Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16972
Nests and eggs of colonial birds nesting in Malheur Lake, Oregon, with notes on DDE Nests and eggs of colonial birds nesting in Malheur Lake, Oregon, with notes on DDE
We describe the nests and eggs of 7 species of colonial birds that nested on Malheur Lake in Malheur National Wildlife Refuge, Oregon, in 1980 and 1981. All nests were constructed over water in stands of hardstem bulrush (Scirpus acutus). We compared nest measurements among species and found significant differences. Nest size was highly correlated with bird body mass. The heavier the...
Authors
J.E. Cornely, S.P. Thompson, Charles J. Henny, C.D. Littlefield
Telemetry via satellites for raptor studies Telemetry via satellites for raptor studies
Monitoring animal movements by satellite was first ac complished in 1970 with an elk in Wyoming. The large size of early transmitter packages restricted their use to very large animals. Miniaturization of electronic components in the 1980s allowed application of satellite telemetry to large birds. Satellite transmitters have been tested with mixed results on geese, swans, petrels...
Authors
M.R. Fuller, D. H. Ellis, S.S. Klugman
Proceedings of the Eighth American Woodcock Symposium Proceedings of the Eighth American Woodcock Symposium
No abstract available.
Authors
J. R. Longcore, G.F. Sepik
Point counts of birds in bottomland hardwood forests of the Mississippi Alluvial Valley: Duration, minimal sample size, and points versus visits Point counts of birds in bottomland hardwood forests of the Mississippi Alluvial Valley: Duration, minimal sample size, and points versus visits
The purpose of the research was to evaluate the efficacy of point count surveys in bottomland hardwood forests. The specific objectives were to determine: (1) whether the recommended distance measures for point count circular plots are useful in bottomland hardwood forests, (2) the optimum duration for each point count, (3) the optimum number of points to sample at each locality, (4) the...
Authors
W.P. Smith, D.J. Twedt, D.A. Wiedenfeld, P.B. Hamel, R.P. Ford, R.J. Cooper
Habitat suitability index model for brook trout in streams of the Southern Blue Ridge Province: Surrogate variables, model evaluation, and suggested improvements Habitat suitability index model for brook trout in streams of the Southern Blue Ridge Province: Surrogate variables, model evaluation, and suggested improvements
Data from several sources were collated and analyzed by correlation, regression, and principal components analysis to define surrrogate variables for use in the brook trout (Salvelinus fontinalis) habitat suitability index (HSI) model, and to evaluate the applicability of the model for assessing habitat in high elevation streams of the southern Blue Ridge Province (SBRP). In all data...
Authors
C. J. Schmitt, A.D. Lemly, P. V. Winger
Birds of prey in Virginia, an addendum to specimen records Birds of prey in Virginia, an addendum to specimen records
No abstract available.
Authors
D.W. Johnston, R. B. Clapp
Acidic Depositions: Effects on Wildlife and Habitats Acidic Depositions: Effects on Wildlife and Habitats
The phenomenon of 'acid rain' is not new; it was recognized in the mid-1800s in industrialized Europe. In the 1960s a synthesis of information about acidification began in Europe, along with predictions of ecological effects. In the U.S. studies of acidification began in the 1920s. By the late 1970s research efforts in the U.S. and Canada were better coordinated and in 1980 a 10-year...
Conservation of temperate North Pacific terns Conservation of temperate North Pacific terns
No abstract available.
Authors
R. B. Clapp, P. A. Buckley, F. G. Buckley
Point counts of landbirds in bottomland hardwood forests of the Mississippi Alluvial Valley: How long and how many? Point counts of landbirds in bottomland hardwood forests of the Mississippi Alluvial Valley: How long and how many?
To quantify efficacy of point count sampling in bottomland hardwood forests, we examined the influence of point count duration on corresponding estimates of number of individuals and species recorded. To accomplish this we conducted a totalof 82 point counts 7 May-16 May 1992distributed among three habitats (Wet, Mesic, Dry) in each of three regions within the lower Mississippi Alluvial...
Authors
W.P. Smith, D.A. Wiedenfeld, P.B. Hanel, D.J. Twedt, R.P. Ford, R.J. Cooper
Monitoring neotropical migrants on managed land: When, where, why Monitoring neotropical migrants on managed land: When, where, why
Relevant wildlife monitoring on managed lands lies somewhere between monitoring everything and monitoring nothing. Knowing the population status of all birds on a managed area would be potentially useful information but would be costly to collect, but without monitoring no link between management and wildlife populations can be made. A decision making process for developing appropriate...
Authors
Sam Droege