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: 41763
Tissue residues of dieldrin in relation to mortality in birds and mammals
An experiment was performed with Coturnix to learn what residue levels were indicative of death from dieldrin poisoning. Birds were fed diets containing 250, 50, 10, and 2 ppm dieldrin for periods up to 158 days. The dieldrin was 95% pure HEOD, which is 1,2,3,4,10,10-hexachloro-6, 7.epoxy. l,4,4a,5,6,7,8,8a-octahydro-l,4-endo,exo-5,8- dimethanonaphthalene. When half of a group was dead, the oth
Authors
W. H. Stickel, L. F. Stickel, J. W. Spann
No. 123. Puerto Rican parrot survey in eastern Puerto Rico
No abstract available.
Authors
C.B. Kepler
Blood protozoa of free-living birds
Blood protozoa were first reported from wild birds in 1884. Since then numerous surveys throughout the world have demonstrated their presence in a wide variety of hosts and localities with continuing designations of new species. Taxonomic determinations include parasites in the genera Plasmodium, Haemoproteus, Leucocytozoon, Babesia, Lankesterella and Trypanosoma. Transmission of Plasmodium by mo
Authors
C. M. Herman
Black duck harvest and population dynamics in eastern Canada and the Atlantic Flyway
No abstract available.
Authors
R.K. Martinson, A. D. Geis, R.I. Smith
Natural history of the King Rail
The King Rail (Rallus elegans Audubon), largest of North American rails, is indeed an elegant bird, as its Latin name implies. Its striking appearance (fig. I), secretive nature, and association with a variety of wetland habitats make it a favorite of bird students and rail hunters. The King Rail is found in most of the eastern half of North America, from the Atlantic coast to the Great Plains and
Authors
Brooke Meanley
Effect of feeding and of DDT on the activity of hepatic glucose 6- phosphate dehydrogenase in two salmonids
The specific activity of liver glucose 6-phosphate dehydrogenase in yearling rainbow trout remained unchanged when the fish were starved for periods as long as 8 weeks and when starved animals were fed diets of various compositions. Injection of insulin concurrently with refeeding also failed to alter the specific activity of the enzyme in trout. The absence of a dietary or insulin influence on th
Authors
Donald R. Buhler, P. Benville
Chronic oral DDT toxicity in juvenile coho and chinook salmon
Technical and p,p′-DDT was incorporated into test diets and fed to juvenile chinook and coho salmon for periods as long as 95 days. Pure p,p′-DDT was slightly more toxic to young salmon than was the technical DDT mixture. Chinook salmon appeared to be 2–3 times more sensitive to a given concentration of DDT in the diet than were coho salmon. The size of the fish greatly influenced toxicity, smalle
Authors
Donald R. Buhler, Mary E. Rasmusson, W.E. Shanks
Comparison of thermal data from airborne and vessel surveys of Lake Erie
A study of the applications of airborne infrared equipment for detecting water masses and currents of the Great Lakes is described. Infrared scanners were used to make thermal strip maps and an infrared radiometer was used to obtain surface temperatures of the western end of Lake Erie and the lower Detroit River. Simultaneously, surface water temperatures were taken and water samples were collecte
Authors
Alfred M. Beeton, James W. Moffett, Dana C. Parker