Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16731
Hydrologic modeling as a predictive basis for ecological restoration of salt marshes Hydrologic modeling as a predictive basis for ecological restoration of salt marshes
Roads, bridges, causeways, impoundments, and dikes in the coastal zone often restrict tidal flow to salt marsh ecosystems. A dike with tide control structures, located at the mouth of the Herring River salt marsh estuarine system (Wellfleet, Massachusetts) since 1908, has effectively restricted tidal exchange, causing changes in marsh vegetation composition, degraded water quality, and...
Authors
C. T. Roman, R.W. Garvine, J. W. Portnoy
Accumulation and loss of arsenic and boron, alone and in combination, in mallard ducks Accumulation and loss of arsenic and boron, alone and in combination, in mallard ducks
Arsenic and boron are common in the environment, and wildlife can be exposed to toxic concentrations through both natural and human-influenced processes. We exposed adult male mallard ducks to dietary concentrations of 300 ppm arsenic as sodium arsenate, 1,600 ppm boron as boric acid, or both and estimated the tissue accumulation and loss rates when the ducks were returned to...
Authors
G.W. Pendleton, M.R. Whitworth, Glenn H. Olsen
Partnerships: Innovative strategies for wildlife conservation Partnerships: Innovative strategies for wildlife conservation
No abstract available.
Authors
D.L. Trauger, W.C. Tilt, C.B. Hatcher
Conservation partnerships in the lower Mississippi Alluvial Valley Conservation partnerships in the lower Mississippi Alluvial Valley
No abstract available.
Authors
D.R. Loesch, D.J. Twedt, K. J. Reinecke
Toxicity and bioaccumulation of sediment-associated contaminants using freshwater invertebrates: A review of methods and applications Toxicity and bioaccumulation of sediment-associated contaminants using freshwater invertebrates: A review of methods and applications
This paper reviews recent developments in methods for evaluating the toxicity and bioaccumulation of contaminants associated with freshwater sediments and summarizes example case studies demonstrating the application of these methods. Over the past decade, research has emphasized development of more specific testing procedures for conducting 10-d toxicity tests with the amphipod Hyalella...
Authors
C.G. Ingersoll, G.T. Ankley, D.A. Benoit, E.L. Brunson, G.A. Burton, F.J. Dwyer, R.A. Hoke, P.F. Landrum, T. J. Norberg-King, P. V. Winger
Yellow-headed blackbird (Xanthocephalus xanthocephalus) Yellow-headed blackbird (Xanthocephalus xanthocephalus)
No abstract available.
Authors
D.J. Twedt, R.D. Crawford
Productivity of saker falcons (Falco cherrug) in Mongolia Productivity of saker falcons (Falco cherrug) in Mongolia
During the summers 1994-1995, over 80 eyries were located on over 10,000 km of survey routes in Mongolia. Where possible, production and hatch dates were assessed when the eyries were found. For 75 nesting attempts, breeding success was found to be 92%. The average number of young per brood was 28 for 68 attempts. The number of young fledged per pair by year were 3.2 in 1994 and 2.6 in...
Authors
D. H. Ellis, Merlin H. Ellis, Pu Tsengeg
The Altay falcon: Origin, morphology and distribution The Altay falcon: Origin, morphology and distribution
The systematic position of the Altay falcon (Falco altaicus lorenzi) is perhaps the most enigmatic question lingering in falcon taxonomy. First reported to science in 1811, it has been treated as a race of the gyrfalcon (F. rusticolus), as a race of the saker (F. cherrug), as two separate species (F. lorenzi and F. altaicus), and as one to three color morphs of either the saker or the...
Authors
D. H. Ellis
What do we know about wolves and what more do we need to learn? What do we know about wolves and what more do we need to learn?
No abstract available.
Authors
L. David Mech
Delineating bird populations using ring recoveries Delineating bird populations using ring recoveries
We delineate bird populations using cluster analysis to group ringing sites based on pairwise comparisons of recoveries. Clustering provides a quantitative (but non-unique) grouping that can be used to examine the relationships of bird distributions at both local and regional geographic scales. Clustering is based on similarity matrices composed of pairwise comparisons of recovery...
Authors
G.W. Pendleton, J.R. Sauer
Population dynamics of neotropical migratory birds using agriculture-forest mosaics in Campeche, Mexico Population dynamics of neotropical migratory birds using agriculture-forest mosaics in Campeche, Mexico
In many areas of the tropics, forests are being converted to agriculture and other uses at a rapid rate. Previous research has documented that forest-breeding migratory birds are distributed across a wide variety of habitat types during midwinter. However, to evaluate the relative importance of different habitat types to wintering birds, we need to examine habitat-specific estimates of...
Authors
M.H. Wilson, M. Berlanga, D. Dawson, P. Wood, J. Sauer, C.S. Robbins