Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16782
A funding source for sandhill crane research: The Accelerated Research Program for Migratory Shore and Upland Game Birds
No abstract available.
Authors
R.A. Coon, T.J. Dwyer
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
Estimates of avian population trends from the North American Breeding Bird Survey
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 are accumulated over many years. Consequently, new methods of computing trends are needed. Several n
Authors
P.H. Geissler, B.R. Noon
Physiology of the eggshell thinning response to DDE
No abstract available.
Authors
S. Haseltine, T. Peterle, L. Nagode, A. Parsons, S. Lustick
Interpreting population estimates of birds following pesticide applications--behavior of male starlings exposed to an organophosphate pesticide
We determined activity budgets for 10 pairs of captive male Starlings between 7 May and 18 July 1980. Our objective was to quantify changes in behavior after exposure to an organophosphate (OP) pesticide and to assess the impact of changes in behavior on the interpretation of population estimates of birds following pesticide applications. We observed each pair of males for an hour at 07:30 and 09:
Authors
C. E. Grue, B.J. Shipley
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
Reducing bird count variability by training observers
No abstract available.
Authors
C.B. Kepler, J. M. Scott
Characterization of petroleum hydrocarbons in tissues of birds killed in the Amoco Cadiz 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.
Authors
G.C. Lawler, J.P. Holmes, D.M. Adamkiewicz, M.I. Shields, J. -Y. Monnat, J.L. Laseter
Effects of number of circular plots on estimates of avian density and species richness
No abstract available.
Authors
M.L. Morrison, R.W. Mannan, G.L. Dorsey