Species that are considered uncertain risk need a more in-depth assessment beyond the Risk Summary to better define the species’ risk to U.S. environments.
The history of invasiveness for Silurus asotus is not documented. A successful introduction just outside of its native range was documented but there are no records on any actual impacts of that introduction. Information does exist regarding potential impacts of this species. The climate match is high. The highest match was in the upper Midwest with other areas of high match in the eastern two thirds of the country. The western third had an extremely low match. The certainty of assessment is medium. Information is missing regarding the history of invasiveness. The lack of a documented history of invasiveness precludes an overall assessment category of high even though the climate match is high. The overall risk assessment category is uncertain.
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Uncertain Risk
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