Publications
This list of publications includes peer-review journal articles, official USGS publications series, reports and more authored by scientists in the Ecosystems Mission Area. A database of all USGS publications, with advanced search features, can be accessed at the USGS Publications Warehouse.
Filter Total Items: 41920
Organochlorine residues and reproduction in the big brown bat
Twenty-six pregnant big brown bats (Eptesicus fuscus) were collected at Montpelier Barn, Laurel, Maryland, and kept in individual cages until parturition. Seven young in 5 litters were born dead; 21 litters contained only living young. Polychlorinated bipbenyl (PCB, Aroclor 1260) crossed the placenta two to three times more readily than did DDE. Concentrations of PCB were significantly greater
Authors
D. R. Clark, T. G. Lamont
Organochlorine residues in three bat species from four localities in Maryland and West Virginia, 1973
In 1973, 119 bats of three species were collected from four localities in Maryland and West Virginia. The collection included 43 big brown bats (Eptesicus fuscus), 43 little brown brown bats (Myotis lucifugus), and 33 eastern pipistrelles (Pipistrellus subflavus). The bats were collected from Round Top Mountain, Washington Co., Md.; Trout Cave, Pendleton Co., W. Va.; Montpelier Barn, Prince George
Authors
D. R. Clark, R. M. Prouty
Establishment of the black-tailed jackrabbit on the Virginia eastern shore
No abstract available.
Authors
R. B. Clapp, J.S. Weske, T.C. Clapp
The seventy-sixth Audubon Christmas bird count. Delaware, Maryland, D.C., Virginia
No abstract available.
Authors
D. Bystrak
Canine tooth wear in captive big brown bats (Eptesicus fuscus)
No abstract available.
Authors
D. R. Clark
Dynamics of storage of organochlorine pollutants in herring gulls
Several organochlorine pollutants were studied over the period of one annual cycle in caged juvenile and wild-collected adult herring gulls (Lagus argentatus) from Lake Michigan. Fish, mostly alewives (Alosa pseudoharengus), comprised the major year-round food items in the wild; alewives were also fed to the caged juveniles. Fish residues averaged around 3 mg/kg of p,p'-DDE, 2 mg/kg p,p'DDT + p,p'
Authors
D. W. Anderson, J.J. Hickey
Acute oral toxicity and tissue residues of thallium sulfate in golden eagles, Aquila chrysaetos
No abstract available.
Authors
J. R. Bean, R. H. Hudson
Determining population size of territorial red-winged blackbirds
Population sizes of territorial male red-winged blackbirds (Agelaius phoeniceus) were determined with counts of territorial males (area count) and a Petersen-Lincoln Index method for roadsides (roadside estimate). Weather conditions and time of day did not influence either method. Combined roadside estimates had smaller error bounds than the individual transect estimates and were not hindered by
Authors
P.H. Albers
Fatal vaccine-induced canine distemper virus infection in black-footed ferrets
Four black-footed ferrets that were live-trapped in South Dakota and transported to the Patuxent Wildlife Research Center died within 21 days after vaccination with modified live canine distemper virus. Immunofluorescence, European ferret inoculation, virus isolation attempts, and serum-neutralization tests indicated insufficient attenuation of the vaccine for this species.
Authors
J. W. Carpenter, M.J.G. Appel, R.C. Erickson, M.N. Novilla