Theodore J. Weller

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Species identification is a fundamental prerequisite for successful ecological research and conservation yet can be difficult to achieve for morphologically cryptic species. Recent advances in molecular techniques have provided tools for investigating relatedness between outwardly similar species and identifying morphological characteristics to discriminate(More)
Fatalities of migratory bats, many of which use low frequency (<35 kHz; LowF) echolocation calls, have become a primary environmental concern associated with wind energy development. Accordingly, strategies to improve compatibility between wind energy development and conservation of bat populations are needed. We combined results of continuous echolocation(More)
Hawai‘i Cooperative Studies Unit (PACRC, UH Hilo), United States Geological Survey, Pacific Island Ecosystems Research Center, K ılauea Field Station, Hawai‘i National Park, Hawai‘i 96718, USA (PMG, ACM, CMT) United States Geological Survey, Pacific Island Ecosystems Research Center, K ılauea Field Station, Hawai‘i National Park, HI 96718, USA (FJB) Pacific(More)
Understanding habitat relationships; of forest dwelling bats has become a wildlife management priority during the past decade. We used radiotelemetry to examine the use of day roosts by fringed myotis (Myotis thysanodes) in a Douglas-fir (Pseudotsuga menziesii) forest in northern California. We located 52 roosts in 23 trees and compared the characteristics(More)
Determining the detailed movements of individual animals often requires them to carry tracking devices, but tracking broad-scale movement of small bats (<30 g) has been limited by transmitter technology and long-term attachment methods. This limitation inhibits our understanding of bat dispersal and migration, particularly in the context of emerging(More)
Understanding of migration in small bats has been constrained by limitations of techniques that were labor-intensive, provided coarse levels of resolution, or were limited to population-level inferences. Knowledge of movements and behaviors of individual bats have been unknowable because of limitations in size of tracking devices and methods to attach them(More)
Bats are known to roost in redwood forests year-round, but their activities outside the summer season are poorly understood. To improve understanding of the use of redwoods by resident and migrant bats, we conducted 74 mist net surveys between February 2008 and October 2010. Captures were dominated by Yuma myotis (M. yumanensis) in the summer and(More)
Standiford, Richard B.; Weller, Theodore J.; Piirto, Douglas D.; Stuart, John D., tech. coords. 2012. Proceedings of the coast redwood forests in a changing California: a symposium for scientists and managers. Gen. Tech. Rep. PSW-GTR-238. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station.
Little quantitative information exists about the survey effort necessary to inventory temperate bat species assemblages. We used a bootstrap resampling algorithm to estimate the number of mist net surveys required to capture individuals from 9 species at both study area and site levels using data collected in a forested watershed in northwestern California,(More)
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