Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16782
Census techniques for forest birds
1. Although bird censuses are imprecise, they have considerable value in a relative sense. 2. If the techniques are designed so as to minimize effects of variables that can be controlled, valid comparisons may be made among bird populations of two or more plots. 3. The spot-mapping method is recommended for greatest precision, and when a study is to be repeated over a period of years. Carefully
Authors
C.S. Robbins
Effects of highways on wildlife populations and habitats. Phase 1. Selection and evaluation of procedures
No abstract available.
Authors
L.W. Adams, A. D. Geis
Recovery Plan for the Eastern Timber Wolf
No abstract available.
Authors
R. E. Bailey, L. D. Mech, W. C. Hickling, R. Nicotera, L. Rutske, R. M. Linn, R. E. Radtke, K. Siderits
Summary appraisals of the nation's ground-water resources – Great Lakes region
The Great Lakes Regions, as a whole, has abundant supplies of water. Nearly 805,000 billion cubic feet of water is contained in the Great Lakes. An additional 35,000 billion cubic feet of potable ground water is available from storage in the region. Estimated ground-water discharge to the streams and lakes of the region is 26 billion gallons per day.
Despite this abundance of water, the United Sta
Authors
William G. Weist
Summary appraisals of the nation's ground-water resources – Mid-Atlantic region
The Mid-Atlantic Region covers a total area of about 108,000 square miles. It includes parts of Vermont, Massachusetts, New York, Pennsylvania, Maryland, West Virginia, and Virginia, the entire States of New Jersey and Delaware, and the District of Columbia. It encompasses the entire drainage basins (within the United States) of the Hudson, Delaware, Susquehanna, Potomac, and the James River and i
Authors
Allen Sinnott, Elliot Morse Cushing
Statistical inference from band recovery data - a handbook
No abstract available.
Authors
Cavell Brownie, David R. Anderson, Kenneth P. Burnham, Douglas S. Robson
Fish farmer must know what to do when turbidity becomes a problem in his ponds
No abstract available.
Authors
M. Martin
Karyotypic analysis of the Podocnemis turtles
No abstract available.
Authors
A. Rhodin, R.A. Mittermeier, A.L. Gardner, F. Medem
The seventy-eighty Audubon Christmas bird count. 393. Little Creek, Va
No abstract available.
Authors
P.W. Sykes
The seventy-eighth Audubon Christmas bird count. 376. Back Bay National Wildlife Refuge, Va
No abstract available.
Authors
P.W. Sykes
The seventy-eighth Audubon Christmas bird count, introduction: North Carolina, South Carolina, Georgia, Florida
No abstract available.
Authors
P.W. Sykes
Changes in a box turtle population during three decades
Studies of a Maryland population of marked box-turtles (Terrapene carolina) in 1945, 1955, 1965 and 1975 showed a pronounced decline in population size during the three decades; the greatest change came between 1965 and 1975, when numbers were reduced by half. Proportions of females and of young also declined. Fifteen % of the males and 11% of the females that were more than 20 years old in 1945
Authors
L. F. Stickel