2014 Seminar Series - USGS EcoLunch
Date: April 29th
Time: 12:00 pm MDT
Speaker: Megan Layhee, USGS Fisheries Biologist
Title: Spread and occupancy of introduced American bullfrog (Lithobates catesbeianus) in Yellowstone River floodplain.
Abstract: The American bullfrog is a globally distributed invasive species that was recently introduced to the Yellowstone River floodplain near Billings. We conducted multi-season surveys in June - August 2012 and 2013 at 97-102 sites and used Montana Natural Heritage Program's 2010 baseline surveys to depict bullfrog distribution and spread, and used occupancy models to assess environmental features related to their spread. Our surveys demonstrate that bullfrogs are increasing their range- since 2010 have spread 12 km upstream and 34 km downstream, we also found a 6-7 fold increase in number of breeding sites from 2012 to 2013, and finally, our top models relate bullfrog occupancy to permanent waterbodies and human-mediated introduction.
Location: First Floor Conference Room "Madison Room"- NOROCK, 2327 University Way, Suite 2
(Click HERE for directions)
Webinar Info: If you can not attend in person, you can still listen and watch from afar!
Access code: 294333#
April 29: Megan Layhee, USGS - Spread and occupancy of introduced American bullfrog (Lithobates catesbeianus) in Yellowstone River floodplain
May 13: Bahram Farokhkish, USGS - Yellowstone Lake Trout Telemetry Project
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USGS EcoLunch is a forum for students, researchers, visiting scientists and collaborators in the environmental sciences to present their current and past work. Presentations will range from brown bag discussions of ongoing projects to more formal and polished seminar presentations.