Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16785
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
Second nesting record for cedar waxwings in Worcester County, Maryland
No abstract available.
Authors
R. B. Clapp
Review of bird conservation literature
No abstract available.
Authors
R.C. Banks, H.S. Lapham, L.R. Mewaldt
Comparative toxicity of acephate in laboratory mice, white-footed mice and meadow voles
The LD50 (95% confidence limits) of the organophosphorus insecticide acephate was estimated to be 351, 380, and 321 mg/kg (295?416, 280?516, and 266?388 mg/kg) for CD-1 laboratory mice (Mus musculus), white-footed mice (Peromyscus leucopus noveboracensis), and meadow voles (Microtus pennsylvanicus), respectively. In a second study, these species were provided mash containing 0, 25, 100, and 400 pp
Authors
Barnett A. Rattner, D. J. Hoffman
Longevity records of North American birds: Columbidae through Paridae
No abstract available.
Authors
R. B. Clapp, M. K. Klimkiewicz, A.G. Futcher
The impact of snow geese grazing on Brigantine National Wildlife Refuge
No abstract available.
Authors
H.H. Obrecht, M. C. Perry
Food habits and distribution of wintering black ducks in the Atlantic flyway
No abstract available.
Authors
M. C. Perry, H.H. Obrecht
Fenvalerate residues in nontarget organisms from treated cotton fields
No abstract available.
Authors
R.S. Bennett, E. E. Klaas, J.R. Coats, M.A. Mayse, E. J. Kolbe
Effects of roads on small mammals
(1) The study was designed to determine the effects of roads on the diversity, spatial distribution, and density of small mammals. (2) Forty species of small mammal (5859 individuals) were snap-trapped in the study. Data resulted from 144 360 trap-nights of effort for an average of 4.06 captures per 100 trap-nights. (3) Small mammal community structure and density were both influenced by roads. Co
Authors
L.W. Adams, A. D. Geis
Species decline: A perspective on extinction, recovery, and propagation
This keynote address was presented at the Conference on the Conservation of Endangered Species in Zoological Parks and Aquariums on April 18, 1982 at the National Aquarium in Baltimore. It outlines 1) future trends in the world's environment, resources, and population; 2) factors affecting species decline; 3) reasons for preserving life forms; and 4) techniques, with emphasis on captive propagatio
Authors
J. W. Carpenter