K
Keith A. Hobson
Researcher at University of Western Ontario
Publications - 686
Citations - 44822
Keith A. Hobson is an academic researcher from University of Western Ontario. The author has contributed to research in topics: Population & Trophic level. The author has an hindex of 103, co-authored 653 publications receiving 41300 citations. Previous affiliations of Keith A. Hobson include National Autonomous University of Mexico & Fisheries and Oceans Canada.
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Contemporary evolution of reproductive isolation and phenotypic divergence in sympatry along a migratory divide.
TL;DR: It is shown that differential migratory orientation facilitated reproductive isolation of sympatric populations within <30 generations, and it is hypothesized that restricted gene flow accelerates the evolution of adaptive phenotypic divergence toward the contrasting selection regimes.
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Using stable isotopes to trace long- distance dispersal in birds and other taxa
TL;DR: The identification of isotopic outliers within known populations will be an extremely useful first step in the forensic application of stable isotopes to identify dispersal in general, and LDD in particular.
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Contaminant residues in seabird eggs from the Canadian Arctic. Part I. Temporal trends 1975-1998.
TL;DR: Stable-nitrogen isotope analyses indicate that the temporal trends observed for contaminant concentrations in eggs were not the result of shifts in trophic level, and changing deposition patterns of xenobiotic compounds over the summer and winter ranges of these birds provide a likely explanation for differing exposures through time.
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Linking hydrogen (δ2H) isotopes in feathers and precipitation: sources of variance and consequences for assignment to isoscapes.
TL;DR: This extensive H isotopic analysis of known-origin feathers of songbirds in North America and elsewhere reconfirmed the strong coupling between tissue δ 2H and global hydrologic δ2H patterns, and accounting for variance associated with foraging substrate and migratory strategy, can be used in conservation and research.
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Polar bears make little use of terrestrial food webs: evidence from stable-carbon isotope analysis.
M. A. Ramsay,Keith A. Hobson +1 more
TL;DR: The amount of food that polar bears consume from terrestrial food webs appears negligible, even though some bears spend 1/3 or more of each year on land during the seasons of greatest primary productivity.