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
Endrin in birds: Lethal residues and secondary poisoning
Endrin residues in brains that are diagnostic of death were determined for several species of birds. Residues of 0.8 ppm or more of endrin in brain meant death; 0.6 ppm or less meant survival; between was a zone of overlap. These criteria indicate that some wild birds of the U.S., particularly white pelicans in the Northwest and two bald eagles, have been killed by endrin. Signs of endrin poison
Authors
W. H. Stickel, W. L. Reichel, D.L. Hughes
Brain cholinesterase activities of passerine birds in forests sprayed with cholinesterase inhibiting insecticides
Brain cholinesterase activities were determined in passerines collected from northwestern forests that had been sprayed with trichlorfon, acephate, and carbaryl at 0.56, 1.13 and 2.26 kg/ha. Trichlorfon and carbaryl inhibited cholinesterase activity slightly in only a few birds, primarily canopy dwellers. In contrast, acephate caused marked inhibition of cholinesterase activity in nearly all bir
Authors
J.G. Zinkl, C. J. Henny, P.J. Shea
An outline of the treatment and control of crane parasites
No abstract available.
Authors
J. W. Carpenter
Artificial insemination of cranes with frozen semen
For the first time (1978) artificial insemination (AI) with frozen greater sandhill crane (Grus canadensis tabida) semen resulted in fertile eggs and chicks. During the 2 year (1977-78) study, 6 of 27 eggs produced were fertile. Three chicks hatched. Semen samples used for insemination were frozen and stored in liquid nitrogen for two months or less. Recent improvements in the laboratory indicated
Authors
G.F. Gee, T.J. Sexton
Estimating population densities from variable circular plot surveys
No abstract available.
Authors
F.L. Ramsey, J. M. Scott
The role of the U.S. Fish and Wildlife Service in managing nongame birds
No abstract available.
Authors
S.H. Anderson
Vertical and temporal habitat utilization within a breeding bird community
No abstract available.
Authors
S.H. Anderson, H.H. Shugart, T.M. Smith
Bird communities associated with succession and management of lowland conifer forests
Data from published bird censuses were used to determine changes in avian communities in relation to plant succession, fire, type conversion, and timber management practices in lowland conifer forests in the northeastern United States. With modifications in current logging practices, habitat for the bird species that nest in undisturbed stands can be provided. Management guidelines are recommend
Authors
D.K. Dawson
Semipalmated sandpiper migration in North America
No abstract available.
Authors
B. A. Harrington, R. I. G. Morrison