Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16785
Radio tracking of white-tailed tropicbirds over the Caribbean sea
No abstract available.
Authors
F.C. Schaffner, M.R. Fuller, C.J. Pennycuick, H.H. Obrecht
White-faced ibis DDE-related reproductive problems continue at Carson Lake, Nevada
Organochlorine, mercury, and selenium contamination was studied in White-faced Ibis (Plegadis chihi) nesting at Carson Lake, Nevada in 1985 and 1986. DDE was detected in 138 of 140 eggs sampled. Eggshell thickness was negatively correlated with residues of DDE. DDE residues in ibis eggs, unlike residues in most other wading bird eggs from the Great Basin have not declined during the last decade
Authors
C. J. Henny, G.B. Herron
Whooping crane recovery: Progress through research
Cooperative efforts of the Canadian Wildlife Service (CWS), U.S. Fish and Wildlife Service (FWS), Wood Buffalo National Park in Canada, and Patuxent Wildlife Research Center have established a captive flock of whooping cranes, and at least two additional wild populations. Efforts have focused on research, habitat protection, law enforcement, and conservation education programs.
Authors
J. W. Carpenter, D.G. Smith
Damage to the forest ecosystem on Blue Mountain from zinc smelting
Emissions from two zinc smelters in Palmerton, Pennsylvania, have caused widespread destruction of the forest on Blue Mountain. There have been striking changes in the species composition and structure of the community of vascular plants, as well as population reductions of lichens, mosses, arthropods inhabiting the letter, and amphibians. Reductions in the populations of decomposers of organic
Authors
W. N. Beyer
Chemical analyses of deer bladder urine and urine collected from snow
Deer urine poured into snow yielded similar creatinine values for ratios with pertinent elements and compounds as did the urine removed from the bladder.
Authors
G. D. DelGiudice, L. D. Mech, U. S. Seal
Reproductive effects of nest-marking studies in an American white pelican colony
In 1981 and 1982 we studied the reproductive success of American White Pelicans in the Klamath Basin of northern California. We observed that reproductive success at one colony became reduced in 1981 when we entered that colony to collect eggs for chemical analysis and to mark nests for an assessment of nesting success. Those pelicans produced only 0.5 Y/N contrasted to pelicans nesting at an un
Authors
D.E. Boellstorff, D. W. Anderson, H. M. Ohlendorf, E.J. O'Neill
Effects of krenite® brush control agent (fosamine ammonium) on embryonic development in mallards and bobwhite
Fosamine ammonium (Krenite®) is a highly water-soluble carbamoylphosphonate herbicide used to control woody brush. It has been reported to be teratogenic to avian embryos following spray application of the eggs. The embryotoxic and teratogenic potential of Krenite was examined in mallards (Anas platyrhynchos) and bobwhite (Colinus virginianus). At 96 h of development, eggs were briefly immersed in
Authors
D. J. Hoffman
Northern Alabama colonies of the endangered grey bat Myotis grisescens: organochlorine contamination and mortality
From 1976 to 1986, dead and dying grey bats Myotis grisescens and grey bat guano were collected from caves along the Tennessee River in northern Alabama to determine the possible role of organochlorine chemicals — in particular wastes from a former DDT manufacturing plant near Huntsville—in the mortalities. Concentrations of chemical residues in brains were less than known lethal levels; certain o
Authors
D. R. Clark, F.M. Bagley, W.W. Johnson
Combined extraction-cleanup column chromatographic procedure for determination of dicofol in avian eggs
Dicofol in avian eggs was completely oxidized to dichlorobenzophenone (DCBP) when a hexane Soxhlet extraction procedure was used. This degradation did not occur with other avian tissues (muscle and liver). For this reason, a combined extraction-cleanup column chromatographic procedure, without added heat, was developed for the determination of dicofol in avian eggs. Homogenized subsamples of eggs
Authors
A. J. Krynitsky, C. J. Stafford, Stanley N. Wiemeyer
Wolf distribution and road density in Minnesota
No abstract available.
Authors
L. D. Mech, S. H. Fritts, G.L. Radde, W. J. Paul
Organochlorines and mercury in eggs of coastal terns and herons in California, USA
In San Franciso Bay, California, USA, concentrations of DDE and mercury in eggs differed among Caspian Tern, Forster's Tern, Black-crowned Night-Heron, and Snowy Egret in 1982. Geometric mean DDE concentrations were higher (P < 0.05) in Caspian Tern eggs (6.93 ppm, wet weight) than in eggs of other species (1.92-2.84 ppm). Mean mercury concentrations were significantly greater in Caspian Tern (1.2
Authors
H. M. Ohlendorf, T. W. Custer, Roy W. Lowe, M. Rigney, E. Cromartie