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: 41756
A new swamp sparrow from the Maryland coastal plain
No abstract available.
Authors
G.M. Bond, R. E. Stewart
A study of absorption and retention of lead in wild waterfowl in relation to clinical evidence of lead poisoning
No abstract available.
Authors
D.R. Coburn, D.W. Metzler, R. Treichler
Effects of five-year DDT application on breeding bird population
Aerial applications of DDT in oil at the rate of 2 pounds per acre applied over a four-year interval on bottomland forest resulted in a 26 percent decrease in the breeding bird population by the fifth spring. The American redstart, parula warbler, and red-eyed vireo suffered decreases of 44 percent, 40. percent, and 28 percent, respectively, over the four-year period. Only the redstart decreased s
Authors
C.S. Robbins, P. F. Springer, C.G. Webster
Fifteenth breeding bird census: Mixed northern hardwood, spruce-fir forest
No abstract available.
Authors
J.B. Cope, M.M. Hensley
The refuge in pheasant management
1. Cock pheasants in favorable habitats have demonstrated ability to withstand hunting pressures up to 300 gunhours per hundred acres and maintain a satisfactory remnant for breeding purposes. 2. Sex ratios of 10 or more hens per cock are adequate for the production of fertile eggs, and there is evidence that much wider ratios could be tolerated without loss of fertility. 3. Sex ratios dive
Authors
F.H. Dale
Further data on removal and repopulation of the breeding birds in a spruce-fir forest community
During June and July of 1950 the writers were engaged in a study of bird populations in northern Maine in conjunction with investigations to determine the effectiveness of the breeding bird population as a controlling agent of the spruce budworm, Choristoneura fumiferana. The field work was started in 1949 and the current project was a continuation. The entomological phase of the study during both
Authors
M.M. Hensley, J.B. Cope
Blood parasites from California ducks and geese
Blood smears were procured from 1,011 geese and ducks of 19 species from various locations in California. Parasites were found in 28 individuals. The parasites observed included Haemoproteus hermani, Leucocytozoon simondi, microfilaria, Plasmodium relictum (=P. biziurae), and Plasmodium sp. with elongate gametocytes. This is the first report of a natural infection with a Plasmodium in North Ame
Authors
C. M. Herman