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 climate match is extremely high, with medium and high matches covering much of the continental US. However, although L. idus has been introduced to many locations in the US, it is not thought to be established in most of them, indicating a low ability to invade new territories. L. idus is related to the highly-invasive European carp (Cyprinus carpio), but adverse impacts related to its introduction have yet to be demonstrated. L. idus is susceptible to spring viraemia of carp virus (SVCV), which is an OIE-reportable disease. L. idus thus presents high overall risk to waters with no history of SVCV because of the large number of fish species susceptible to this disease. For waters already exposed to SVCV, the amount of confusion surrounding this species establishment and impacts in the US leads to an uncertain overall risk.
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Uncertain Risk
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