Journal
BIOLOGICAL INVASIONS
Volume 10, Issue 8, Pages 1277-1287Publisher
SPRINGER
DOI: 10.1007/s10530-007-9202-1
Keywords
Aedes; Biological control; Culex; Geographical Information Systems (GIS); Introduced fishes; Invasive species; Non-indigenous species; Qualitative risk assessment; Relative risk assessment; Risk analysis
Categories
Funding
- US Armed Forces Pest Management Board's Deployed War Fighter Protection Program
- Montana State University
- Montana Agricultural Experiment Station, Bozeman, Montana, USA
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Qualitative risk assessment methodologies were used to assess the risk of establishment and consequent impacts on native minnows and species of concern (SOC) associated with the intentional or unintentional introduction of the mosquito biological control agent, Gambusia affinis, to various Montana watersheds. Gambusia affinis introductions for mosquito control have been made throughout the world; some introductions have resulted in deleterious effects on native species. We used average January water temperatures, the presence of dams, and the presence of native minnows and SOC to define endpoints for our assessment. Our results suggest that a section of the Missouri River running between Wolf Creek and Landusky had the highest overall risk score, which corresponds to the highest likelihood of establishment and effects on native minnows and SOC. We also demonstrate how rivers with the highest temperatures are not necessarily at the highest risk of having deleterious effects on minnows and SOC; conversely, these rivers were found to be at highest risk of a population of G. affinis establishing.
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