Loading…
Attending this event?
Welcome to the interactive web schedule for the 2018 Midwest Fish & Wildlife Conference! For tips on how to navigate this site, visit the "Helpful Info" section. To return to the main Conference website, go to: www.midwestfw.org.

View analytic
Tuesday, January 30 • 8:40am - 9:00am
SYMPOSIA-06: Impact of Snake Fungal Disease on Population Viability

Sign up or log in to save this to your schedule and see who's attending!

AUTHORS. Sarah Baker, Michael Dreslik, Christopher Phillips - Illinois Natural History Survey; Matthew Allender, University of Illinois College of Veterinary Medicine

ABSTRACT. Snake fungal disease (SFD) is an emerging fungal pathogen infecting both wild and captive snake species. The causative agent of SFD is Ophidiomyces ophiodiicola, a keratinophilic soil inhabiting fungus. Clinical signs of SFD include swelling, abnormal scales, and skin lesions. The last extant population of Eastern Massasauga Rattlesnakes (Sistrurus catenatus) in Illinois has an annual SFD prevalence rate of 15-22%, and evidence suggests mortality rates may be as high as 90%. Eastern Massasaugas were listed as federally threatened under the Endangered Species Act in 2016, and thus the impact of disease on the viability of wild populations is of great conservation concern. We used data from 15 years of demographic population monitoring and five years of SFD surveillance to conduct a population viability analysis (PVA). We used the Meta-Model Manager extension of Vortex PVA software to merge our demographic PVA model with the SFD disease dynamics model developed in the Vortex Outbreak extension. Our results show that SFD increases the probability of extinction of the Illinois population, and thus is likely a threat to the persistence of the species range-wide. 

Tuesday January 30, 2018 8:40am - 9:00am
101B

Attendees (4)