New records of the non-native virile crayfish Faxonius virilis (Hagen, 1870) from the upper Snake River drainage and northern Bonneville Basin of the western United States

Publication Type:

Journal Article

Authors:

Larson, Eric R.; Egly, Rachel M.; Williams, Bronwyn W.

Source:

BioInvasions Records, Volume 7, Issue 2, p.7 p. (2018)

Call Number:

A18LAR01IDUS

Keywords:

Bonneville Basin, Faxonius virilis, non-native virile crayfish, pilose crayfish, Snake River

Abstract:

This report documents observations of the non-native virile crayfish, Faxonius virilis, from the upper Snake River drainage and northern Bonneville Basin of the western United States. The researchers sampled 162 sites for crayfish during the summers of 2016 and 2017, detecting F. virilis at 22 of these sites, which ranged from small streams to wadeable rivers, as well as artificial reservoirs and a large natural lake (Bear Lake, Idaho and Utah). They report the first records for F. virilis from the large, mainstem Snake River. However, they did not find F. virilis in the Snake River headwaters of western Wyoming, and detections of this species were few in the Snake River drainage below Shoshone Falls in south central Idaho. The investigators also found no F. virilis in eastern Oregon.