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Page 6303, results 157551 - 157575

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Hawk migration over White Marsh, Maryland
C.D. Hackman, Charles J. Henny
1971, Chesapeake Science (12) 137-141
The average number of hawks observed per hour in autumn migration between 1951-1954 and 1958-1961 at White Marsh, Maryland, was compared. The counts indicated that the status of the ten species observed may be divided into three categories: (1) relatively stable species (red-tailed hawk), (2) declining species (sparrow hawk, red-shouldered...
Proceedings of the eighty-eighth stated meeting of the American Ornithologists' Union
Richard C. Banks
1971, The Auk (88) 144-162
The Eighty-eighth Stated Meeting of the American Ornithologists' Union was held 5-9 October 1970 at Buffalo, New York. Cosponsors were the Buffalo Society of Natural Sciences, the Buffalo Audubon Society, and the Buffalo Ornithological Society. Business sessions were held in the Statler Hilton Hotel on 5 October, and papers...
The occurrence and significance of polychlorinated biphenyls in the environment
E. H. Dustman, L.F. Stickel, L. J. Blus, W. L. Reichel, Stanley N. Wiemeyer
1971, Transactions of the North American Wildlife and Natural Resources Conference (36) 118-131
SUMMARY: Polychlorinated biphenyls constitute a group of chlorine-bearing compounds of industrial origin that have permeated the natural environment throughout the world. Their chemical structure resembles that of some of the organochlorine pesticides. They are troublesome interferences in gas chromatographic analysis of these...
Monitoring pesticides in wildlife
E. H. Dustman, W.E. Martin, R.G. Heath, W. L. Reichel
1971, Pesticides Monitoring Journal (5) 50-52
Early in the development of the wildlife monitoring program, certain criteria were recognized as being important in the selection of species of wild animals suitable for pesticide monitoring purposes. Ideally, the forms selected should be geographically well distributed, and they should be reasonably abundant and readily available for sampling....
Thickness of 1967-69 whooping crane eggshells compared to that of pre-1910 specimens
Daniel W. Anderson, J.F. Kreitzer
1971, The Auk (88) 433-434
Table 1 summarizes measurements of pre-1910 Whooping Crane (Grus americana) eggshells obtained from 10 North American museums and private egg collections. They include 30 eggs from Iowa, 5 from North Dakota, 13 from Manitoba, and 2 each from Saskatchewan and Alberta; 11 of the eggs were classified as subelliptical and...
Population ecology of the great blue heron with special reference to western Oregon
Charles J. Henny, M.R. Bethers
1971, Canadian Field-Naturalist (85) 205-209
Great Blue Heron (Ardea herodias) begin nesting in western Oregon about 1 month earlier than reported from the Philadelphia region and about 2 months earlier than reported from Southern Alberta. The number of young fledged per nesting pair in Oregon was 2.04 in 1970 which was nearly identical to the...
Publication dates of the North American Fauna series
Richard C. Banks
1971, The Auk (88) 676-676
The correct date of publication of numbers in the well-known North American Fauna series, begun in 1889, was printed on the cover of each issue through No. 48. After that time dates of publication that appear on the covers are either incomplete or incorrect. For taxonomic purposes, for developing a...
Equipment for transporting live black fly larvae (Diptera: Simuliiae)
I.B. Tarshis, T.R. Adkins
1971, Annals of the Entomological Society of America (64) 1194-1195
In studies relating to the biology and ecology of black flies, live larvae of at least 70 species of Simuliidae have been collected from their natural breeding sites and transported in containers with nonagitated water for short distances to the laboratory. One of us (Tarshis 1966) found, however, that even...