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: 41758
Observations on gas-bubble disease of fish
SOME DIFFICULTY has been experienced in raising fry and young fingerlings at the Puyallup hatchery of the Washington State Department of Game, a hatchery now in its fourth year of operation. There has been evidence of gas in the yolk-sac fry, and the mortality was always excessive among the fingerlings while reared in the hatchery troughs. The mortality rate decreased and evidence of gas-bubble di
A contagious disease of salmon, possibly of virus origin
Production records for 1885, 1891–1908, and 1929–49, indicate cyclic fluctuations for several important species of fish. The average annual take (all species) of 3,582,000 pounds in 1929–49 was 3,503,000 pounds below the 1891–1908 mean of 7,085,000 pounds. Decline in the output of lake herring alone from 5,841,000 pounds in 1891–1908 to 1,070,000 pounds in 1929–49—a drop of 4,771,000 pounds—more t
Authors
R.R. Rucker, W.J. Whipple, J.R. Parvin, C.A. Evans
Fifty-third Christmas Bird Count. 142. Southern Dorchester County, Md
No abstract available.
Authors
G. J. Smith
Fifty-third Christmas Bird Count. Summary of highest counts of individuals
No abstract available.
Authors
C.S. Robbins
The effects of DDT upon the survival and growth of nestling songbirds
In an experiment conducted during the summers of 1949 and 1950 at the Patuxent Research Refuge, Laurel, Maryland, two aerial applications of DDT were made at the rate of 3 pounds per acre. Sprayings were made over an experimental area of about 20 acres of abandoned fields bordered by woods and hedgerows. T\vo hundred and ninetythree bird boxes, with three different sizes of openings to accommodate
Authors
R.T. Mitchell, H.P. Blagbrough, R.C. VanEtten
Small only in size
A record small game trophy may be your next bag. You can check the weights of 27 fur bearers in the following pages. Pictures and charts are by expert technicians.
Authors
A. C. Martin