Potential Effect of Migration Strategy on Pollutant Occurrence in Eggs of Arctic Breeding Barnacle Geese (Branta leucopsis)

Daniel J. Hitchcock, Tom Andersen, Oystein Varpe, Maarten J. J. E. Loonen, Nicholas A. Warner, Dorte Herzke, Ingunn M. Tombre, Larry R. Griffin, Paul Shimmings, Katrine Borga*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)

Abstract

Arctic-breeding geese acquire resources for egg production from overwintering grounds, spring stopover sites and breeding grounds, where pollutant exposure may differ. We investigated the effect of migration strategy on pollutant occurrence of lipophilic polychlorinated biphenyls (PCBs) and protein-associated poly- and perfluoroalkyl substances (PFASs) and mercury (Hg) in eggs of herbivorous barnacle geese (Branta leucopsis) from an island colony on Svalbard. Stable isotopes (delta C-13 and delta N-15) in eggs and vegetation collected along the migration route were similar. Pollutant concentrations in eggs were low, reflecting their terrestrial diet (Sigma PCB = 1.23 +/- 0.80 ng/g ww; Sigma PFAS = 1.21 +/- 2.97 ng/g ww; Hg = 20.17 +/- 7.52 ng/g dw). PCB concentrations in eggs increased with later hatch date, independent of lipid content which also increased over time. Some females may remobilize and transfer more PCBs to their eggs, by delaying migration several weeks, relying on more polluted and stored resources, or being in poor body condition when arriving at the breeding grounds. PFAS and Hg occurrence in eggs did not change throughout the breeding season, suggesting migration has a greater effect on lipophilic pollutants. Pollutant exposure during offspring production in arctic-breeding migrants may result in different profiles, with effects becoming more apparent with increasing trophic levels.

Original languageEnglish
Pages (from-to)5427-5435
Number of pages9
JournalEnvironmental science & technology
Volume53
Issue number9
DOIs
Publication statusPublished - 7-May-2019

Keywords

  • PERSISTENT ORGANIC POLLUTANTS
  • TEMPORAL TRENDS
  • INCOME DICHOTOMY
  • CLUTCH SIZE
  • PCBS
  • BIOACCUMULATION
  • GOOSE
  • CONTAMINANTS
  • SUBSTANCES
  • INCUBATION

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