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Page 5751, results 143751 - 143775

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Habitat selection by breeding red-winged blackbirds
P.H. Albers
1978, The Wilson Bulletin (90) 619-634
Habitat preferences of breeding Red-winged Blackbirds in an agricultural area were determined by comparing population density, landscape characteristics, and vegetational descriptions. Observations were made throughout the breeding season. Preferred breeding habitats of Red-wings, in order of preference, were wetlands, hayfields, old fields, and pastures. Males and...
The effects of petroleum on different stages of incubation in bird eggs
P.H. Albers
1978, Bulletin of Environmental Contamination and Toxicology (19) 624-630
Artificially incubated mallard eggs were treated externally with 5 μl of No. 2 fuel oil or 5 μl of Southern Louisiana crude oil at various times during the incubation period. Embryos were most sensitive to petroleum during the first 10 days of incubation. Southern Louisiana crude...
Organochlorine residues and eggshell thinning in anhingas and waders
Harry M. Ohlendorf, Erwin E. Klaas, T. Earl Kaiser
1978, Conference Paper, Proceedings of the 1977 conference of the colonial waterbird group
Residues of organochlorine compounds occur commonly in environmental samples and have been associated with adverse effects in numerous avian species (Cooke 1973; L. F. Stickel 1973; W. H. Stickel 1975; Ohlendorf et al. 1977; H. M. Ohlendorf, R. W. Risebrough, and K. Vermeer, unpublished manuscript). The affected species are...
Distribution and abundance patterns of the palila on Mauna Kea, Hawaii
Charles van Riper III, J. Michael Scott, D.M. Woodside
1978, The Auk (95) 518-527
Censuses of the known geographical range of the rare and endangered Palila were conducted in January (nonbreeding season) and September (breeding season) 1975. The habitat (mamane and naio forest of Mauna Kea, Hawaii) was divided into five major areas, with each analyzed for vegetational composition, phenology of the predominant tree...
Uptake and retention of dietary cadmium in mallard ducks
Donald H. White, M. T. Finley
1978, Environmental Research (17) 53-59
Adult mallard ducks fed 0, 2, 20, or 200 ppm of cadmium chloride in the diet were sacrificed at 30-day intervals and tissues were analyzed for cadmium. No birds died during the study and body weights did not change. The liver and kidney accumulated the highest levels of cadmium. Tissue...
Differential use of fresh water environments by wintering waterfowl of coastal Texas
Donald H. White, D. James
1978, The Wilson Bulletin (90) 99-111
A comparative study of the environmental relationships among 14 species of wintering waterfowl was conducted at the Welder Wildlife Foundation, San Patricia County, near Sinton, Texas during the fall and early winter of 1973. Measurements of 20 environmental factors (social, vegetational, physical, and chemical) were subjected to multivariate statistical methods...