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Individual specialization in diet by a generalist marine predator reflects specialization in foraging behaviour.
- Kerry J. Woo, K. Elliott, Melissa Davidson, A. J. Gaston, G. Davoren
- Environmental ScienceThe Journal of animal ecology
- 1 November 2008
It is suggested that guillemots specialize on a single foraging strategy regardless of whether chick-provisioning and self-feeding and the development of individual specialization may be an important precursor to diversification among seabirds.
High flight costs, but low dive costs, in auks support the biomechanical hypothesis for flightlessness in penguins
- K. Elliott, R. Ricklefs, A. J. Gaston, S. Hatch, J. Speakman, G. Davoren
- BiologyProceedings of the National Academy of Sciences
- 20 May 2013
The hypothesis that function constrains form in diving birds is supported, and that optimizing wing shape and form for wing-propelled diving leads to such high flight costs that flying ceases to be an option in larger wing- Propelled diving seabirds, including penguins.
Density-Dependence in the Survival and Reproduction of Bald Eagles: Linkages to Chum Salmon
It is suggested that eagle populations in the Pacific Northwest are currently partially limited by density on the breeding grounds and partially by adult mortality in late winter, likely due to reduced late winter salmon stocks forcing eagles to exploit more marginal prey supplies.
PCBs and DDE, but not PBDEs, increase with trophic level and marine input in nestling bald eagles.
Accelerometry predicts daily energy expenditure in a bird with high activity levels
- K. Elliott, Maryline Le Vaillant, A. Kato, J. Speakman, Y. Ropert‐Coudert
- BiologyBiology Letters
- 23 February 2013
It is shown that accelerometers can provide an accurate integrated measure of energy expenditure in wild animals using many different locomotory modes and that dynamic body acceleration was a good predictor of daily energy expenditure as measured independently by doubly labelled water.
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.
Polyhalogenated aromatic hydrocarbons and metabolites: Relation to circulating thyroid hormone and retinol in nestling bald eagles (Haliaeetus leucocephalus)
It is concluded that current environmental exposures to PCBs in British Columbia and in southern California are associated with significant decreases in T4, suggesting a potential negative effect on the endocrine system of nestling bald eagles.
Central-Place Foraging in an Arctic Seabird Provides Evidence for Storer-Ashmole's Halo
- K. Elliott, Kerry J. Woo, A. J. Gaston, S. Benvenuti, L. Dall'Antonia, G. Davoren
- Environmental Science
- 4 August 2009
It is suggested that populations of central-place foragers are partially regulated by prey depletion, and pelagic species responded to seabird foraging pressure by moving away from the colony, creating a three-dimensional halo.
Sex-specific behavior by a monomorphic seabird represents risk partitioning
It is proposed that risk partitioning may contribute to the prevalence of sex-specific behaviors in monomorphic animals and that patterns are likely context specific rather than species specific.
Temporal trends of perfluoroalkyl substances (PFAS) in eggs of coastal and offshore birds: Increasing PFAS levels associated with offshore bird species breeding on the Pacific coast of Canada and…
- Aroha A. Miller, J. Elliott, K. Elliott, Sandi L. Lee, Francois Cyr
- Environmental ScienceEnvironmental toxicology and chemistry
- 1 August 2015
Little temporal change was seen in stable isotope values, indicating that diet alone is not driving observed PFAS concentrations.