Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16780
Birds of prey, DDT, and tussock moths in Pacific Northwest
No abstract available.
Authors
C. J. Henny
Residues in common flicker and mountain bluebird eggs one year after a DDT application
Common flicker (Colaptes auratus) and mountain bluebird (Sialia currucoides) eggs were examined 1 year after DDT application and showed a marked difference. Residue levels in mountain bluebird eggs were approximately 10 times higher than in common flicker eggs (5.29 to 0.58 ppm wet weight). These differences can be explained by disparate dietary habits. The mean level in American kestrel (Falco sp
Authors
C. J. Henny, R.A. Olson, D. L. Meeker
Reproductivity of Japanese quail fed mercuric chloride in the absence of vitamin D
Mercuric chloride (HgCl2) was tested at 16 p.p.m. Hg for vitamin D sparing activity by presenting it dietarily in the presence and absence of 25-hydroxycholecalciferol (25-HCC) to Japanese quail (Coturnix c. japonica) for 25 days. No gross signs characteristic of mercury poisoning were observed, but some predictable effects of vitamin D deficiency on avian reproduction were manifested within 10 da
Authors
E. F. Hill, J. H. Soares
Suspected lead toxicosis in a bald eagle
An immature bald eagle (Haliaeetus leucocephalus) was submitted to the University of Maryland, College Park, for clinical examination. The bird was thin, had green watery feces, and was unable to maintain itself in upright posture. Following radiography, the bird went into respiratory distress and died. Numerous lead shot were recovered from the gizzard, and chemical analysis of liver and kidney t
Authors
E. Jacobson, J. W. Carpenter, M. Novilla
Responsiveness of 6 to 14 generations of birds to dietary dieldrin toxicity
The lethal dietary toxicity of dieldrin was estimated repeatedly during 8 years of testing young bobwhites (Colinus virginianus), Japanese quail (Coturnix c. japonica), ring-necked pheasants (Phasianus colchicus), and mallards (Anas platyrhynchos). Toxicities, quantified as 8-day LC50 values (5 days on toxic diet, followed by 3 days of untreated feed), were estimated at least 18 times per species.
Authors
E. F. Hill, J. W. Spann, J.D. Williams
A research program for the endangered masked bobwhite
No abstract available.
Authors
D. H. Ellis, J.A. Serafin
Diabetes mellitus in a black-footed ferret
Diabetes mellitus was tentatively diagnosed in a black-footed ferret with polyuria, polydipsia, polyphagia, dehydration, and weight loss. Laboratory findings (marked hyperglycemia (724 mg/100 ml), glycosuria, and ketonuria) and the subsequent favorable response to insulin therapy confirmed the diagnosis. Although lesions were not observed in the pancreas, gross and histologic findings concomitant
Authors
J. W. Carpenter, M.N. Novilla
Unretrieved shooting loss of mourning doves in north-central South Carolina
Unretrieved loss for mourning doves (Zenaida macroura) in north-central South Carolina was between 27 and 41 percent of the retrieved kill for the 1973 through 1975 hunting seasons based on 1,396 doves shot by 281 hunters. Dove hunters hunted in groups, fired 8.6 shots per retrieved dove, and engaged in a substantial number of illegal activities. Increased dove populations and hunter bag resulted
Authors
G.H. Haas
Mid-Atlantic coast osprey population: Present numbers, productivity, pollutant contamination, and status
An estimated 233 + 16 (95% C.I.) pairs of ospreys (Pandion haliaetus) nested in coastal New Jersey, Delaware, Maryland, and Virginia in 1975. The present populations were considerably smaller than those reported for selected locations at the turn of the century in these four states. The New Jersey population has continued to decline during the last 25 years, although it showed some signs of impr
Authors
C. J. Henny, M. A. Byrd, J.A. Jacobs, P.D. McLain, M.R. Todd, B.F. Halla
Results of Georgia's clapper rail banding program
No abstract available.
Authors
T. Hon, R.R. Odom, D.P. Belcher
Fulvous whistling duck populations in Texas and Louisiana
No abstract available.
Authors
Edward L. Flickinger, D.S. Lobpries, H.A. Bateman
Plumage sequence and taxonomy of Laysan and Nihoa finches
No abstract available.
Authors
R.C. Banks, R.C. Laybourne