IMPACT OF A SARCOPTIC MANGE EPIDEMIC ON A POPULATION OF ENDANGERED SAN JOAQUIN KIT FOXES

Erica C Kelly; CSU Stanislaus, Endangered Species Recovery Program; ekelly@esrp.org; Brian L. Cypher, Jaime L. Rudd, Alyse D. Gabaldon, Tory L. Westall, Nicole A. Deatherage, Deana L. Clifford

Since 2015, we have conducted annual six-week systematic, citywide camera surveys during the summer in Bakersfield, CA to obtain population estimates and document the spatial spread of sarcoptic mange in endangered San Joaquin kit foxes (Vulpes macrotis mutica; SJKF). In 2019, we set up additional cameras in Taft, CA and have since included them in our yearly survey. We observed a 68% decline in Bakersfield SJKF camera detections between 2015 and 2020. Our lowest detections of SJKF were observed in 2020 with only 41 individuals, compared to 129 individuals in 2015. Similarly in Taft, we detected the lowest number of SJKF in 2020 at seven individuals compared to ten in 2019, although we only had one years’ worth of data prior. Mange detections have considerably decreased in the last 4 years for both Bakersfield and Taft, and the Bakersfield population has shown a steady increase from 2021-2024. However, Taft’s SJKF population fluctuates between 24 and 13 individuals respectively. While mange hadn’t been detected in either urban population since 2022, we recently documented six mange-infested individuals from Bakersfield in 2024. Based on fluctuating annual incidence rates along with previous epidemiological modeling, these finding suggest that sarcoptic mange has become endemic.

Poster Session