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Page 4279, results 106951 - 106975

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Ecology and behavior of the zenaida dove
J. W. Wiley
1991, Ornitologia Neotropical (2) 49-75
Data are summarized from a 10 year study of the Zenaida Dove (Zenaida aurita) in Puerto Rico and its offshore islands. The dove displays sexual size dimorphism, with males generally larger than females: Most activities (feeding, courtship, fighting) occurred in mornings and afternoons, whereas loafing and maintenance activities were more...
Effects of dietary boron and arsenic on the behavior of mallard ducklings
M.R. Whitworth, G.W. Pendleton, D. J. Hoffman, M.B. Camardese
1991, Environmental Toxicology and Chemistry (10) 911-916
High concentrations of boron and arsenic have been associated with irrigation drain water and aquatic plants consumed by waterfowl. Both compounds affect the central nervous system and cause generalized physiological distress in mammals and waterfowl. We examined sublethal effects of boron and arsenic on the behavior of developing mallard ducklings (Anas...
Postfledging survival and recruitment of known-origin roseate terns (Sterna dougallii) at Falkner Island, Connecticut
J. A. Spendelow
1991, Colonial Waterbirds (14) 108-115
From 1981-1990, 166 (10.1%) of 1636 Roseate Tern (Sterna dougallii) chicks banded from 1978-1985 at Falkner Island, Connecticut, [USA] and 68 (1.0%) of 6904 chicks banded during the same time period at all other colony sites in Connecticut, New York, and Massachusetts, were recaptured as breeding adults at Falkner Island....
Summer oxygen depletion in a diked New England estuary
J. W. Portnoy
1991, Estuaries (14) 122-129
The diked and freshened Herring River estuary (Wellfleet, Massachusetts) experiences regular summer hypoxia and one- to three-week periods of main stream anoxia, often accompanied by fish kills. Stream hypoxia results from the temperature-dependent increase in oxygen demand of organic matter released by diked salt marsh deposits; periods of total anoxial...
Denali Park wolf studies: Implications for Yellowstone
L. David Mech, Thomas J. Meier, John W. Burch
1991, Conference Paper, Transactions of the 56th North American Wildlife and Natural Resources Conference
The Northern Rocky Mountain Wolf Recovery Plan approved by the U.S. Fish and Wildlife Service (1987) recommends re-establishment of wolves (Canis lupus) in Yellowstone National Park. Bills proposing wolf re-establishment in the Park have been introduced into the U.S. House and Senate. However, several questions have been raised about the...
Tantilla bocourti
R.W. McDiarmid, S.H. Folke
1991, Catalogue of American Amphibians and Reptiles (526) 1-3
Trace elements and organochlorines in surf scoters from San Francisco Bay, 1985
H. M. Ohlendorf, Katherine C. Marois, Roy W. Lowe, Thomas E. Harvey, P.R. Kelly
1991, Environmental Monitoring and Assessment (18) 105-122
Surf scoters (Melanitta perspicillata) were collected from 6 locations in San Francisco Bay during January and March 1985. Overall, mean concentrations of cadmium and zinc were higher in livers of scoters from the southern region of the Bay, whereas mean iron and lead were higher in those from the northern...
Social organization in deer: Implications for localized management
W.F. Porter, N.E. Mathews, H.B. Underwood, R.W. Sage Jr., D.F. Behrend
1991, Environmental Management (15) 809-814
Populations of white-tailed deer (Odocoileus virginianus) inhabiting many state and national parks and suburban areas have grown to the point that they conflict with human activities. Conflicts range from destruction of vegetation through browsing to public perception that diseases carried by deer pose threats to human health. Traditional modes of...
Effects of pesticides on songbird productivity in conjunction with pecan cultivation in southern Georgia: A multiple-exposure experimental design
K.A. Patnode, Donald H. White
1991, Environmental Toxicology and Chemistry (10) 1479-1486
A prototypic experimental design was used to assess sublethal effects of multiple and varied organophosphates and carbamates on reproduction in birds. The design allowed for classification of pesticide exposure according to toxicity of applied compounds and type and frequency of applications. Daily survival rates (DSRs) of nests, eggs, and nestlings...
Extensive monitoring programmes viewed as long-term population studies: The case of North American waterfowl
J.D. Nichols
1991, Ibis (133) 89-98
Several long-running and geographically extensive survey programmes provide information used to make annual management decisions for North American waterfowl populations. Data from these programmes can also be viewed as resulting from long-term population studies and have formed the basis for a number of retrospective analyses. Short-term studies have been used...
Wolf predation risk associated with white-tailed deer movements
M.E. Nelson, L.D. Mech
1991, Canadian Journal of Zoology (69) 2696-2699
The survival of 159 yearling and adult deer (Odocoileus virginianus) was monitored by telemetry during 282 spring and 219 fall individual migrations to winter deeryards in northeastern Minnesota. A disproportionate number of deer were killed by wolves (Canis lupus) during fall migration relative to the short time they spent...
Effects of maternal and grandmaternal nutrition on deer mass and vulnerability to wolf predation
L.D. Mech, M.E. Nelson, R.E. McRoberts
1991, Journal of Mammalogy (72) 146-151
In a Minnesota ecosystem, mass of female white-tailed deer (Odocoileus virginianus) fawns and adults, and survival of adult females in the face of wolf (Canis lupus) predation, were directly related to maternal nutrition during gestation. Mass of single male fawns produced by 2-year-old females, and survival of yearlings to...
Eggshell modifications in captive American kestrels resulting from Aroclor 1248 in the diet
T. Peter Lowe, Rey C. Stendell
1991, Archives of Environmental Contamination and Toxicology (20) 519-522
American kestrels (Falco sparverius) were fed diets containing 3 μg/g Aroclor® 1 1248 or control diets from mid-January until July. Eggs were removed from first clutches 2 to 4 days after laying ceased and shell thickness and shell dimensions were measured. Contents of the third egg of each clutch, the carcasses...