Publications
Below is a list of WERC's peer-reviewed publications. If you are searching for a specific publication and cannot find it in this list, please contact werc_web@usgs.gov
Filter Total Items: 3723
Predation: Hyla cadaverina Predation: Hyla cadaverina
No abstract available.
Authors
E.L. Ervin, Robert N. Fisher, K. Madden
Investigation of the biological impact of TCE and PCE on wild rodent and reptile populations, Edwards Air Force Base, CA. Field Activity at IRP Sites 25, 37, 133, and corresponding reference areas. 2000 Progress Report to Edwards Air Force Base Investigation of the biological impact of TCE and PCE on wild rodent and reptile populations, Edwards Air Force Base, CA. Field Activity at IRP Sites 25, 37, 133, and corresponding reference areas. 2000 Progress Report to Edwards Air Force Base
No abstract available at this time
Authors
A.K. Miles, S.E. Spring
Status of translocated sea otters at San Nicolas Island, California Status of translocated sea otters at San Nicolas Island, California
In the 1970s about 1,650 southern sea otters (Enhydra lutris nereis) were restricted to the central California coast (Riedman and Estes, 1990), and a high volume of oil was being shipped through the region. Because of the vulnerability of sea otters to contamination from oil (Costa and Kooyman, 1982; Williams and Davis, 1995) that would likely spread wide- ly along the shore after a...
Authors
Galen B. Rathbun, Brian B. Hatfield, Thomas G. Murphey
Cryptic genetic variation and paraphyly in ravens Cryptic genetic variation and paraphyly in ravens
Widespread species that are morphologically uniform may be likely to harbour cryptic genetic variation. Common ravens (Corvus corax) have an extensive range covering nearly the entire Northern Hemisphere, but show little discrete phenotypic variation. We obtained tissue samples from throughout much of this range and collected mitochondrial sequence and nuclear microsatellite data. Our...
Authors
K.E. Omland, C.L. Tarr, W.I. Boarman, J.M. Marzluff, R.C. Fleischer
Tidal influence on spatial dynamics of leopard sharks, Triakis semifasciata, in Tomales Bay, California Tidal influence on spatial dynamics of leopard sharks, Triakis semifasciata, in Tomales Bay, California
We used ultrasonic telemetry to determine the movement directions and movement rates of leopard sharks, Triakis semifasciata, in Tomales Bay, California. To analyze tide and time of day effects, we surgically implanted transmitters in the peritoneal cavities of one male and five female leopard sharks, which we located during summer for three to five sampling sessions lasting 12 to 24 h...
Authors
Joshua T. Ackerman, Matthew C. Kondratieff, Scott A. Matern, Joseph J. Cech
Experimental evaluation of the effect of mechanical wing decoys ('moto-duck') on hunting success and waterfowl response in California, 1999-2000 Experimental evaluation of the effect of mechanical wing decoys ('moto-duck') on hunting success and waterfowl response in California, 1999-2000
No abstract available at this time
Authors
J.M. Eadie, T.G. Moore, Joshua T. Ackerman
Root growth and function of three Mojave Desert grasses in response to elevated atmospheric CO2 concentration Root growth and function of three Mojave Desert grasses in response to elevated atmospheric CO2 concentration
Root growth and physiological responses to elevated CO2 were investigated for three important Mojave Desert grasses: the C3 perennial Achnatherum hymenoides, the C4 perennial Pleuraphis rigida and the C3 annual Bromus madritensis ssp. rubens. Seeds of each species were grown at ambient (360 μl l−1) or elevated (1000 μl l−1) CO2 in a glasshouse and harvested at three phenological stages...
Authors
C.K. Yoder, P. Vivin, L.A. DeFalco, J.R. Seemann, R.S. Nowak
Conservation of freshwater turtles Conservation of freshwater turtles
No abstract available.
Authors
V.J. Burke, J.E. Lovich, J.W. Gibbons
Using presence of sign to measure habitats used by Roosevelt elk Using presence of sign to measure habitats used by Roosevelt elk
tract Radiotelemetry and pellet-group surveys are methods used commonly to measure habi- tat use by large ungulates. However, telemetry can be expensive and analysis of data col- lected from pellet-group surveys is restricted to rank analysis. We explored the feasibil- ity of recording the presence of Roosevelt elk (Cervus elaphus roosevelti) sign to identify habitats used by elk. We...
Authors
Floyd W. Weckerly, Mark A. Ricca