Earth fissures and localized differential subsidence
Thomas L. Holzer, Earl H. Pampeyan
1981, Water Resources Research (17) 223-227
Long linear tension cracks associated with declining groundwater levels at four sites in subsiding areas in south-central Arizona, Fremont Valley, California, and Las Vegas Valley, Nevada, occur near points of maximum convex-upward curvature in subsidence profiles oriented perpendicular to the cracks. Profiles are based on repeated precise vertical control surveys...
Gray bats and pollution in Missouri and northern Alabama
D. R. Clark Jr., C.M. Bunck, E. Cromartie, R. K. LaVal, M.D. Tuttle
1981, Bat Research News (22) 35-36(abs)
Gray bats died with lethal brain concentrations of dieldrin and rising levels of heptachlor epoxide in 1976, 1977, and 1978 at Bat Caves No. 2-3, Franklin County, Missouri. The colony disappeared in 1979. Dieldrin was banned in 1974 and 1981 was the last year for heptachlor use in Missouri. The...
Organochlorine concentrations in bald eagles: Brain/body lipid relations and hazard evaluation
K.R. Barbehenn, W. L. Reichel
1981, Journal of Toxicology and Environmental Health (8) 325-330
Residue levels of 12 organochlorine compounds found In the brains of bald eagles can be predicted from the corresponding concentrations in the carcass when expressed on a hexane‐extractable lipid basis. The compounds varied by a factor of about 3 in the degree to which they accumulated In the brain. An...
Effects of abundant species on the ability of observers to make accurate counts of birds
J. Michael Scott, Fred L. Ramsey
1981, The Auk (98) 610-613
Bird numbers can be estimated using a variety of methods (Emlen 1971, Berthold 1976, Reynolds et al. 1980). The number of birds counted is frequently reported in relation to some measure of effort: e.g. per unit area, per count period, per observer day, or per km of trail. The numbers...
Eustrongylides and pesticide levels in a great blue heron shot in Wisconsin
R. M. Windingstad, D. M. Swineford
1981, Prairie Naturalist (13) 161-162
The parasitic roundworm, Eustrongylides ignotus Jagersk, has been known to cause mortality and morbidity in members of the heron family in the eastern states of North America. To date no previous records exist for this nematode in Wisconsin. Even though eustrongylidiosis was first detected in the District of Columbia in...
Using captive propagation to help save the Puerto Rican parrot
J. W. Wiley, G.F. Gee
1981, AFA Watchbird (8) 4, 6-11
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....
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...
Forty-fourth breeding bird census. 10. Upland tulip-tree--maple--oak forest
C.S. Robbins
1981, American Birds (35) 52
Thirty-third winter bird-population study. 5. Upland tulip-tree--maple--oak forest
C.S. Robbins
1981, American Birds (35) 23
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...
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. ...
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...
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...
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...
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...
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...
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....
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...
