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Biological Control (Physical Control (Properties (This may include the…
Biological Control
Physical Control
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Properties
This may include the installation of barriers and fences or the removal of habitat by excavation or trimming
Population numbers may be reduced by hunting, trapping and culling, although these methods are labour intensive
Physical methods to contain invasive species are not usually species specific and can also impede endemic wildlife
Chemical Control
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Properties
Chemical agents may include herbicides (for plants), pesticides (for insects) or other compounds (e.g. rat poison)
Chemical agents may have moderate specificity, but can also detrimentally affect local wildlife and are costly to employ
The effect of chemical agents may become more pronounced in higher trophic levels due to biomagnification
Biological Control
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Properties
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Biological agents must be carefully assessed before release to ensure they do not become invasive themselves
Examples of agents include the Vedalia beetle (feeds on citrus plant invertebrates) and the myxoma virus (infects rabbits)
Biological control agents must be monitored for unintended side effects (e.g. development of immunity in invasive species)
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