Heavy metals in mammals from two unmined copper-zinc deposits in Wisconsin
G. J. Smith, O.J. Rongstad
1981, Bulletin of Environmental Contamination and Toxicology (27) 28-33
No abstract available....
Tolerance of adult mallards to subacute ingestion of crude petroleum oil
Barnett A. Rattner
1981, Toxicology Letters (8) 337-342
Adult male mallards were fed untreated mash or mash containing 1.5% Prudhoe Bay crude oil for 7 days ad lib. During the initial 24 h of exposure to crude petroleum oil, ducks consumed less mash (P less than 0.05) and lost approx. 3.5% of their initial body weight (P less...
The structure of western warbler assemblages: Analysis of foraging behavior and habitat selection in Oregon
Michael L. Morrison
1981, The Auk (98) 578-588
This study examines the foraging behavior and habitat selection of a MacGillivray's (Oporornis tolmiei)-Orange-crowned (Vermivora celata)-Wilson's (Wilsonia pusilla) warbler assemblage that occurred on early-growth clearcuts in western Oregon during breeding. Sites were divided into two groups based on the presence or absence of deciduous trees. Density estimates for each species...
Plasma corticosterone and thyroxine concentrations during chronic ingestion of crude oil in mallard ducks (Anas platyrhynchos)
Barnett A. Rattner, W. C. Eastin Jr.
1981, Comparative Biochemistry and Physiology, Part C: Comparative Pharmacology (68) 103-107
1. Blood samples were collected from mallard ducks after 6, 12, and 18 weeks of dietary exposure to mash containing 0.015%, 0.150%, and 1.500% crude oil.2. Plasma corticosterone concentrations in ducks fed mash containing 0.150% or 1.500% Alaskan Prudhoe Bay crude oil were uniformly depressed when compared to values in...
Asiatic clam (Corbicula manilensis) and other foods used by waterfowl in the James River, Virginia
Matthew C. Perry, F.M. Uhler
1981, Estuaries (4) 229-233
Corbicula manilensis was found in the gizzards of 24 ducks of 5 species taken from the James River, Virginia, between 1973 and 1976. Percent average volume in these species ranged from trace to 6%. This is the first known occurrence of this exotic clam in the food of duck in Chesapeake...
Thirty-third winter bird-population study. 5. Upland tulip-tree--maple--oak forest
C.S. Robbins
1981, American Birds (35) 23
Forty-fourth breeding bird census. 10. Upland tulip-tree--maple--oak forest
C.S. Robbins
1981, American Birds (35) 52
Avian surveys of large geographical areas: A systematic approach
J. M. Scott, J.D. Jacobi, F. L. Ramsey
1981, Wildlife Society Bulletin (9) 190-200
A multidisciplinary team approach was used to simultaneously map the distribution of birds, selected food items, and major vegetation types in 34,000- to 140,000-ha tracts in native Hawaiian forests. By using a team approach, large savings in time can be realized over attempts to conduct similar surveys of smaller scope,...
Whale sharks associated with fish schools off south Texas
W. Hoffman, T. H. Fritts, R.P. Reynolds
1981, Northeast Gulf Science (5) 55-57
No abstract available. ...
The Mayfield method of estimating nesting success: A model, estimators and simulation results
Gary L. Hensler, J.D. Nichols
1981, The Wilson Bulletin (93) 42-53
Using a nesting model proposed by Mayfield we show that the estimator he proposes is a maximum likelihood estimator (m.l.e.). M.l.e. theory allows us to calculate the asymptotic distribution of this estimator, and we propose an estimator of the asymptotic variance. Using these estimators we give approximate confidence...
Effects of lead shot ingestion on delta-aminolevulinic acid dehydratase activity, hemoglobin concentration, and serum chemistry in bald eagles
D. J. Hoffman, O. H. Pattee, Stanley N. Wiemeyer, B. Mulhern
1981, Journal of Wildlife Diseases (17) 423-431
Lead shot ingestion by bald eagles (Haliaeetus leucocephalus) is considered to be widespread and has been implicated in the death of eagles in nature. It was recently demonstrated under experimental conditions that ingestion of as few as 10 lead shot resulted in death...
Acute toxicities of toxaphene and endrin to larvae of seven species of amphibians
R.J. Hall, D. M. Swineford
1981, Toxicology Letters (8) 331-336
Seven species of amphibian larvae were exposed to toxaphene and endrin in a continuous-flow dosing system to determine differences in sensitivity to the two compounds, EC50 and LC50 estimates varied from those for Rana sphenocephala by no more than one order of magnitude when calculated on the basis of intended...
A review of bufflehead sex and age criteria with notes on weights
Charles J. Henny, J.L. Carter, Barbara J. Carter
1981, Wildfowl (32) 117-122
Summary: Buftleheads Bucephala albeola were collected along the Oregon coast during the hunting season. Birds were first sexed and aged upon cloacal and internal characteristics. Results were then compared with data derived from wing plumage. A small change was made in Carney's (1964) wing plumage key...
