Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16758
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
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
Characteristics of the near-bottom suspended sediment field over the continental shelf off northern California based on optical attenuation measurements during STRESS and SMILE Characteristics of the near-bottom suspended sediment field over the continental shelf off northern California based on optical attenuation measurements during STRESS and SMILE
Time-series measurements of current velocity, optical attenuation and surface wave intensity obtained during the Sediment Transport Events on Shelves and Slopes (STRESS) experiments, combined with shipboard measurements of conductivity, temperature and optical attenuation obtained during the Shelf Mixed Layer Experiment (SMILE), provide a description of the sediment concentration field...
Authors
J.H. Trowbridge, B. Butman, R. Limeburner
Effects of elevated water temperature and immunosuppressant treatment on prevalence and titer of infectious pancreatic necrosis virus in naturally infected brook trout Effects of elevated water temperature and immunosuppressant treatment on prevalence and titer of infectious pancreatic necrosis virus in naturally infected brook trout
Using fingerlings of brook trout Salvelinus fontinalis naturally infected with infectious pancreatic necrosis virus (IPNV), we demonstrated that elevated water temperature and treatment with the immunosuppressant triamcinolone acetonide (generic Kenalog®) significantly increases the titer of IPNV and probably also the prevalence of the infection. Stress-promoting treatments could...
Authors
P. E. McAllister, W. J. Owens, W. B. Schill
Herbivory on shoalgrass by wintering redheads in Texas Herbivory on shoalgrass by wintering redheads in Texas
An estimated 80% of redheads (Aythya americana) winter on the Laguna Madre of south Texas and Mexico and feed almost exclusively on shoalgrass (Halodule wrightii) rhizomes. Shoalgrass abundance has decreased by 60% over the past 30 years, and because the effects of shoalgrass loss on wintering redheads are unknown, we initiated a study to define habitat selection criteria and document...
Authors
Christine A. Mitchell, Thomas W. Custer, Phillip J. Zwank
The geologic framework of southern Lake Michigan The geologic framework of southern Lake Michigan
The bathymetry is controlled by the underlying bedrock. Bedrock comprises Silurian dolomite and Devonian limestone and shale. Quaternary sediment, 10 to 40 m thick, overlies bedrock. From Waukegan, Illinois, south to Indiana Harbor, the bottom is floored by till, sand, pebbles, and cobbvles. The lake floor is erosional or nondepositional where till or gravel-cobble pavement is exposed...
Authors
D.S. Foster, D. W. Folger