vivo characterisation of intestinal zinc uptake in freshwater rainbow trout. J Exp Biol 2002; 205:141-50. [PMID: 11818420 DOI: 10.1242/jeb.205.1.141] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
SUMMARY
Knowledge of the uptake mechanisms and metabolism of metals is essential for understanding the factors governing metal toxicity, discerning means by which acclimation and homeostasis may be achieved and characterising interactions between the metal of interest and other environmental moieties. Zinc is both an important aquatic contaminant and a vital micronutrient. The physiological characterisation of dietary zinc absorption in fish has, therefore, important implications for environmental protection and aquaculture. The present study aimed to elucidate the mechanism of intestinal zinc uptake in freshwater rainbow trout (Oncorhynchus mykiss), using an in vivo cannulation technique. Only a saturable component of zinc uptake, with a concentration giving half-maximal rate of accumulation (K0.5) of 309 μmol l–1, and a maximal rate of accumulation (Jmax) of 933 nmol kg–1 h–1, was described. This characterised the intestine as a low-affinity, high-capacity zinc absorption pathway. Physiological mechanisms appear to regulate zinc uptake. Intestinal mucus was one important regulatory locus, promoting zinc uptake at low concentrations yet buffering the animal against high luminal zinc loads. Regulatory mechanisms also seemed to limit subepithelial zinc accumulation. Experiments using ethylene glycol tetraacetic acid (EGTA) to wash the intestinal lumen following zinc perfusion exhibited a higher proportion of loosely associated zinc at higher perfused concentrations. This was attributed to saturation of the uptake process or efflux from the subepithelium. Two distinct pathways for passage of zinc across the epithelium were discerned, with post-intestinal transfer possibly mediated by sulphydryl groups, as illustrated by N-ethylmaleimide perfusion experiments. Putative roles of zinc transporters and/or intracellular-binding proteins are discussed.
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Affiliation(s)
- Chris N Glover
- Division of Life Sciences, King's College, London, London SE1 9NN, UK.
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