Climate change, contaminants, ecotoxicology and overwintering ecology of Arctic seabirds near their southern range limits (M20; 2019-20).

In this study, we are examining the behaviour, physiology, and contaminant exposure of thick-billed murres (Uria lomvia) breeding in northern Hudson Bay, Canada and overwintering off the coast of Nunatsiavut and Newfoundland/Labrador. In 2019, we collected eggs and blood samples from birds wearing year-round geolocators. Eggs and blood samples were collected from adult thick-billed murres that wore geolocators to track their foraging and migratory behavior year-round. The blood samples were used to determine circulating concentrations of thyroid hormones (free (F)/total (T) triiodothyronine, T3; F/T thyroxine, T4), corticosterone, oxidative stress, and stable isotopes as a proxy for the diet of the birds. Both blood samples and eggs were used to determine total mercury (Hg), methyl mercury (MeHg), per-/polyfluoroalkyl substances (PFAS) and historical brominated flame retardants (BFRs). To date (April 2020), the following laboratory analysis has been completed: blood concentrations of thyroid hormones, Hg and MeHg, along with egg concentrations of Hg and MeHg. Due to the Covid-19 pandemic, analysis of the remaining biomarkers and chemicals has had to be postponed as all laboratories and field work have been shut down until further notice.

Metadata Access
Creator Elliott, Kyle; Fernie, Kim; Letcher, Robert; Patterson, Allison; Thomas, Phil
Publisher Canadian Cryospheric Information Network
Contributor Polar Data Catalogue
Publication Year 2020
Rights Research programs, CCIN, or ArcticNet take no liability for the use or transmission of this data
OpenAccess true
Contact kim.fernie(at); pdc(at)
Language English
Format Computer file
Discipline Chemistry;Ecology
Spatial Coverage (-84.139W, 61.000S, -81.561E, 64.000N)
Temporal Coverage Begin 2019-04-01T00:00:00Z
Temporal Coverage End 2020-04-15T00:00:00Z