Book Chapters
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 5,500 book chapters authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
Filter Total Items: 6063
Length of count period as a possible source of bias in estimating bird densities
No abstract available.
Authors
J. M. Scott, F.L. Ramsey
Metals and terrestrial earthworms (Annelida: Oligochaeta)
The toxicity of metals to earthworms and the residues of metals found in earthworms are reviewed. Meta 1 concentrations are rarely high enough to be toxic to worms, but copper may reduce populations in orchards heavily treated with fungicides and in soil contaminated with pig wastes. The metals in some industrial sewage sludges may interfere with using sludge in vermiculture. Storage ratios (the c
Authors
W. N. Beyer
Methods for determining the tolerance of fishes to environmental stressors
No abstract available.
Authors
Gary Wedemeyer, D. McLeay
Methods for keeping birds in captivity. [Panel discussion]
No abstract available.
Authors
W. Crawford, R. Sarson, Stanley N. Wiemeyer, G. Geddes, T. Dunstan
Methods of detecting and counting raptors: A review
Most raptors are wide-ranging, secretive, and occur at relatively low densities. These factors, in conjunction with the nocturnal activity of owls, cause the counting of raptors by most standard census and survey efforts to be very time consuming and expensive. This paper reviews the most common methods of detecting and counting raptors. It is hoped that it will be of use to the ever-increasing
Authors
M.R. Fuller, J. A. Mosher
Neoplasia and other disease problems in black-footed ferrets: Implications for an endangered species
No abstract available.
Authors
J. W. Carpenter, M.N. Novilla, H.E. Kaiser
Nutritionally-related diseases of captive-reared cranes and ratites
No abstract available.
Authors
J.A. Serafin
Parasitic infections of economic importance in fishes
No abstract available at this time
Authors
O.N. Bauer, S. Egusa, G. L. Hoffman
PCBs and organochlorine pesticides in wild mink and river otters from Oregon
Mink (Mustela vison) and river otters (Lutra canadensis) collected during the 1978-1979 trapping season in Oregon were analyzed for organochlorine pesticide and polychlorinated biphenyl (PCB) residues. PCB residues were most frequently encountered in both species from the Lower Columbia River. PCB residues in 6 of 9 Columbia River mink livers were as high as those reported in livers of experimenta
Authors
C. J. Henny, L. J. Blus, S.V. Gregory, C. J. Stafford