Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16734
A brown tree snake (Boiga irregularis) sighting from Texas A brown tree snake (Boiga irregularis) sighting from Texas
No abstract available.
Authors
M. J. McCoid, T. H. Fritts, E.W. Campbell
Distribution and abundance of birds wintering in Maryland, 1988-1993 Distribution and abundance of birds wintering in Maryland, 1988-1993
A winter bird survey was conducted throughout Maryland, primarily by volunteers, during the 6 winters of 1988 to 1993 between the dates of 10 Jan and 10 Feb. The state of Maryland is covered by 1231 blocks (9.5 sq. miles each), each comprising one-sixth of the standard U.S.G.S. 7.5 minute topographic quadrangle, and 548 of these blocks (44.5%) were surveyed for winter birds. Blocks were...
Authors
Jeff S. Hatfield, S.A. Ricciardi, G.A. Gough, D. Bystrak, Sam Droege, C.S. Robbins
Survival and causes of mortality in juvenile Puerto Rican parrots Survival and causes of mortality in juvenile Puerto Rican parrots
Fifteen juvenile Puerto Rican Parrots (Amazona vittata) from wild nests in 1985, 1986 and 1987 were radio monitored an average of 110 +- 15.9 (SE) d (range 4-209 d) post-fledgling. Minimum survival was 67% (n = 3) in 1985, 100% (n = 4) in 1986 and 43% (n = 7) in 1987. Most mortality (three of five deaths) occurred during the first 35 d following fledgling. A major cause of mortality was...
Authors
G.D. Lindsey, W.J. Arendt, Jan Kalina
On the importance of sampling variance to investigations of temporal variation in animal population size On the importance of sampling variance to investigations of temporal variation in animal population size
Our purpose here is to emphasize the need to properly deal with sampling variance when studying population variability and to present a means of doing so. We present an estimator for temporal variance of population size for the general case in which there are both sampling variances and covariances associated with estimates of population size. We illustrate the estimation approach with a...
Authors
W.A. Link, J.D. Nichols
First specimens of sooty shearwater, Newell's shearwater, and white-faced storm-petrel from American Samoa First specimens of sooty shearwater, Newell's shearwater, and white-faced storm-petrel from American Samoa
No abstract available.
Authors
G.S. Grant, P.W. Trail, R. B. Clapp
Methods of age determination of the desert tortoise, Gopherus agassizii Methods of age determination of the desert tortoise, Gopherus agassizii
No abstract available.
Authors
D.J. Germano, T. H. Fritts
[Obituary] Robert Earl Stewart, Sr., 1913-1993 [Obituary] Robert Earl Stewart, Sr., 1913-1993
No abstract available.
Authors
H.K. Nelson, D.L. Trauger
Carbofuran affects wildlife on Virginia corn fields Carbofuran affects wildlife on Virginia corn fields
Forty-four Virginia corn fields on 11 farms were searched for evidence of dead or debilitated wildlife following in-furrow application of granular carbofuran (Furadan 15G) during April and May 1991. Evidence of pesticide poisoned wildlife, including dead animals, debilitated animals, feather spots, and fur spots was found on 33 fields on 10 farms. Carcasses of 61 birds, 4 mammals, and 1...
Authors
E.R. Stinson, L.E. Hayes, P.B. Bush, Donald H. White
Effects of salinity on striped bass eggs and larvae from the Savannah River, Georgia Effects of salinity on striped bass eggs and larvae from the Savannah River, Georgia
Operation of a tide gate installed in the Savannah River by the U.S. Army Corps of Engineers to reduce dredging activities increased salinities upstream in important spawning habitat for striped bass Morone saxatilis. To assess the effects of salinity on survival and growth of striped bass at early life stages, newly fertilized eggs and 48-h-posthatch were exposed to serial dilutions of...
Authors
P. V. Winger, P. J. Lasier
Conservation reserve program: benefit for grassland birds in the northern plains Conservation reserve program: benefit for grassland birds in the northern plains
During the past few decades numbers of some species of upland-nesting birds in North America have declined. Duck species such as mallard (Anas platyrhynchos), northern pintail (A. acuta) and blue-winged teal (A. discors) have declined since the early 1970s and have remained low since 1985 (Caithamer et al. 1993). Some grassland-dependent nonwaterfowl species also have declined since 1966...
Authors
R. E. Reynolds, T.L. Shaffer, J.R. Sauer, B.G. Peterjohn
Wildlife radiotelemetry Wildlife radiotelemetry
No abstract available.
Authors
M.D. Samuel, M.R. Fuller
210Pb balance and implications for particle transport on the continental shelf, U.S. Middle Atlantic Bight 210Pb balance and implications for particle transport on the continental shelf, U.S. Middle Atlantic Bight
Supply of 210Pb to the continental shelf off the northeastern United States is dominated by the deposition from the atmosphere, the rate of which is reliably known from previously published work. Excess 210Pb inventories in the shelf sediments show accumulations that are nearly in balance with the supply, even in areas of relict sands where it is believed that no net accumulation of...
Authors
M.P. Bacon, Rebecca A. Belastock, Michael H. Bothner