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
Distribution of populations and hunting kill of the canvasback
No abstract available.
Authors
R. E. Stewart, A. D. Geis, C.D. Evans
Distribution and ecology of whistling swans in the Chesapeake Bay region
The Whistling Swan, Olor columbianus, is of particular significance in the Chesapeake Bay region, since major wintering and transient populations occur here regularly, constituting in some years more than half the total population of the species. Some of these concentrations are so large that they attract many bird-watchers, who often travel long distances to see them. Whistling Swans are also of
Authors
R. E. Stewart, J.H. Manning
Rodent repellents
Why rodent repellents are needed, how they are tested, and what ones are showing promise. Some of the best ones now known are too toxic, too costly, or both.
Authors
J.B. DeWitt, J.C. Besser
Birds and Aircraft on Midway Islands, 1956-57 Investigations
The purpose of this study is to determine the extent to which certain species of birds contribute to the hazard to aircraft at Midway; to learn more about the population dynamics and habits of these species to determine what type of control measures might be possible without endangering the species; and to test methods of control which are suggested. Most of the study has been devoted to the two s
Authors
K.W. Kenyon, D.W. Rice, C.S. Robbins, J.W. Aldrich
Birds of Maryland and the District of Columbia
No abstract available.
Authors
R. E. Stewart, C.S. Robbins
Tuberculosis of fish
The causes for the decrease in the catch of Pacific salmon over the past few years have been the subject of much controversy. A disease caused by an acid-fast organism and commonly called “fish tuberculosis,” one of a number of possible serious diseases affecting adult fish, may be contributing to this loss to a much greater extent than has been previously realized.
The purpose of this review of t
Record of the fungus Ichthyosporidium Caullery and Mesnil, 1905, in Idaho
No abstract available.
Authors
A. John Ross, Thomas J. Parisot
A possible cause of sunburn in fish
A LESION DESCRIBED AS A GRAY ΡATCH GENERALLY LOCATED ΑΝΤΕRIOR TO THE DORSAL FIN has been associated with high mortality of fish on numerous occasions in production hatcheries throughout the United States. This lesion has been called "sunburn" or "backpeel." No bacteria or other pathogens have been found in fish with these symptoms. For example, at a Montana hatchery in April 1956, mortality of 10