Robert E Anthony
Robert Anthony is a Research Geophysicist in the Earthquake Hazards Program.
Science and Products
Filter Total Items: 61
DNA repair and resistance to UV-B radiation in western spotted frogs DNA repair and resistance to UV-B radiation in western spotted frogs
We assessed DNA repair and resistance to solar radiation in eggs of members of the western spotted frog complex (Rana pretiosa and R. luteiventris), species whose populations are suffering severe range reductions and declines. Specifically, we measured the activity of photoreactivating enzyme (photolyase) in oocytes of spotted frogs. In some species, photoreactivation is the most...
Authors
Andrew R. Blaustein, J.B. Hays, P.D. Hoffman, D.P. Chivers, Joseph M. Kiesecker, William P. Leonard, A. Marco, Deanna H. Olson, Jamie K Reaser, Robert G. Anthony
Effects of road management on movement and survival of Roosevelt elk Effects of road management on movement and survival of Roosevelt elk
Road closures frequently are used to manage for Rocky Mountain elk (Cervus elaphus nelsoni), but no studies have evaluated the effects of limited vehicle access on movements and survival of Roosevelt elk (C. elaphus roosevelti). We studied movements and survival of female Roosevelt elk before Road Management Areas (RMA) were designated, and during limited vehicular access from 1991 to...
Authors
Eric K. Cole, Michael D. Pope, Robert G. Anthony
Probable causes of nesting failures in Oregon's bald eagle population Probable causes of nesting failures in Oregon's bald eagle population
During the last 4 decades, numerous studies on a variety of raptor species have described breeding success and productivity, but few studies have reported the causes of nesting failures. Newton (1979:358) described causes of nesting failures for 6 species of raptors, but only 2 of these species (bald eagle [Haliaeetus leucocephalus], prairie falcon [Falco mexicanus]) inhabit North...
Authors
Robert G. Anthony, Richard W. Frenzel, Frank B. Isaacs, Monte G. Garrett
Environmental contaminants in bald eagles in the Columbia River Estuary Environmental contaminants in bald eagles in the Columbia River Estuary
Eggs, blood, and carcasses of bald eagles (Haliaeetus leucocephalus) and fish were collected and breeding success of eagles was monitored in the Columbia River estuary, 1980-87, to determine if contaminants were having an effect on productivity. High levels of dichloro diphenyl dichloroethylene (DDE), polychlorinated biphenyls (PCB's), and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) were...
Authors
Robert G. Anthony, Monte G. Garrett, Carol Schuler
Selenium in wetlands and waterfowl foods at Kesterson Reservoir, California, 1984 Selenium in wetlands and waterfowl foods at Kesterson Reservoir, California, 1984
Kesterson Reservoir (Kesterson) received subsurface agricultural drainwater containing high levels of salts and selenium from farmland in the San Joaquin Valley of California. The accumulation of selenium in wetlands and waterfowl foods at Kesterson was investigated during May, August, and December of 1984. High concentrations of selenium were found in water, sediments, terrestrial and...
Authors
Carol Schuler, Robert G. Anthony, Harry M. Ohlendorf
Environmental contaminants in blood of western bald eagles Environmental contaminants in blood of western bald eagles
Authors
Stanley N. Wiemeyer, Richard W. Frenzel, Robert G. Anthony, B.R. McClelland, Richard L. Knight
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 61
DNA repair and resistance to UV-B radiation in western spotted frogs DNA repair and resistance to UV-B radiation in western spotted frogs
We assessed DNA repair and resistance to solar radiation in eggs of members of the western spotted frog complex (Rana pretiosa and R. luteiventris), species whose populations are suffering severe range reductions and declines. Specifically, we measured the activity of photoreactivating enzyme (photolyase) in oocytes of spotted frogs. In some species, photoreactivation is the most...
Authors
Andrew R. Blaustein, J.B. Hays, P.D. Hoffman, D.P. Chivers, Joseph M. Kiesecker, William P. Leonard, A. Marco, Deanna H. Olson, Jamie K Reaser, Robert G. Anthony
Effects of road management on movement and survival of Roosevelt elk Effects of road management on movement and survival of Roosevelt elk
Road closures frequently are used to manage for Rocky Mountain elk (Cervus elaphus nelsoni), but no studies have evaluated the effects of limited vehicle access on movements and survival of Roosevelt elk (C. elaphus roosevelti). We studied movements and survival of female Roosevelt elk before Road Management Areas (RMA) were designated, and during limited vehicular access from 1991 to...
Authors
Eric K. Cole, Michael D. Pope, Robert G. Anthony
Probable causes of nesting failures in Oregon's bald eagle population Probable causes of nesting failures in Oregon's bald eagle population
During the last 4 decades, numerous studies on a variety of raptor species have described breeding success and productivity, but few studies have reported the causes of nesting failures. Newton (1979:358) described causes of nesting failures for 6 species of raptors, but only 2 of these species (bald eagle [Haliaeetus leucocephalus], prairie falcon [Falco mexicanus]) inhabit North...
Authors
Robert G. Anthony, Richard W. Frenzel, Frank B. Isaacs, Monte G. Garrett
Environmental contaminants in bald eagles in the Columbia River Estuary Environmental contaminants in bald eagles in the Columbia River Estuary
Eggs, blood, and carcasses of bald eagles (Haliaeetus leucocephalus) and fish were collected and breeding success of eagles was monitored in the Columbia River estuary, 1980-87, to determine if contaminants were having an effect on productivity. High levels of dichloro diphenyl dichloroethylene (DDE), polychlorinated biphenyls (PCB's), and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) were...
Authors
Robert G. Anthony, Monte G. Garrett, Carol Schuler
Selenium in wetlands and waterfowl foods at Kesterson Reservoir, California, 1984 Selenium in wetlands and waterfowl foods at Kesterson Reservoir, California, 1984
Kesterson Reservoir (Kesterson) received subsurface agricultural drainwater containing high levels of salts and selenium from farmland in the San Joaquin Valley of California. The accumulation of selenium in wetlands and waterfowl foods at Kesterson was investigated during May, August, and December of 1984. High concentrations of selenium were found in water, sediments, terrestrial and...
Authors
Carol Schuler, Robert G. Anthony, Harry M. Ohlendorf
Environmental contaminants in blood of western bald eagles Environmental contaminants in blood of western bald eagles
Authors
Stanley N. Wiemeyer, Richard W. Frenzel, Robert G. Anthony, B.R. McClelland, Richard L. Knight
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.