Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16783
Effects of chronic dietary lead in American kestrels (Falco sparverius)
American kestrels were fed a diet containing 0, 10, or 50 ppm lead (Pb) powder for at least 5 mo. Blood delta-aminolevulinic acid dehydratase (ALAD) activity in birds receiving 50 ppm Pb was as low as 20% of controls but no significant effects were noted in packed cell volume (PCV) or hemoglobin concentration (Hb). Mean liver Pb residues in birds fed 50 ppm Pb were 1.3 and 2.4 ppm (dry wt) for mal
Authors
J. Christian Franson, Louis Sileo, Oliver H. Pattee, John F. Moore
Assessing hazards of organophosphate pesticides to wildlife
No abstract available.
Authors
C. E. Grue, W. J. Fleming, D.G. Busby, E. F. Hill
Heavy metal residues in Louisiana catfish below national averages
No abstract available.
Authors
J.B. Graves, G.U. Mayfield, D.P. Coulon, J.D. Newson
Crane reproductive physiology and conservation
Some unique features of crane reproduction, management, and conservation are described. Because cranes are sexually monomorphic, sexing is difficult and must be accomplished using behavior, laparoscopy, cloacal examination, genetic techniques, or fecal steroid analysis. Although husbandry techniques for cranes are similar to those used with other nondomestic birds, a number of basic characteristic
Authors
G.F. Gee
Status of the common tern (Sterna hirundo) in the tropical Pacific, with a note on records of the black-naped tern (Sterna sumatrana) in Hawaii
No abstract available.
Authors
R. B. Clapp, R.C. Laybourne, R. L. Pyle
First record of whiskered tern from the tropical Pacific
No abstract available.
Authors
R. B. Clapp, R.C. Laybourne
DDT: Recent contamination in New Mexico and Arizona?
No abstract available.
Authors
D. R. Clark, A. J. Krynitsky
Gray bats killed by dieldrin at two additional Missouri caves: Aquatic macroinvertebrates found dead
No abstract available.
Authors
D. R. Clark, R.L. Clawson, C. J. Stafford
Year and age effects on residues of dieldrin and heptachlor in dead gray bats, Franklin County, Missouri— 1976, 1977, and 1978
Dead gray bats (Myotis grisescens) containing lethal concentrations of dieldrin were found beneath a maternity roost in Bat Cave Nos. 2 and 3, Franklin County, Missouri, in 1976, 1977 and 1978. Whereas residues of dieldrin, DDE [1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene] and PCB polychlorinated biphenyls in bats appeared not to change significantly over the 3 years, residues of heptachlor-relat
Authors
D. R. Clark, C. M. Bunck, E. Cromartie, R. K. LaVal
DDE in brown and white fat of hibernating bats
Samples of brown and white fat from hibernating bats (big brown bat, Eptesicus fuscus; little brown bat, Myotis lucifugus; and eastern pipistrelle, Pipistrellus subflavus) collected in western Maryland, USA, were analysed to determine lipid and DDE content. Amounts of brown fat, expressed as percentages of total bat weight, were the same for all three species. Lipid content of brown fat was signif
Authors
D. R. Clark, A. J. Krynitsky
Variation in survival and recovery rates of ring-necked ducks
Band recovery data were used to examine sex-specific, geographic, and temporal variations in survival and recovery rates of ring-necked ducks (Aythya collaris). Survival rates were higher (P < 0.05) for males than for females in the preseason-banded sample and in 2 of 3 postseason samples; recovery rates were higher (P < 0.05) for females in 1 postseason sample. Survival rates of postseason-banded
Authors
M.J. Conroy, R.T. Eberhardt
Fifty-ninth Christmas Bird Count. 176. Ocean City, Md
Some organophosphorus insecticides have been reported to interfere with reproduction and even cause the decline of small mammal populations. The effects of such anticholinesterases on plasma LH concentrations were examined in male mice (Peromyscus leucopus noveboracensis) intubated with water (OW) or acephate (50 and 100 mg/kg) and sacrificed after 4 h. Brain acetylcholinesterase (AChE) activity
Authors
C.S. Robbins