5 Year Species Review Owens Tui Chub Siphateles

5 -Year Species Review: Owens Tui Chub (Siphateles bicolor snyderi) Fish and Game Commission Meeting February 2021 Claire Ingel Fisheries Branch

Owens Tui Chub • CESA-listed endangered • Five isolated subpopulations remain within historic range • Inyo and Mono counties • Current habitats heavily managed and reliant upon ongoing human intervention

Representative Owens Tui Chub Habitats 3

Population Monitoring - Known Threats Monitoring Effort Responsible Agency Known threats Quarterly visual surveys CDFW and Bureau of Land Management Cattail encroachment Plugging of supply and outlet water pipes White Mountain Research Center (WRMC) Ponds Monthly checks WMRC Staff and CDFW Water Supply Owens Gorge Irregular distribution survey planned for Fall 2020 CDFW Unknown Population Mule Spring Hot Creek Headwaters Annual Visual Surveys CDFW Hybridization, vegetation removal, geothermal development Little Hot Creek Annual visual surveys. Population estimate planned for 2020 CDFW Inyo National Forest Drought, climate change

Threats • Hybridization with closely-related introduced Lahontan Tui Chub • Competition/predation from introduced species • Historic/ongoing loss of suitable habitats • Genetic factors (bottleneck, drift) • Water development • Climate change

Owens Tui Chub Findings and Recommendation • The Department finds that the conditions that presumably led to the listing of Owens Tui Chub are still present and additional threats have emerged since listing. • The Department recommends no change to the status of Owens Tui Chub on the list of California endangered species at this time.

Questions Thank You Claire Ingel Fisheries Branch Claire. Ingel@wildlife. ca. gov