Evaluation of predator numerical responses

Jim Hone, Charles KREBS, Mark O'Donoghue, Stan Boutin

    Research output: Contribution to journalArticle

    17 Citations (Scopus)

    Abstract

    We evaluated hypotheses of the dynamics of predators (lynx) relative to prey (snowshoe hares) and predator abundance in the Yukon, Canada. The hypotheses were that predator (lynx) dynamics are influenced by prey density, or by both prey and predator densities. Annual lynx population growth rate (r), estimated from lynx counts, was positively related to previous hare density and negatively related to previous lynx density, as described by the best-fitting additive model (R 2 = 0.85). Annual lynx growth rate (r) estimated from lynx tracks was positively related to the ratio of hares per lynx in the best-fitting model (R 2 = 0.55). There was most support for the prey- and predator-dependent hypothesis of predator dynamics. Projected lynx tracks showed similar trends to observed abundance but lagged one year, emphasising the need for evaluation of projected predator trends
    Original languageEnglish
    Pages (from-to)335-341
    Number of pages7
    JournalWildlife Research
    Volume34
    Issue number5
    DOIs
    Publication statusPublished - 2007

    Fingerprint

    numerical response
    Lynx
    predator
    predators
    hares
    Lepus americanus
    evaluation
    Yukon Territory
    population growth
    Canada

    Cite this

    Hone, J., KREBS, C., O'Donoghue, M., & Boutin, S. (2007). Evaluation of predator numerical responses. Wildlife Research, 34(5), 335-341. https://doi.org/10.1071/WR06171
    Hone, Jim ; KREBS, Charles ; O'Donoghue, Mark ; Boutin, Stan. / Evaluation of predator numerical responses. In: Wildlife Research. 2007 ; Vol. 34, No. 5. pp. 335-341.
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    Hone, J, KREBS, C, O'Donoghue, M & Boutin, S 2007, 'Evaluation of predator numerical responses', Wildlife Research, vol. 34, no. 5, pp. 335-341. https://doi.org/10.1071/WR06171

    Evaluation of predator numerical responses. / Hone, Jim; KREBS, Charles; O'Donoghue, Mark; Boutin, Stan.

    In: Wildlife Research, Vol. 34, No. 5, 2007, p. 335-341.

    Research output: Contribution to journalArticle

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    AB - We evaluated hypotheses of the dynamics of predators (lynx) relative to prey (snowshoe hares) and predator abundance in the Yukon, Canada. The hypotheses were that predator (lynx) dynamics are influenced by prey density, or by both prey and predator densities. Annual lynx population growth rate (r), estimated from lynx counts, was positively related to previous hare density and negatively related to previous lynx density, as described by the best-fitting additive model (R 2 = 0.85). Annual lynx growth rate (r) estimated from lynx tracks was positively related to the ratio of hares per lynx in the best-fitting model (R 2 = 0.55). There was most support for the prey- and predator-dependent hypothesis of predator dynamics. Projected lynx tracks showed similar trends to observed abundance but lagged one year, emphasising the need for evaluation of projected predator trends

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