Ecological Risk Screening Summary - Amur Sleeper (Perccottus glenii) - High Risk

Species that are considered high risk have a well-documented history of invasiveness in at least one location globally and are of establishment concern for the contiguous United States based on a climate matching analysis.

Perccottus glenii, the Amur Sleeper, is a fish species native to the Amur River Basin and surrounding areas in China, North Korea, and Russia. It is a hardy species capable of tolerating low dissolved oxygen content and a large temperature range, including freezing conditions. Perccottus glenii is used as a bait fish and may be kept in aquaria. P. glenii is listed as an injurious wildlife species in the United States under the Lacey Act and several U.S. states have regulations regarding the species. The History of Invasiveness for Perccottus glenii is classified as High due to successful establishment of many nonnative populations and documented negative impacts of introduction. Nonnative populations of this species have been associated with declines in invertebrate and vertebrate species richness and abundance. The climate matching analysis for the contiguous United States indicates establishment concern for this species. The climate match for Perccottus glenii was medium to high throughout the contiguous United States except for areas of low match west of the Rocky Mountains, along the Gulf Coast, and in peninsular Florida. The area of highest climate match was the Great Lakes Basin. The Certainty of Assessment for this ERSS is classified as High due to ample evidence of nonnative establishment and documentation of negative impacts of introduction. The Overall Risk Assessment Category for Perccottus glenii in the contiguous United States is High.