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: 41764
Distinction of maritime and prairie populations of blue-winged teal
No abstract available.
Authors
R. E. Stewart, J.W. Aldrich
The killifish, fundulus heteroclitus, second intermediate host of the trematode, Ascocotyle (Phagicola) dimunuta
Ascocotyle (Phagicola) diminuta was described by Stunkard and Haviland (1924)from the intestine of wild rats collected at the Clason Point dump near New York by the City Board of Health. Feeding experiments have demonstrated that metacercariae encysted in the gills of the common killifish, Fundulus hetero clitus, are stages in the life-cycle of this parasite. The larvae have been found also, altho
Authors
H. W. Stunkard, Joseph R. Uzmann
Fifty-fifth Christmas Bird Count. 159. Ocean City, Md
The distribution of dynamic pressure behind a Harris' hawk's wing was sampled using a wake rake consisting of 15 pitot tubes and one static tube. The hawk was holding on to a perch, but at an air speed and gliding angle at which it was capable of gliding. The perch was instrumented, so that the lift developed by the wing was known and the lift coefficient could be calculated. The mean of 92 estima
Authors
C.S. Robbins
Nineteenth breeding-bird census. 9. Virgin bottomland white spruce forest
No abstract available.
Authors
R. E. Stewart
Winter losses of Canada geese at Pea Island, North Carolina
Report of research and findings to date. Topics discussed include: studies on life history and biology of gizzard worm; results of autopsies; experiments on survival and transmission of gizzard worm eggs and larvae in both field and laboratory; persistence of infections; and results of infections in geese of different ages. Cause of deaths has not been finally determined, but indications are tha
Authors
A.B. Cowan, C. M. Herman
DDT vs. wildlife: Relationships between quantities ingested, toxic effects and tissue storage
Symptoms appeared when quail and pheasants were fed diets containing 0.025-0.050% DDT. Symptoms appeared sooner as percentages increased. Young birds seemed more resistant than adults. Median lethal quantity for adult quail was about 1,200 mg./Kg. Young quail showed no ill-effects after ingesting 3,000 mg./Kg. during 10-week period. Adult pheasants died after ingesting 200-300 mg./Kg. Approximatel
Authors
J.B. DeWitt, J.V. Derby, G.F. Mangan
Neck-banding and other color-marking of waterfowl; its merits and shortcomings
No abstract available.
Authors
J.W. Aldrich, J.H. Steenis