Cadmium and other elements in tissues from four ungulate species from the Mackenzie Mountain region of the Northwest Territories, Canada

摘要: Abstract Tissue samples from four ungulate species the south Mackenzie Mountain region of Northwest Territories (NT), Canada, were analysed for stable and radioactive elements 15N 13C isotopes. Elevated Cd concentrations in moose (Alces americanus) kidney have been observed are a health care concern consumers traditional foods. This study examined factors associated with, potential renal effects from, accumulation cadmium, interactions with other sympatric species. Mean concentration was highest (48.3 mg/kg ww), followed by mountain caribou (Rangifer tarandus caribou) (13.9 mg/kg ww) goat (Oreamnos (5.78 mg/kg ww). No local sources evident elevated levels considered to be natural origin. Conversely, total Hg significantly higher (0.21 mg/kg than (0.011 mg/kg 134Cs (t½=2.1 y) Dall's sheep (Ovis dalli) muscle is evidence deposition Fukushima reactor accident 2011. 137Cs (t½=30.2 all ungulates primarily remnant nuclear weapons tests 1960s. The both nuclides low risk animals people consuming them negligible. Stable isotope δ15N δ13C signatures showed separation between caribou, lichen-dominated diet, moose, which browse shrubs forbs. Isotope generalist feeding patterns. Differences elemental radionuclide attributed relative metal different food items diets respective Kidneys each minor histological changes proximal tubule glomerulus, although glomerular rare kidney. Kidney function not expected affected any Provisional Monthly Intake recommendations WHO indicate that organs will continue public concern. However, foods an important nutritional component northern diets, particularly consideration shift towards store-bought food.