Lava flows in mare imbrium: An evaluation of anomalously low earth-based radar reflectivity
G. G. Schaber, T.W. Thompson, S.H. Zisk
1975, The Moon (13) 395-423
The lunar maria reflect two to five times less Earth-based radar power than the highlands, the spectrally blue maria surfaces returning the lowest power levels. This effect of weakening signal return has been attributed to increased signal absorption related to the electrical and magnetic characteristics of...
Arctic palaeosalinities during late Cainozoic time
Y. Herman, J. R. O’Neil
1975, Nature (258) 591-595
DURING the late Cainozoic, alternations between interglacial and glacial conditions, manifested by waning and waxing of continental ice sheets coincided with the rise and fall of seawater temperatures. Our palaeontological and oxygen isotope data indicate that although the major oceans and low latititude seas underwent large...
Notes on winter feeding behavior and molt in Wilson's phalaropes
J. Burger, M. Howe
1975, The Auk (92) 442-451
Wilson's Phalaropes, Steganopus tricolor, migrate in late summer from the prairie regions of North America to their wintering grounds in the highlands of Peru and the inland and coastal waters of Chile, Bolivia, Paraguay, Uruguay, and Argentina (Holmes 1939, Meyer de Schauensee 1970). Reports on these birds from their wintering...
Emperor penguins nesting on Inaccessible Island
G.M. Jonkel, G.A. Llano
1975, Antarctic Journal of the United States (9) 93-95
Emperor penguins were observed nesting on Inaccessible I. during the 1973 winter. This is the southernmost nesting of emperor penguins thus far recorded; it also could be the first record of emperors attempting to start a new rookery. This site, however, may have been used by emperors in the past....
Effects of environmental pollutants on Connecticut and Maryland ospreys
Stanley N. Wiemeyer, P.R. Spitzer, W.C. Krantz, T. G. Lamont, E. Cromartie
1975, Journal of Wildlife Management (39) 124-139
Osprey (Pandion haliaetus) eggs were exchanged between Connecticut and Maryland osprey nests in 1968 and 1969 to test the hypothesis that the decline in reproductive success of Connecticut ospreys was caused by something within the external environment of the eggs. Incubation of 30 Connecticut osprey eggs by Maryland ospreys did...
California condor plumage and molt as field study aids
S.R. Wilbur
1975, California Fish and Game (61) 144-148
An analysis is made of the reliability of plumage and molt characteristics of the California condor for estimating age and identifying individual birds. Neither character seems sufficiently reliable to use in more than a general way....
The occurrence and status of the horned puffin in the western United States
W. Hoffman, W. Elliot, J. M. Scott
1975, Western Birds (6) 87-94
Osprey productivity during the mid-fifties in a portion of Chesapeake Bay
Charles J. Henny, Vernon D. Stotts
1975, Chesapeake Science (16) 219-220
No abstract available....
Unusual food items of the western diamondback rattlesnake (Crotalus atrox)
Kirke A. King
1975, Southwestern Naturalist (20) 416-417
No abstract available....
Brown pelicans: Improved reproduction off the southern California coast
D. W. Anderson, J.R. Jehl Jr., R.W. Risebrough, L.A. Woods Jr., L.R. DeWeese, W.G. Edgecomb
1975, Science (190) 806-808
Although still about 30 percent too low for population stability, productivity of California brown pelicans at their two northern colonies has improved significantly since 1971. Numbers of adults breeding probably reflect food supplies and recruitment from more successful colonies to the south, but improving fledging rates (up to 0.9 young...
Managing wood ducks by population units
E. Frank Bowers, F.W. Martin
1975, Transactions of the North American Wildlife and Natural Resources Conference (40) 300-324
Impacts of chemicals on waterfowl reproduction and survival
Donald H. White, L.F. Stickel
1975, International Waterfowl Symposium (1) 132-142
Residues of organochlorine pesticides, PCB's, heavy metals, and other toxic chemicals are ubiquitous in the biosphere and are commonly found in tissues and eggs of wild birds. This paper reviews research on the effects of these chemicals, with particular reference to waterfowl. Extensive mortality of waterfowl has occurred...
Reproductive biology of the band-tailed pigeon in Colorado and New Mexico
R. J. Gutierrez, C.E. Braun, T.P. Zapatka
1975, The Auk (92) 665-677
Band-tailed pigeons (Columba fasciata) occur in two major populations in western North America, a coastal population (C. f. monilis) and an interior population (C. f. fasciata) (A.O.U. 1957). The interior population inhabits portions of Colorado, New Mexico, Arizona, Utah, Texas, and the highlands of Mexico. This pigeon is one of...
Further studies on the use of enzyme profiles to monitor residue accumulation in wildlife: Plasma enzymes in starlings fed graded concentrations of morsodren, DDE, Aroclor 1254, and malathion
M. P. Dieter
1975, Archives of Environmental Contamination and Toxicology (3) 142-150
Wild-trapped starlings (Sturnus vulgaris) were fed concentrations of Morsodren (2, 4, and 8 ppm), DDE or Aroclor 1254 (5, 25, and 100 ppm), or malathion (8, 35, and 160 ppm) that were found to be sublethal in pen-reared Coturnix quail fed these amounts for 12 weeks. Plasma enzymes had to...
Caribbean coot collected in southern Florida
P.W. Sykes Jr.
1975, Florida Field Naturalist (3) 25-27
No abstract available....
Twenty-eighth winter bird-population study. 13. Upland tulip-tree-maple-oak forest
C.S. Robbins
1975, American Birds (29) 757-758
Thirty-ninth breeding bird census. 19. Upland tulip tree-maple-oak forest
C.S. Robbins
1975, American Birds (29) 1088-1089
Harvest trends of Canada geese in Utah
J. Tautin, J.B. Low
1975, Transactions of the North American Wildlife and Natural Resources Conference (40) 334-345
Report of the American Ornithologists' Union Committee on Conservation
D.B. Marshall, A. Baldridge, James C. Bartonek, W. King, O.T. Oure, R.J. Robel, J. M. Scott
1975, The Auk (92) 1B-16B
No abstract available....
Breeding bald eagles in captivity
J.R. Maestrelli, Stanley N. Wiemeyer
1975, The Wilson Bulletin (87) 45-53
A 7-year-old female Bald Eagle from Alabama was paired with a 4-year-old Alaskan male in a large flight pen during December 1969. Both birds were free of physical defects when originally placed in the pen but the female was blind in one eye prior to the 1973 breeding season.....Nesting first...
Looking out for the canvasback. Canvasback--King of the bay. Part V
Matthew C. Perry
1975, Ducks Unlimited (39) 14-16,
Birds imported into the United States in 1972
R. B. Clapp
1975, Special Scientific Report - Wildlife 193
Birds imported into the United States in 1972 are tabulated by species. Total numbers for the period 1968-72 are given for the more commonly imported taxa. The number of birds imported in 1972 (640,995) decreased by about one third from that of 1971, largely as a result of...
Experimental duck hunting seasons, San Luis Valley, Colorado, 1963-1970
Richard M. Hopper, Aelred D. Geis, Jack R. Grieb, Lewis Nelson Jr.
1975, Book, Wildlife Monographs
No abstract available....
Wintering Areas of Bird Species Hazardous to USAF Aircraft
1975, Report
The band-tailed pigeon in Utah: Results of the Utah segment of the four corners cooperative band-tailed pigeon investigation
J.C. Pederson, D.H. Nish
1975, Publication no. 75-1.
