Kotani, Koji and Ishii, Hiromasa and Matsuda, Hiroyuki and Tohru, Ikeda (2007): Invasive species management in two-patch environments: Agricultural damage control in the raccoon (procyon lotor) problem, Hokkaido, Japan. Published in: Population ecology , Vol. 51, No. 4 (2009): pp. 493-504.
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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 as well as heterogeneous habitat conditions, and (ii) the effect of density-dependent catchability is well-taken to account for the nature that 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 illustration demonstrates that the long run equilibrium outcomes highly depend on the degree of asymmetry 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 controlled patch is justified.
|Item Type:||MPRA Paper|
|Original Title:||Invasive species management in two-patch environments: Agricultural damage control in the raccoon (procyon lotor) problem, Hokkaido, Japan|
|Keywords:||catchability, meta-population, local extermination, removal effort, density dependent migration|
|Subjects:||N - Economic History > N5 - Agriculture, Natural Resources, Environment, and Extractive Industries|
|Depositing User:||Koji Kotani|
|Date Deposited:||23. Jun 2010 13:26|
|Last Modified:||16. Feb 2013 05:24|
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