Ecological Risk Screening Summary - Sacramento Pikeminnow (Ptychocheilus grandis)

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.

Ptychocheilus grandis, Sacramento Pikeminnow, is a freshwater fish that is native to central and northern California. It has been introduced outside of its native range in California, such as in the Eel River basin and along the central California coast, where it has become established. This species is a large, slow-growing carnivorous cyprinid. It reduces native fish abundance and alters habitat use by native fish in areas where it has been introduced. The History of Invasiveness for
P. grandis is classified as High due to multiple well-documented, scientifically-credible negative impacts of its introduction. The climate matching analysis for the contiguous United States indicates establishment concern for this species outside its native range. The climate match was medium to high across the western half of the United States. The Certainty of Assessment for this ERSS is classified as High due to abundant high-quality information documenting impacts of introduction of this species. The Overall Risk Assessment Category for Ptychocheilus grandis in the contiguous United States is High.