Metals and terrestrial earthworms (Annelida: Oligochaeta)
W. N. Beyer
1981, Book chapter, Workshop on the Role of Earthworms in the Stabilization of Organic Residues, Proceedings, Volume 1.
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...
Estimates of avian population trends from the North American Breeding Bird Survey
P.H. Geissler, B.R. Noon
C. John Ralph, J. Michael Scott, editor(s)
1981, Book chapter, Estimating Numbers of Terrestrial Birds
One of the major purposes of bird population studies is to document changes in population size over a period of years. The traditional method used in Europe and North America to detect population change is to calculate annual ratios. However, this method can produce spurious results when ratios...
The North American Breeding Bird Survey
D. Bystrak
C. John Ralph, J. Michael Scott, editor(s)
1981, Book chapter, Estimating Numbers of Terrestrial Birds
A brief history of the North American Breeding Bird Survey (BBS) and a discussion of the technique are presented. The approximately 2000 random roadside routes conducted yearly during the breeding season throughout North America produce an enormous bank of data on distribution and abundance of breeding birds with great potential...
A funding source for sandhill crane research: The Accelerated Research Program for Migratory Shore and Upland Game Birds
R.A. Coon, T.J. Dwyer
J. C. Lewis, editor(s)
1981, Book chapter, Proceedings of the 1981 Crane Workshop
The role of captive propagation in preserving endangered species
J. W. Carpenter, S.R. Derrickson
Ron R. Odom, J.W. Guthrie, editor(s)
1981, Book chapter, Proceedings of the Nongame and Endangered Wildlife Symposium
[Comments on] 'A windshield and multivariate approach to the classification, inventory, and evaluation of wildlife habitat: An exploratory study,' by C.E. Grue, R.R. Reid, and N.J. Silvy
P.H. Geissler
David E. Capen, editor(s)
1981, Book chapter, The Use of Multivariate Statistics in Studies of Wildlife Habitat
Physiology of the eggshell thinning response to DDE
S. Haseltine, T. Peterle, L. Nagode, A. Parsons, S. Lustick
1981, Book chapter, XII Congress of the International Union of Game Biologists, 1975.
Discriminant analysis in wildlife research: Theory and applications
B. Kenneth Williams
D.E. Capen, editor(s)
1981, Book chapter, The Use of Multivariate Statistics in Studies of Wildlife Habitat
Discriminant analysis, a method of analyzing grouped multivariate data, is often used in ecological investigations. It has both a predictive and an explanatory function, the former aiming at classification of individuals of unknown group membership. The goal of the latter function is to exhibit group separation by means of linear...
Bird activity levels related to weather
C.S. Robbins
C. John Ralph, J. Michael Scott, editor(s)
1981, Book chapter, Estimating Numbers of Terrestrial Birds
The Breeding Bird Survey data bank serves as a primary source for studying effects of sky cover, wind speed, and temperature on bird census results. Other standardized methods, such as spot-mapping (Breeding Bird Census), point counts, banding, and the Winter Bird Survey, provide additional, but limited, means of assessing...
Effect of time of day on bird activity
C.S. Robbins
C. John Ralph, J. Michael Scott, editor(s)
1981, Book chapter, Estimating Numbers of Terrestrial Birds
Breeding season activity, based on detections recorded on more than a million 3. minute Breeding Bird Survey stops, reaches a peak for most species during the hour centered at sunrise or in the following hour. Activity of most species then declines gradually as the morning progresses. When large samples...
Polychlorinated biphenyls in a wild mink population
T. J. O'Shea, T. E. Kaiser, G.R. Askins, J.A. Chapman
Joseph A. Chapman, Duane Pursley, editor(s)
1981, Book chapter, Worldwide Furbearer Conference Proceedings: August 3-11, 1980, Frostburg, Maryland, USA
Techniques for sampling avian habitats
B.R. Noon
David E. Capen, editor(s)
1981, Book chapter, The use of multivariate statistics in studies of wildlife habitat
Characterization of petroleum hydrocarbons in tissues of birds killed in the Amoco Cadiz oil spill
G.C. Lawler, J.P. Holmes, D.M. Adamkiewicz, M.I. Shields, J. #NAME? Monnat, J.L. Laseter
1981, Book chapter, Proceedings of the International Symposium on the Amoco Cadiz: Fates and Effects of the Oil Spill
Results of the chemical analysis for petroleum hydrocarbons of muscle and liver tissue of several species of seabirds found washed ashore in the area affected by the Amoco Cadiz oil spill....
PCBs and organochlorine pesticides in wild mink and river otters from Oregon
Charles J. Henny, L. J. Blus, S.V. Gregory, C. J. Stafford
Joseph A. Chapman, Duane Pursley, editor(s)
1981, Book chapter, Worldwide Furbearer Conference Proceedings: August 3-11, 1980, Frostburg, Maryland, USA
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...
Length of count period as a possible source of bias in estimating bird densities
J. M. Scott, F. L. Ramsey
C. John Ralph, J. Michael Scott, editor(s)
1981, Book chapter, Estimating Numbers of Terrestrial Birds
Reappraisal of the Winter Bird-Population Study technique
C.S. Robbins
C. John Ralph, J. Michael Scott, editor(s)
1981, Book chapter, Estimating Numbers of Terrestrial Birds
Standardized morning and afternoon counts were conducted in two deciduous forest plots during seven winters. Morning counts yielded more species than afternoon counts, as well as higher counts of most species. A minimum of eight visits is recommended. Six visits yielded 2% to 5% fewer species, depending on the size...
The Puerto Rican parrot (Amazona vittata): Its decline and the program for its conservation
J. W. Wiley
Roger F. Pasquier, editor(s)
1981, Book chapter, Conservation of New World parrots: proceedings of the ICBP Parrot Working Group Meeting, St. Lucia, 1980
Saving the Newell's shearwater
J.L. Sincock
1981, Book chapter, Proceedings of the Hawaii Forestry Wildlife Conference: Moving Forestry and Wildlife into the '80's
Nutritionally-related diseases of captive-reared cranes and ratites
John A. Serafin
1981, Book chapter, Cornell Nutrition Conference for Feed Manufacturers Proceedings
Introductory Remarks: Species variability
C. B. Kepler
C. John Ralph, J. Michael Scott, editor(s)
1981, Book chapter, Estimating Numbers of Terrestrial Birds
Distance estimation as a variable in estimating bird numbers from vocalizations
J. M. Scott, F. L. Ramsey, C. B. Kepler
C. John Ralph, J. Michael Scott, editor(s)
1981, Book chapter, Estimating Numbers of Terrestrial Birds
Introduction
J. M. Scott, C.J. Ralph
C. John Ralph, J. Michael Scott, editor(s)
1981, Book chapter, Estimating Numbers of Terrestrial Birds
Analysis of bird survey data using a modification of Emlen's method
F. L. Ramsey, J. M. Scott
C. John Ralph, J. Michael Scott, editor(s)
1981, Book chapter, Estimating Numbers of Terrestrial Birds
Tests of hearing ability
F. L. Ramsey, J. M. Scott
C. John Ralph, J. Michael Scott, editor(s)
1981, Book chapter, Estimating Numbers of Terrestrial Birds
Reducing bird count variability by training observers
C. B. Kepler, J. M. Scott
C. John Ralph, J. Michael Scott, editor(s)
1981, Book chapter, Estimating Numbers of Terrestrial Birds
