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. This additional information will help inform decisions on where, when, and how the species may be used to minimize risks of them becoming invasive.
Coregonus oxyrinchus is a fresh- and brackish water whitefish species native to northern Europe. It is not known to enter marine waters. This species has seen a severe decrease in its populations due to habitat loss and pollution. Some (Freyhof and Schöter 2005) assert that this species is extinct. Others claim it is critically endangered, and stocking programs have been established to reintroduce it to rivers in its historical native range. Populations of C. oxyrinchus have been introduced to Germany and Denmark and have established there, but since this is part of the species’ native range, it has no documented history of invasiveness. C. oxyrinchus has a low climate match with the United States. Certainty of this assessment is low due to uncertainty concerning the status of its population. Overall risk assessment category is uncertain.
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Uncertain Risk
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