Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16731
Pathogens of cultured fishes: potential risks to wild fish populations Pathogens of cultured fishes: potential risks to wild fish populations
No abstract available at this time
Authors
V. S. Blazer, S. E. LaPatra
The genera flavobacterium and flexibacter The genera flavobacterium and flexibacter
No abstract available at this time
Authors
J.A. Bader, C. E. Starliper
Real-time ground-water-level monitoring in New Jersey Real-time ground-water-level monitoring in New Jersey
A network of seven observation wells that transmit ground-water-level data on a real-time basis through satellite telemetry is operating (started May 2001) in New Jersey through a cooperative effort of the U.S. Geological Survey (USGS) and the New Jersey Department of Environmental Protection (NJDEP). The water-level data from these observation wells are transmitted every 4 hours and...
Authors
Walter D. Jones, Anthony S. Navoy, Daryll A. Pope
Conducting regional environmental assessments: the Southern Appalachian experience Conducting regional environmental assessments: the Southern Appalachian experience
No abstract available.
Authors
C.W. Berish, B.R. Durbrow, J. E. Harrison, W.A. Jackson, K.H. Riitters
Morphometric changes in Yellow-headed Blackbirds during summer in central North Dakota Morphometric changes in Yellow-headed Blackbirds during summer in central North Dakota
Temporal stability of morphometric measurements is desirable when using avian morphology as a predictor of geographic origin. Therefore, to assess their temporal stability, we examined changes in morphology of Yellow-headed Blackbirds (Xanthocephalus xanthocephalus) from central North Dakota during summer. Measurements differed among age classes and between sexes. As expected, due to...
Authors
D.J. Twedt, G.M. Linz
Seasonal distribution and abundance of fishes and decapod crustaceans in a Cape Cod estuary Seasonal distribution and abundance of fishes and decapod crustaceans in a Cape Cod estuary
Sampling in several habitat types (sand/mud, eelgrass, sand, gravel, macroalgae/mud) during all seasons with a variety of gears in Nauset Marsh, Massachusetts during 1985-1987 found a fauna consisting of 35 fish and 10 decapod crustacean species. Although most of the abundant species were found in several habitat types, species richness and habitat use appeared to be highest for...
Authors
K.W. Able, M.P. Fahay, K.L. Heck, C. T. Roman, M.A. Lazzari, S.C. Kaiser
Nineteenth century mercury hazard to wading birds and cormorants of the Carson River, Nevada Nineteenth century mercury hazard to wading birds and cormorants of the Carson River, Nevada
Contemporary mercury interest relates to atmospheric deposition, contaminated fish stocks and exposed fish-eating wildlife. The focus is on methylmercury (MeHg) even though most contamination is of inorganic (IoHg) origin. However, IoHg is readily methylated in aquatic systems to become more hazardous to vertebrates. In response to a classic episode of historical (1859–1890) IoHg...
Authors
Charles J. Henny, E. F. Hill, D. J. Hoffman, M. G. Spalding, R. A. Grove
Demography of a population collapse: The Northern Idaho ground squirrel (Spermophilus brunneus brunneus) Demography of a population collapse: The Northern Idaho ground squirrel (Spermophilus brunneus brunneus)
We studied the demography of a population of Northern Idaho ground squirrels (Spermophilus brunneus brunneus) in Adams Co., Idaho. The population was completely censused yearly from 1987 to 1999, during which time it declined from 272 to 10 animals. The finite population growth rate, based on a Leslie matrix model of average life-history parameters, was only 0.72 (i.e., significantly
Authors
P. W. Sherman, M.C. Runge
Blood selenium concentrations and enzyme activities related to glutathione metabolism in wild emperor geese Blood selenium concentrations and enzyme activities related to glutathione metabolism in wild emperor geese
In 1998, we collected blood samples from 63 emperor geese (Chen canagica) on their breeding grounds on the Yukon-Kuskokwim Delta (YKD) in western Alaska, USA. We studied the relationship between selenium concentrations in whole blood and the activities of glutathione peroxidase and glutathione reductase in plasma. Experimental studies have shown that plasma activities of these enzymes...
Authors
J. Christian Franson, David J. Hoffman, Joel A. Schmutz
Book review: Bird census techniques, Second edition Book review: Bird census techniques, Second edition
Conservation concerns, federal mandates to monitor birds, and citizen science programs have spawned a variety of surveys that collect information on bird populations. Unfortunately, all too frequently these surveys are poorly designed and use inappropriate counting methods. Some of the flawed approaches reflect a lack of understanding of statistical design; many ornithologists simply are...
Authors
John R. Sauer
First record of the Arizona cotton rat (Sigmodon arizonae) in New Mexico First record of the Arizona cotton rat (Sigmodon arizonae) in New Mexico
No abstract available.
Authors
J.K. Frey, R.D. Fisher, M.A. Bogan, C. Jones