Invasive species management in two-patch environments : Agricultural damage control in the raccoon (Procyon lotor) problem, Hokkaido, Japan

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著者

    • Kotani Koji
    • Assistant Professor, Graduate School of International Relations, International University of Japan
    • Ishii Hiromasa
    • Graduate Student, Faculty of Environment and Information Sciences, Yokohama National University
    • Matsuda Hiroyuki
    • Professor, Faculty of Environment and Information Sciences, Yokohama National University
    • Ikeda Tohru
    • Professor, Graduate School of Letters, Hokkaido University

抄録

We develop discrete-time models for analyzing the long run equilibrium outcomes on invasive species management in two-patch environments with migration. In particular, the focus is upon a situation where removal operations for invasive species are implemented only in one patch (controlled patch). The new features of the model are that (i) asymmetry in density dependent migration is considered, which may originate from impact of harvesting aswell as heterogeneous habitat conditions, and (ii) the effect of density-dependent catchability is well-taken to account for the nature that the required effort level to remove one individual may rise as the existing population decreases. The model is applied for agricultural damage control in the raccoon problem that has occurred in Hokkaido, Japan. Numerical illustrationsdemonstrate that the long run equilibrium outcomes highly depend on the degree ofasymmetry in migration as well as the sensitivity of catchability in response to a change in the population size of invasive species. Furthermore, we characterize the conditions under which the economically optimal effort levels are qualitatively affected by the above two factors and aiming at local extermination of invasive species in the controlled patch is justified.

収録刊行物

  • Economic analysis & policy series

    Economic analysis & policy series EAP09-1, 1-28, 2009-01

    国際大学

各種コード

  • NII論文ID(NAID)
    110006987672
  • NII書誌ID(NCID)
    AA12219099
  • 本文言語コード
    ENG
  • データ提供元
    NII-ELS 
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