Allocating biosecurity resources between preventing, detecting, and eradicating island invasions

Rout, Tracy M., Moore, Joslin L., Possingham, Hugh P. and McCarthy, Michael A. (2011) Allocating biosecurity resources between preventing, detecting, and eradicating island invasions. Ecological Economics, 71 1: 54-62. doi:10.1016/j.ecolecon.2011.09.009


Author Rout, Tracy M.
Moore, Joslin L.
Possingham, Hugh P.
McCarthy, Michael A.
Title Allocating biosecurity resources between preventing, detecting, and eradicating island invasions
Journal name Ecological Economics   Check publisher's open access policy
ISSN 0921-8009
1873-6106
Publication date 2011-11-15
Sub-type Article (original research)
DOI 10.1016/j.ecolecon.2011.09.009
Volume 71
Issue 1
Start page 54
End page 62
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2012
Language eng
Formatted abstract Finding efficient ways to manage the threat of invasive species helps make the most of limited resources. Different management actions reduce the impact of invasions differently: preventing invasion eliminates impacts entirely, surveillance can facilitate early detection and eradication, and removing individuals can reduce future impact. Few studies have examined the trade-off between all three facets of invasion management. Using a simple model of island invasion, we find how resources should be allocated to each action to minimise the total cost of management and impact. We use a case study of black rat (Rattus rattus) invasion on Barrow Island, Western Australia. The optimal amount to invest in each management action depends on the effectiveness of each action, and the magnitude of impact caused by different stages of invasion. If the pest is currently absent, it is more cost-effective to prevent impacts through prevention or surveillance. If the pest is already widespread, it can sometimes be cost-effective to give up rather than attempting eradication. This model of invasion can provide useful decision support by identifying the trade-offs inherent in each candidate management strategy, the thresholds that alter optimal strategies, and the parameters for which we need more information.
Keyword Decision theory
Exotic species
Introduced species
Invasion management
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Biological Sciences Publications
 
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