Share This Author
Inter-annual variation in the breeding chronology of arctic shorebirds: effects of weather, snow melt and predators.
It is hypothesised that when predation risk is high, the value of potential re-nesting exceeds the energetic risks of early breeding, and timing of arrival and breeding for shorebirds at four sites in the eastern Canadian arctic is affected.
Immune function, stress response, and body condition in arctic-breeding common eiders in relation to cadmium, mercury, and selenium concentrations.
- M. Wayland, H. G. Gilchrist, T. Marchant, J. Keating, J. Smits
- BiologyEnvironmental research
- 1 September 2002
Relationships between trace metal concentrations in tissues of common eider ducks (cadmium, mercury, and selenium) and selected biomarkers of health (stress response, immune function, and body condition) are examined at an eider nesting colony in the Canadian arctic in 1998 and 1999.
Longer ice-free seasons increase the risk of nest depredation by polar bears for colonial breeding birds in the Canadian Arctic
- S. Iverson, H. G. Gilchrist, P. Smith, A. J. Gaston, M. Forbes
- Environmental ScienceProceedings of the Royal Society B: Biological…
- 22 March 2014
Examination of polar bears’ use of an ancillary prey resource, eggs of colonial nesting birds, in relation to diminishing sea ice coverage in a low latitude region of the Canadian Arctic shows how changes in abiotic conditions caused by climate change have altered predator–prey dynamics and are leading to cascading ecological impacts in Arctic ecosystems.
Has early ice clearance increased predation on breeding birds by polar bears?
Observations of at least 6 bears consuming large numbers of snow goose eggs at two locations in the eastern low Arctic in 2004 and 2006 highlight the complexity of trophic interactions that may occur in a changing Arctic.
Elevated mercury levels in a declining population of ivory gulls in the Canadian Arctic.
Concentrations of Cadmium, Mercury and Selenium in Blood, Liver and Kidney of Common Eider Ducks from the Canadian Arctic
- M. Wayland, A. García-Fernández, E. Neugebauer, H. G. Gilchrist
- Environmental ScienceEnvironmental monitoring and assessment
- 1 October 2001
Predictive equations developed here should not be used to predict consistently, concentrations of mercury in blood from those in liver based on samples taken in one year.
Seabird diet indicates changing Arctic marine communities in eastern Canada.
Seabird diet indicates changing Arctic marine communities in eastern Canada J. F. Provencher*, A. J. Gaston, P. D. O’Hara, H. G. Gilchrist Department of Biology, University of Victoria, Victoria,…
Climate change, ice conditions and reproduction in an Arctic nesting marine bird: Brunnich's guillemot (Uria lomvia L.)
Summary 1 We compared the reproduction of a marine diving bird, Brunnich's guillemot (Uria lomvia), breeding at two Arctic colonies close to the northern and southern limits of the species’…
Pre-laying climatic cues can time reproduction to optimally match offspring hatching and ice conditions in an Arctic marine bird
- O. Love, H. G. Gilchrist, S. Descamps, C. Semeniuk, J. Bêty
- Environmental ScienceOecologia
- 15 July 2010
Inter-annual relationships between climatic variation and the timing of reproduction in Canada’s largest breeding population of Arctic common eiders in East Bay, Nunavut are investigated and light is shed on how reproductive timing is related to and influenced by variation in local climate and how climate-related variation in reproductive timing influence a fitness measure in an Arctic species.
Genetic evidence for kin-based female social structure in common eiders (Somateria mollissima)
Throughout each of several stages including in-flight colony arrival, nesting, and brood rearing, the first genetically confirmed evidence of female kin-based social groups in common eiders and anseriformes in general is provided.