A
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Not transported beyond limits of native range
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B
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Individuals transported beyond limits of native range, but not released in the wild
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C0
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Individuals released in the wild, but incapable of surviving for a significant period
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C1
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Individuals surviving in the wild in location where introduced, no reproduction
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C2
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Individuals surviving in the wild in location where introduced, reproduction occurring, but population not self-sustaining
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C3
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Individuals surviving in the wild in location where introduced, population self-sustaining
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D1
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Self-sustaining population in the wild, with individuals surviving a significant distance from the original point of introduction
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D2
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Self-sustaining population in the wild, with individuals surviving and reproducing a significant distance from the original point of introduction
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E
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Fully invasive, with individuals dispersing, surviving and reproducing at multiple sites across a significant spectrum of habitats
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