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: 41778
Reproduction and residue accumulation in black ducks fed toxaphene
Three sets of 15 pairs of black ducks (Anas rubripes) were given 0, 10, or 50 ppm toxaphene in a dry mash diet for a period of 19 months, which included two breeding seasons. Survival of adults was not affected, but the weights of treated males were depressed during the summer months. Egg production, fertility, hatchability, eggshell thickness, growth, and survival of young did not vary with toxap
Authors
S. D. Haseltine, M. T. Finley, E. Cromartie
Aroclor 1242 and reproductive success of adult mallards (Anas platyrhynchos)
Twenty-four pairs of adult mallards were fed a diet containing 0 or 150 ppm of the PCB Aroclor 1242 for 12 weeks during which egg laying was induced. Laying started in both groups an average of 33 days after PCB treatment began. All hens were allowed to lay a 20-egg clutch; 15 eggs from each clutch were artificially incubated. Eleven hens from each group completed the clutch. There was no diff
Authors
S. D. Haseltine, R. M. Prouty
The Least Bell's vireo in California: A de facto endangered race
No abstract available.
Authors
S. Goldwasser, D. Gaines, S.R. Wilbur
Ferdinand Deppes Kollecktion mexikanischer Saugetiere am Museum fur Naturkunde der Humboldt-Universitat zu Berlin--historische Bedeutung und gegenwartige museoligische Erschliessung
No abstract available.
Authors
R. Angermann, A.L. Gardner
Tufted puffin from Laysan - First occurrence in the tropical Pacific
No abstract available.
Authors
R. B. Clapp, J.B. Giezentanner
Occurrence of central Pacific blue-faced booby and sooty tern in southeast Asia
No abstract available.
Authors
R. B. Clapp
The human influence on seabird nesting success: Conservation implications
Based on studies of brown pelicans Pelecanus occidentalis californicus and Heermann's gulls Larus heermanni, disturbances by recreationists, educational groups, local fishermen and scientists alike can be seriously disruptive and damaging to breeding seabirds in the Gulf of California and off the west coast of Baja California. Similar instances have been identified throughout the world—the problem
Authors
D. W. Anderson, J.O. Keith
Nest-size and colony characteristics of wading birds in selected Atlantic Coast colonies
Nests of 5 species of wading birds were identified and marked during the breeding season at 6 locations from Massachusetts to North Carolina. At the end of the breeding season 12 characteristics of nest-site location were measured. Nest locations were mapped to examine dispersion and nearest neighbor relationships. Multivariate analyses were used to describe and compare sites and species.....We fo
Authors
D.L. Beaver, R. G. Osborn, T. W. Custer
On getting involved
The American Ornithologists' Union and its members had an early history of involvement in public affairs and conservation activities. A very active Committee on Bird Protection was among the first of the service committees to be established. In the 1880s it gathered data on the plumage trade and worked for legislation to protect birds, preparing a model law for the protection of nongame birds tha
Authors
Richard C. Banks
Persistence in earthworms and potential hazards to birds of soil applied DDT, dieldrin, and heptachlor
(1) DDT, dieldrin, and heptachlor were each applied to separate replicate plots in a hay field at 0.6, 2.2, or 9.0 kg/ha. For 11 yr thereafter, soil and earthworms were analysed for residues. (2) The average ratios of residues in earthworms (dry weight) to residues in soil (dry weight) were: total DDT, 5; dieldrin, 8; and heptachlor epoxide, 10. The average time for the initial residues in soil to
Authors
W. N. Beyer, C.D. Gish