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
The relation of selenium to western duck sickness
In 1936 Twomey and Twomey reported that 20-50 parts per million of selenium as sodium selenite in the drinking water produced poisoning in ducks in which the syndrome was identical with that produced by Clostridium botulinum type C, which had been considered the principal causative agent in western duck sickness (Kalmbach and Gunderson, 1934). In a more recent paper, Twomey, Twomey and Williams (
Authors
H. W. Lakin, E. R. Quortrup, N. Hotchkiss
Protein requirements of breeding bobwhite quail
No abstract available.
Authors
R. B. Nestler, W. W. Bailey, M.J. Rensberger, M.Y. Benner
Winter protein requirements of bobwhite quail
Three experiments involving 714 bobwhite quail were conducted at the Patuxent Research Refuge, Bowie, Maryland, during the winters of 1939-1941 to determine the protein requirement of quail maintained throug'h the winter.....Considering survival, live weights, feed consumption, and subsequent reproduction by the birds, the-9 to 13 per cent levels of crude dietary protein gave as good results as hi
Authors
R. B. Nestler, W. W. Bailey, L. M. Llewellyn, M.J. Rensberger
Abnormal feathering of pen-reared bobwhites
No abstract available.
Authors
R. B. Nestler, L. Llewellyn
Variations in nitrogen content and fish production in smallmouth black bass ponds
No abstract available.
Authors
E. W. Surber
Mathematical relationship between the length and the age of the rock bass, Ambloplites rupestris (Rafinesque)
No abstract available.
Authors
Ralph Hile
The age, growth, and bathymetric distribution of Reighard's chub, Leucichthys reighardi koelz, in Lake Michigan
Reighard's chub has come to be one of the most important species of the group since the serious decline in abundance of the larger representatives of the genus Leucichthys in Lake Michigan. An understanding of the biology of as many species of chubs as possible is essential if further depletion and the collapse of the fishery are to be prevented.
The age and growth of 331 individuals taken in 1932