CONSERVATION EFFORTS FOR THE CALIFORNIA RED-LEGGED FROG (RANA DRAYTONII) IN YOSEMITE NATIONAL PARK.
Robert L. Grasso; Yosemite National Park; 5083 Foresta Road, El Portal , CA, 95318; (209) 379-1438; rob_grasso@nps.gov; Jessie Bushell, Colleen D. Kamoroff, Rachel Mazur
Yosemite NP Session Presentation by Rob Grasso on CA red-legged frog The federally threatened California red-legged frog (Rana daytonii) is perhaps restricted to less than 10 sites remaining in the Sierra Nevada. After successful eradication of the invasive American bullfrog (Rana catesbeianus), the red-legged frog was introduced to Yosemite Valley starting in 2016 in an effort to re-establish a large population stronghold in a significant area of its former range. In partnership with the San Francisco Zoo and the Yosemite Conservancy the park is planning to release close to 1,000 adult frogs in Yosemite Valley by the end of 2020. The park will provide a historical overview for the project as well as an update on status of the introductions to date. An update to the ongoing effort to remove bullfrogs from two historically occupied red-legged frog habitats (Swamp Lake & Gravel Pit Lake) in Yosemite's wilderness will also be provided as well the long-term strategy for reintroducing the red-legged frog into these sites.
Yosemite Restoration I