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Page 6138, results 153426 - 153450

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Optimal exploitation strategies for an animal population in a stochastic serially correlated environment
David R. Anderson
1974, Dissertation Abstracts International (35) 3107
Optimal exploitation strategies were studied for an animal population in a stochastic, serially correlated environment. This is a general case and encompasses a number of important cases as simplifications. Data on the mallard (Anas platyrhynchos) were used to explore the exploitation strategies and test several hypotheses because relatively...
Proceedings of the ninety-first stated meeting of the American Ornithologists' Union
Richard C. Banks
1974, The Auk (91) 387-410
The Ninety-first Stated Meeting of the American Ornithologists' Union was held 8-12 October 1973 at Provincetown, on Cape Cod, Massachusetts, under the sponsorship of the Nuttall Ornithological Club, which was celebrating its centennial year. Business, technical, and social sessions were held in the Provincetown Inn. Field trips were taken...
Taxonomic status of certain clapper rails of southwestern United States and northwestern Mexico
Richard C. Banks, R. E. Tomlinson
1974, The Wilson Bulletin (86) 325-335
Examination of 58 Clapper Rail specimens taken in the breeding season from the Colorado Valley and the west coast of mainland Mexico verifies the distinctness of the races Rallus longirostris yomanensis, R. 1. rhizophorae, and R. 1. nayaritensis. Rallus 1. yumanensis is a relatively pale brown, pointed-winged, summer resident of...
Retraction of a longevity record for a 36-year-old herring gull
G.M. Jonkel, O.S. Pettingill Jr.
1974, The Auk (91) 432-432
The longevity record for a 36-year-old Herring Gull, Larus argentatus (Pettingill 1967, Auk 84: 123), is erroneous. Herring Gull with band number A-676871, the basis of the record, was found dead on 20 June 1966 on the shore of Little Traverse Bay near Petoskey, Michigan, and reported to the Bird...
Effects of DDT on bobwhite quail adrenal gland
J.W. Lehman, T.J. Peterle, C.M. Mulls
1974, Bulletin of Environmental Contamination and Toxicology (11) 407-414
A wide range of responses to sublethal levels of DDT exist, many of which are species specific and vary within each species depending upon age, sex, and physiological state. Sublethal levels of DDT do cause an increase in the adrenal cortical tissue of bobwhite quail, which may cause increased secretion...
Chlorinated hydrocarbon and mercury residues in woodcock in the United States, 1970-71
D. R. Clark Jr., M. Anne Ross McLane
1974, Pesticides Monitoring Journal (8) 15-22
During Late 1970 and early 1971, 229 woodcock (Philohela minor) were collected from 23 Eastern and Midwestern States. Analyses for chlorinated hydrocarbons and mercury in these migratory birds showed generally low levels which are not considered dangerous to human consumers. In this survey, Louisiana woodcock had lower...
Avian eggshell thickness: Variability and sampling
Erwin E. Klaas, H. M. Ohlendorf, R.G. Heath
1974, The Wilson Bulletin (86) 156-164
Measurements of shell thickness of the eggs of five species were subjected to nested analyses of variance. The analyses separated variation into two or three levels for which variances and percentages of the total variation were derived. The results show that differences among measurements of the same egg contribute little...
The effect of sublethal dosages of five pesticides and a polychlorinated biphenyl on the avoidance response of coturnix quail chicks
J.F. Kreitzer, G. H. Heinz
1974, Environmental Pollution (6) 21-29
Coturnix quail (Coturnix coturnix) chicks were given sublethal amounts of chlordane, dieldrin, endrin, DDE, Ceresan M, or Aroclor 1254 (a polychlorinated biphenyl) in their feed, beginning at seven days of age, and their avoidance response to a moving silhouette was measured daily for fourteen days. The birds were on dosage...
Relations of the brown pelican to certain environmental pollutants
L. J. Blus, A. A. Belisle, R. M. Prouty
1974, Pesticides Monitoring Journal (7) 181-194
Nearly all brown pelican eggs collected from 13 colonies in South Carolina, Florida, and California in 1969 and from 17 colonies in South Carolina and Florida in 1970 exhibited eggshell thinning. Of the 100 eggs analyzed for residues of pollutants, all eggs contained measurable quantities of DDE; most eggs contained...
Nationwide organochlorine and mercury residues in wings of adult mallard and black ducks during the 1969-70 hunting season
R.G. Heath, S.A. Hill
1974, Pesticides Monitoring Journal (7) 153-164
Nationwide monitoring of organochlorine and mercury residues in wings of approximately 5,200 adult mallards and black (ducks bagged during the 1969-70 hunting season showed DDE, as in 1965 and 1966, to be the predominant residue. PCB's were next in overall prevalence, followed by mercury, DDT, dieldrin, DDD, and heptachlor...
Residues of organochlorine pesticides, mercury, and PCB's in mourning doves from eastern United States--1970-71
J.F. Kreitzer
1974, Pesticides Monitoring Journal (7) 195-199
Mourning dove (Zenaidura macroura) breast muscle samples from birds collected in 1970-71 from Rhode Island, Pennsylvania, Maryland, Missouri, Kentucky, Virginia, Arkansas, Tennessee, North Carolina, South Carolina, Mississippi, Alabama, Georgia, Louisiana, and Florida were found to contain residues of DDT, DDE, DDD, polychlorinated biphenyls, dieldrin, mirex, mercury, and heptachlor epoxide in...
Record confirmed of Bahama woodstar in Florida
H.P. Langridge, P.W. Sykes Jr.
1974, The Auk (91) 849-849
We reported a Bahama Woodstar (Calliphlox evelynae) at Lantana, Florida, 26 August through 13 October 1971 (1972, Amer. Birds 26: 52). At that time, there was reservation by some about the identification. Colored slides taken of the bird at roost were subsequently examined by James Bond and Frank B. Gill,...
The breeding bird atlas of Montgomery County, Maryland, USA
M. K. Klimkiewicz, C.S. Robbins
1974, Acta Ornithologica (14) 446-458
A two-year Breeding Bird Atlas program for Montgomery County was undertaken by the Maryland Ornithological Society in 1971-1972. The county was divided into 65 5 km blocks and each block was assigned to an observer. Preliminary results show 46 to 93 species (mean 66) recorded per 5 km...
The winter bird survey of central Maryland, U.S.A
C.S. Robbins, D. Bystrak
1974, Acta Ornithologica (14) 254-271
A method for monitoring changes in winter bird populations was tested in central Maryland in the winters of 1970, 1971 and 1972. A systematic sample of 41 transects was established to sample an area of 6150 sq. km. Each transect, located at the center of a standard 7 1/2-minute topographic...
Percutaneous absorption of several chemicals, some pesticides included, in the red-winged blackbird
J.G. Rogers Jr., R.H. Cagan, M.R. Kare
1974, Environmental Physiology and Biochemistry (4) 104-111
Percutaneous absorption in vivo through the skin of the feet of the red-winged blackbird (Agelaius phoeniceus) has been investigated. Absorption after 18-24 hours exposure to 0.01 M solutions of salicylic acid, caffeine, urea, 2,4-D, dieldrin, diethylstilbesterol, and DDT was measured. Of these, only DDT and diethylstilbesterol were not...