The effects of ingested petroleum on the maphthalene-metabolizing properties of the liver tissue in seawater-adapted mallard ducks (Anas platyrhynchos)
J. Gorsline, W. N. Holmes, J. Cronshaw
1981, Environmental Research (24) 377-390
Hepatic mixed function oxidase activities were estimated in seawater-adapted mallard ducks (Anas platyrhynchos) that had been consuming food contaminated with one of five different types of crude oil. After 50 days of exposure to contaminated food, enzyme activities of liver microsomal preparations were assessed in terms of their naphthalenemetabolizing properties...
Censusing wading bird colonies: An update on the 'flight-line' count method
R.M. Erwin
1981, Colonial Waterbirds (4) 91-95
1. Thirteen mixed-species heronries (10 in Florida, two in Virginia, one in North Carolina) were studied in 1980 as part of a project begun in 1979 aimed at evaluating the 'flight-line' census method..2. Standardized counts of Snowy and Cattle Egrets, Louisiana and Little Blue Herons flying to and from the...
Colony site dynamics and habitat use in Atlantic coast seabirds
R.M. Erwin, J. Galli, J. Burger
1981, The Auk (98) 550-561
Seabird colony sizes and movements were documented in the DelMarVa coastal region in 1976-1977 and in New Jersey in 1978-1979. Most colonies were found on marsh and dredge deposition islands and on barrier island beaches. For the "traditionally" beach-nesting Herring Gull, Common Tern, and Black Skimmer, larger, more stable colonies...
Iatrogenic salt poisoning in captive sandhill cranes
J. C. Franson, L. Sileo, W. James Fleming
1981, Journal of the American Veterinary Medical Association (179) 1211-1213
Salt poisoning developed in captive sandhill cranes (Grus canadensis) when sea salt was added to normal drinking water to produce a sodium chloride concentration of 1%. Two of 18 cranes died and 2 were euthanatized when moribund. Muscle weakness, paresis, dyspnea, and depression were observed. Brain and serum sodium, serum...
Marine turtles of the Galapagos Islands and adjacent areas of the eastern Pacific on the basis of observations made by J.R. Slevin 1905-1906
T. H. Fritts
1981, Journal of Herpetology (15) 293-301
The field notes of J. R. Slevin written during the expedition of the California Academy of Sciences to the Galapagos Islands in 1905-1096 contain previously unavailable data on the marine turtles of the eastern Pacific. 'Land basking' by green turtles in Galapagos was predominately, if not exclusively, a female behavior....
Recovery of cholinesterase activity in mallard ducklings administered organophosphorus pesticides
W. James Fleming, S.P. Bradbury
1981, Journal of Toxicology and Environmental Health (8) 885-897
Oral doses of the organophosphorus pesticides acephate, dicrotophos, fensulfothion, fonofos, malathion, and parathion were administered to mallard ducklings (Anas platyrhynchos), and brain and plasma cholinesterase (ChE) activities were determined for up to 77 d after dosing. In vivo recovery of brain ChE activity to within 2 standard deviations of the...
Organochlorine residues and mortality of herons
Harry M. Ohlendorf, Douglas M. Swineford, Louis N. Locke
1981, Pesticides Monitoring Journal (14) 125-135
Since 1966, 72 herons found dead or moribund in the field have been analyzed for organochlorine chemicals. In addition, 36 herons were obtained through systematic collections, and carcasses were analyzed to determine sublethal exposure to organochlorines. Brains of birds found dead or moribund were analyzed to determine whether the birds...
Effects of DDE and PCB (Aroclor 1260) on experimentally poisoned little brown bats (Myotis lucifugus): Lethal brain concentrations
D. R. Clark Jr., C. J. Stafford
1981, Journal of Toxicology and Environmental Health (7) 925-934
Adult female little brown bats (Myotis lucifugus) were collected in a church attic in North East, Cecil County, Md. Mealworms (Tenebrio molitor) containing organochlorine pollutants were fed to the bats as follows: 5 bats were dosed at 480 ppm DDE, 12 at 150 ppm DDE, 5 at 1000 ppm polychlorinated...
The effect of use limits on backcountry visitation trends in Yosemite National Park
J. W. van Wagtendonk
1981, Leisure Science (4) 311-323
Backcountry use in Yosemite National Park increased drastically during the decade starting in the mid 1960s. In 1975, use reached a maximum of nearly 79,000 visitors and 219,000 visitor nights. Since then use has leveled off to about 89 percent of the peak figures for visitors and 84 percent for...
Deer social organization and wolf predation in northeastern Minnesota
Michael E. Nelson, L. David Mech
1981, Book, Wildlife Monographs
No abstract available....
Dynamics, movements, and feeding ecology of a newly protected wolf population in northwestern Minnesota
Steven H. Fritts, L. David Mech
1981, Book, Wildlife Monographs
No abstract available....
Newsletter for the Accelerated Research Program for migratory shore and upland game birds
R.A. Coon
1981, Newsletter for the Accelerated Research Program for migratory shore and upland game birds No. 6.
