Cooperative Research Units
Education, Research And Technical Assistance For Managing Our Natural Resources
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Population monitoring of the Oregon Slender Salamander


January 2011 - December 2013


The Oregon Slender Salamander (Batrachoseps wrighti) is a forest-associated species geographically restricted to the Oregon Cascade Mountains. It has been strongly associated with late-successional forest and decaying down wood, and is considered "sensitive" throughout it's range. This species is small and sedentary, which likely makes them susceptible to timber harvest practices that would require individuals to relocate. Unfortunately much basic information on this species is lacking because of their cryptic behavior and difficulting detecting them with typical amphibian surveys, which also tend to destroy downed wood habitat. The objectives of this study are to design and implement surveys to determine occupancy and if possible population size, using techniques that do not negatively impact their habitat. We will also attempt to increase our understanding of this species' habitat needs and their response to forest management activities.

Research Products and Activities

Peer Reviewed Publications

  • Kroll, A.J., T.S. Garcia, J. Jones, K.M. Dugger, B. Murden, J. Johnson, S. Peterman, B. Brintz, and M. Rochelle. 2015. Evaluating Multi-level Models to Assess Occupancy State Responses of Plethodontid Salamanders. PLoS ONE 10(11):
    e0142903. doi:10.1371/journal.pone.0142903.


  • Garcia, TS, KM Dugger, B Nickerson, J Johnson, M Rochelle, and AJ Kroll. 2011. Estimating occupancy and population size for the Oregon Slender Salamander (Batrachoseps wrighti) in the western Cascade Mountain range. Joint meeting of the Society for Northwest Vertebrate Biologists and the Washington Chapter of The Wildlife Society, Gig Harbor, Washington, March 23-25, 2011.
  • Garcia, T.S., K.M. Dugger, J.Johnson, M. Rochelle, and A.J. Kroll. 2012. A novel approach for estimating occupancy of the Oregon slender salamander (Batrachoseps wrighti). The Wildlife Society Annual Conference, Portland Oregon, October 13-18, 2012.

Current Staff

Federal Staff: 95

Masters Students: 240

Phd Students: 143

Post Docs: 52

University Staff: 245

5 Year Summary

Students graduated: 702

Scientific Publications: 1948

Presentations: 4253



Funding Agencies

  • ODFW Conservation Strategy Implementation Grant
  • Weyerhaueser Company


Cooperative Research Units Program Headquarters Cooperators

  1. U.S. Geological Survey