Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16783
Lethal mobilization of DDT by cowbirds
This study is an experimental demonstration of lethal mobilization of DDT by brown-headed cowbirds (Molothrus ater) and the effects of food deprivation on the distribution and loss of DDT, DDD, and DDE. The principal experimental group consisted of 20 birds fed a dietary dosage of 100 ppm of DDT for 13 days. After 2 days of full rations of untreated food, they were subjected to food restriction.
Authors
A.C. Van Velzen, W.B. Stiles, L. F. Stickel
The ecology of the Puerto Rican parrot, an endangered species
No abstract available.
Authors
C.B. Kepler
Residues of organochlorine pesticides, polychlorinated biphenyls, and mercury in bald eagle eggs and changes in shell thickness--1969 and 1970
Twenty-three bald eagle eggs collected in Alaska, Maine, Michigan, Minnesota, and Florida during 1969 and 1970 were analyzed for organochlorine pesticides, polychlorinated biphenyls, and mercury. All eggs contained residues of DDE, dieldrin, PCB's, and mercury. Average residue concentrations were lowest in eggs from Alaska. Significant eggshell thinning has occurred among eggs from most major a
Authors
Stanley N. Wiemeyer, B. M. Mulhern, F.J. Ligas, R.J. Hensel, J.E. Mathisen, F.C. Robards, S. Postupalsky
The distribution and ecology of the Puerto Rican whip-poor-will, an endangered species
No abstract available.
Authors
C.B. Kepler, A.K. Kepler
A bibliography of Oregon ornithology (1935-1970) with a cross-referenced list of the birds of Oregon
No abstract available.
Authors
J. M. Scott, T.W. Haislip, M. Thompson
Migration patterns and wintering localities of American ospreys
North American ospreys (Pandion haliaetus carolinensis), banded primarily in the Middle Atlantic States and in New England, apparently migrate to their winter grounds in the West Indies and South America on a broad front. Ospreys do not return to the United States as 1-year-olds, but an estimated 28 to 55 percent returrt to their natal vicinity (state where hatched or an adjacent state) as 2-year
Authors
C. J. Henny, W.T. Van Velzen
An appraisal of the winter bird-population study technique
No abstract available.
Authors
C.S. Robbins
Thirty-sixth breeding bird census. 6. Upland tulip tree-maple-oak forest
No abstract available.
Authors
C.S. Robbins
California condor survey, 1970
No abstract available.
Authors
R.D. Mallette, S.R. Wilbur, W.D. Carrier, J.C. Borneman