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Page 6454, results 161326 - 161350

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Publication Extents

Not all publications have extents, not all extents are completely accurate
The impact of disease on wildlife populations
C. M. Herman
1969, BioScience (19) 321-330
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...
Nationwide residues of organochlorine pesticides in wings of mallards and black ducks
Robert G. Heath
1969, Pesticides Monitoring Journal (3) 115-123
Nationwide monitoring of organochlorine pesticides in wings of more than 24,000 mallards and black ducks bagged during the1965 and 1966 hunting seasons showed DDE to be the predominant residue, followed in order by DDT, DDD, dieldrin, and heptachlor epoxide. Residues were generally highest in wings from the Atlantic and...
The killing efficiency of soft iron shot
R. Andrews, J. R. Longcore
1969, Transactions of the North American Wildlife and Natural Resources Conference (34) 337-345
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...
Relationships of the avifauna of San Esteban Island, Sonora
Richard C. Banks
1969, Condor (71) 88-93
Seven species of geographically variable birds have been reported as part of the resident avifauna of San Esteban Island in the Gulf of California, Sonora. Two of these, the Curvebilled Thrasher and the Blue-gray Gnatcatcher, may not actually have breeding populations there, at least at the present time. Of the...
Homes for Birds
E.R. Kalmbach, W.L. McAtee, D.D. Boone
1969, Conservation Bulletin 14, revised
The Breeding Bird Survey, 1967 and 1968
C.S. Robbins, W.T. Van Velzen
1969, Special Scientific Report - Wildlife 124
In the Breeding Bird Survey of North America, cooperators ran 982 survey routes in 1967 and 1,174 in 1968. All States except Hawaii and all Canadian Provinces except Newfoundland were included. Roadside routes are selected at random within 1-degree blocks of latitude and longitude. Each 24 1/2-mile route, with 3-minute...