Late-season movement and habitat use by Oregon spotted frogs (Rana pretiosa) in Oregon, USA

By: , and 



Many amphibians use multiple habitats across seasons. Information on seasonal habitat use, movement between seasonal habitat types, and habitats that may be particularly valuable is important to conservation and management. We used radio-telemetry to study late-season movement and habitat use by Oregon Spotted Frog (Rana pretiosa) at nine sites from four populations along the Cascade Mountains in Oregon. Movement rates declined with date and were the lowest at the end of tracking in December and January. Frogs across our sites used vegetated shallows in late summer and early fall. In fall, frogs used a range of habitat types, and at several sites moved to distinctive habitats such as springs, interstices in lava rock, and semi-terrestrial beaver channels. Distance between first and last tracking location was <250 m for 84.5% (49/58) of frogs, ranged up to 1145 m, and was greater for frogs in ditch habitats than those not in ditches. Distinctive features like springs or semi-terrestrial retreats can host multiple frogs and may represent particularly valuable wintering habitat for R. pretiosa in some sites in their Oregon range.

Publication type Article
Publication Subtype Journal Article
Title Late-season movement and habitat use by Oregon spotted frogs (Rana pretiosa) in Oregon, USA
Series title Copeia
DOI 10.1643/CH-18-031
Volume 106
Issue 3
Year Published 2018
Language English
Publisher The American Society of Ichthyologists and Herpetologists
Contributing office(s) Forest and Rangeland Ecosystem Science Center
Description 11 p.
First page 539
Last page 549
Country United States
State Oregon
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