Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16780
Marked DDE impairment of mallard reproduction in controlled studies
No abstract available.
Authors
R.G. Heath, J. W. Spann, J.F. Kreitzer
The killing efficiency of soft iron shot
A cooperative research effort between the ammunition industry and the Bureau of Sport Fisheries and Wildlife is aimed at finding a suitable non-toxic substitute for lead shot. A contract study by an independent research organization evaluated ways of coating or detoxifying lead shot or replacing it with another metal. As a result of that study, the only promising candidate is soft iron. Previous t
Authors
R. Andrews, J. R. Longcore
The greater shearwater in Maryland
No abstract available.
Authors
D.M. Bridge, S. Hundt, W.T. Van Velzen, A.C. Van Velzen
Effect of restrictive hunting regulations on canvasbacks and redhead harvest rates and survival
Because of low population levels, there were especially restrictive hunting regulations between 1958-1965, including complete closures during the 1960-1963 seasons, for canvasback (Aythya valimeria) and redhead (A. americana) ducks. Banding data from 1952 through 1965 indicated that restrictive regulations reduced both harvest and annual mortality rates. During the period with very restrictive reg
Authors
A. D. Geis, W.F. Crissey
Establishing hunting regulations and allowable harvest of mallards in the United States
As a major part of establishing hunting regulations each year in the United States, data for the mallard ( A m platyrhymhos) are examined extensively to estimate the effect of various harvest strategies on the breeding population the following spring. This requires estimates of the breeding-population level and of the production, harvest, and mortality rates. Predictions made at the time hunting r
Authors
A. D. Geis, R.K. Martinson, D.R. Anderson
The impact of disease on wildlife populations
It is postulated that disease is a product of adverse habitats. Overpopulation causes overutilization of food supplies, which results in malnutrition and a decrease in resistance to diseases. Examples of such ecological relationships in populations of Canada geese, California quail, red grouse, deer, rabbits, voles, mice and lemmings are presented.
Authors
C. M. Herman
What should we publish? (Editorial)
Publish residue analysis now, even though interpretation is not yet possible.
Authors
W. H. Stickel