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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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Stable-Nitrogen Isotope Enrichment in Avian Tissues Due to Fasting and Nutritional Stress: Implications for Isotopic Analyses of Diet
TL;DR: A mechanism of tissue 6'5N enrichment due to reduced nutrient intake is hypothesized and the implications of these results to ecosystem studies using stable-nitrogen isotope analysis are discussed.
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Using stable isotopes to determine seabird trophic relationships
TL;DR: Stable isotopes of nitrogen and carbon analyses suggest that lower trophic-level organisms are more important to several seabirds than was recognized previously and may be a good indicator of inshore versus offshore feeding preference.
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From birds to butterflies: animal movement patterns and stable isotopes
TL;DR: Stable isotope patterns in nature are reviewed and recent tracking applications in a range of taxa are discussed and a series of key issues and assumptions are discussed to aid in the interpretation and design of effective and insightful isotope movement studies.
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Influence of chemical and biological factors on trophic transfer of persistent organic pollutants in the northwater polynya marine food web.
TL;DR: Results of this study show the utility of using delta 15N to characterize trophic level andtrophic transfer of POPs but highlight the effects of species and chemical differences on trophIC transfer of Pops that can be overlooked when a single magnification factor is applied to an entire food web.
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Comparative equilibration and online technique for determination of non-exchangeable hydrogen of keratins for use in animal migration studies.
TL;DR: A rapid, low cost, analytical approach to facilitate online continuous-flow isotope-ratio mass spectrometry (CF-IRMS) δD analyses of keratins through the use of calibrated keratin working standards and "comparative equilibration" to correct for the effects of moisture on exchangeable hydrogen.