Ecological Risk Screening Summary - Yellow Perch (Perca flavescens) - High Risk

Species that are considered high risk have a well-documented history of invasiveness in at least one location globally, and a high or medium climate match to the contiguous United States.

Yellow Perch (Perca flavescens) is a freshwater fish native to much of the eastern United States and Canada. It is one of the most popular sport fishes, sustaining a recreational fishery with economic value in excess of $100,000. There are also commercial fisheries for this species in the Great Lakes with the fishery in Canada estimated at $16 million CAD. P. flavescens can be a host for three OIE-reportable diseases: viral haemorrhagic septicaemia, spring viraemia of carp virus, and infectious heamatopoietic necrosis. It is also a host for many other parasites and pathogens. The history of invasiveness for P. flavescens is high. There are records of introduction resulting in established populations outside of the native range in Canada and the United States. Its import into Japan, where there has been an introduction but no establishment, is regulated. Where nonnative populations have established, P. flavescens has been shown to have an impact on the community structure structure
Something temporarily or permanently constructed, built, or placed; and constructed of natural or manufactured parts including, but not limited to, a building, shed, cabin, porch, bridge, walkway, stair steps, sign, landing, platform, dock, rack, fence, telecommunication device, antennae, fish cleaning table, satellite dish/mount, or well head.

Learn more about structure of zooplankton. These changes have, in some cases, led to significant reductions in native fish species. They also eat chinook smolts. The climate match is high. Almost the entire contiguous United States had a high match with only a few small areas having a medium match. The certainty of assessment is high. The overall risk assessment is high.