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27 September 2018 Late-Season Movement and Habitat Use by Oregon Spotted Frog (Rana pretiosa) in Oregon, USA
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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.

© 2018 by the American Society of Ichthyologists and Herpetologists
Christopher A. Pearl, Brome McCreary, Jennifer C. Rowe, and Michael J. Adams "Late-Season Movement and Habitat Use by Oregon Spotted Frog (Rana pretiosa) in Oregon, USA," Copeia 106(3), 539-549, (27 September 2018).
Received: 25 February 2018; Accepted: 23 August 2018; Published: 27 September 2018

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