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: 41778
Organochlorine pesticide residues in whooping cranes and Everglade kites
Three Whooping Cranes (Grus americana), two Everglade Kites (Rostrhamus sociabilis), and one kite egg were analyzed for pesticide residues at this laboratory. This is the first time that specimens from this rare population from the wild have ever been analyzed, and the results are herein reported.
Authors
Thair Lamont, William L. Reichel
A hoop-net trap for passerine birds--additional comments
No abstract available.
Authors
E.B. Baysinger
Causes of bald eagle mortality, 1960-1965
No abstract available.
Authors
N. C. Coon, L. N. Locke, E. Cromartie, W. L. Reichel
Age determination of raccoons
Age criteria, based on 61 skulls and eye lenses from 103 known-age captives, are described for separating raccoons (Procyon lotor) into eight age-classes as follows: young-of-the-year, 1, 2, 3, 4, 5, 6-7, > 7 years. Criteria studied were eye lens nitrogen, cranial suture closure, tooth wear and incisor cementum layers. Lens nitrogen increased rapidly up to 12 months of age, but at much reduced r
Authors
G.A. Grau, G.C. Sanderson, J.P. Rogers
Determining parameters for populations by using structural models
A method for calculating parameters necessary to maintain stable populations is described and the management implications of the method are discussed. This method depends upon knowledge of the population mortality rate schedule, the age at which the species reaches maturity, and recruitment rates or age ratios in the population. Four approaches are presented which yield information about the sta
Authors
C. J. Henny, W.S. Overton, H. M. Wight
Whistling swans breeding on the northwest coast of New Quebec
No abstract available.
Authors
J.D. Heyland, E.B. Chamberlain, C.F. Kimball, D.H. Baldwin
An outbreak of fowl cholera in Everglades National Park
No abstract available.
Authors
R.W. Klukas, L. N. Locke
Challenge infection as a means of determining the rate of disease resistant Trichomonas gallinae-free birds in a population
Trichomonas gallinae-free pigeons and mourning doves were infected with the Jones' Barn strain of T. gallinae to determine the rate of disease resistant T. gallinae-free birds in each population. Although all birds became infected 88% of the pigeons were resistant to trichomoniasis while 82% of the mourning doves were resistant. It was concluded that these birds had been previously infected and sp
Authors
R. M. Kocan, J.O. Knisley
Active anting in the Puerto Rican tanager
Anting, a bird’s intentional exposure of its body surface to chemical substances secreted by ants or other agents, has been recorded in over 20 species of birds of 40 families, mostly within the order Passeriformes. Our observations of anting in the Puerto Rico tanager (Neospingus speculiferus) extend the phenomenon to a new genus and the 14th species of the Thraupidae.
Authors
W.B. King, C.B. Kepler