Short-term occupancy and abundance dynamics of the Oregon spotted frog (Rana pretiosa) across its core range

Open-File Report 2014-1230
Prepared in cooperation with the Interagency Special Status / Sensitive Species Program (ISSSSP). The ISSSSP is a cooperative program of the Pacific Northwest Regional Office of the U.S. Forest Service and Oregon/Washington State Office of the Bureau of Land Management
By: , and 

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Abstract

The Oregon spotted frog (Rana pretiosa) occupies only a fraction of its original range and is listed as Threatened under the Endangered Species Act. We surveyed 93 sites in a rotating frame design (2010–13) in the Klamath and Deschutes Basins, Oregon, which encompass most of the species’ core extant range. Oregon spotted frogs are declining in abundance and probability of site occupancy. We did not find an association between the probability that Oregon spotted frogs disappear from a site (local extinction) and any of the variables hypothesized to affect Oregon spotted frog occupancy. This 4-year study provides baseline data, but the 4-year period was too short to draw firm conclusions. Further study is essential to understand how habitat changes and management practices relate to the status and trends of this species.

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Short-term occupancy and abundance dynamics of the Oregon spotted frog (Rana pretiosa) across its core range
Series title Open-File Report
Series number 2014-1230
DOI 10.3133/ofr20141230
Year Published 2014
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Forest and Rangeland Ecosystem Science Center
Description iv, 10 p.
Country United States
State Oregon
Online Only (Y/N) Y
Additional Online Files (Y/N) N