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Exotic/Nuisance/Overabundant Wildlife. Animal damage control (ADC) . Exotic Species . All species have an ecological niche They evolve to occupy a “realized” niche counteradaptation - e.g., when predator evolves to be effecient at prey capture, prey evolve to avoid predator .

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Exotic/Nuisance/Overabundant Wildlife

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Exotic nuisance overabundant wildlife l.jpg

Exotic/Nuisance/Overabundant Wildlife

  • Animal damage control (ADC)


Exotic species l.jpg

Exotic Species

  • All species have an ecological niche

  • They evolve to occupy a “realized” niche

    • counteradaptation - e.g., when predator evolves to be effecient at prey capture, prey evolve to avoid predator


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Result is a narrow realized niche

  • Transporting such species to a new location removes the counteradaptive constraints

  • 1. Escape from competition

  • 2. Escape from predators, disease


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How are exotic species introduced?

  • 1. Inadvertent

    • weeds

    • rats

  • 2. Escape of domestics

    • plants

    • burros

    • cats and dogs

  • 3. Purposeful

    • to fill an open niche?

      • Ring-necked pheasant

    • as predators to control exotic prey

    • mongoose


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In the U.S.

  • Red fox, starling, mute swan, nutria, mountain goats (native to western Canada, Alaska, and parts of NW U.S., otherwise introduced)


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Biological control:

  • Not eradication but reduction of numbers of the exotic pest

  • Can use native predators, competitors, diseases

  • Can use pesticides to target the exotic species with minimal effect on natives

  • "Classical" biological control involves introduction of exotic predators or diseases:

    • red fox in Australia

    • mongoose in Puerto Rico

  • strict laws to prevent entry


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