Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16904
Plasma lipid metabolites and refueling performance of Semi palmated Sandpipers at migratory stopovers Plasma lipid metabolites and refueling performance of Semi palmated Sandpipers at migratory stopovers
Assessing stopover habitat quality and refueling performance of individual birds is crucial to the conservation and management of migratory shorebirds. Plasma lipid metabolites indicate the trajectory of mass change in individuals and may be a more accurate measure of refueling performance at a particular site than static measures such as nutrient reserves. We measured lipid metabolites...
Authors
J. E. Lyons, J.A. Collazo, C. Guglielmo
Bufo boreas Baird and Girard, 1852(b): western toad Bufo boreas Baird and Girard, 1852(b): western toad
No abstract available.
Authors
E. Muths, P. Nanjappa
Part II: Species accounts: Introduction Part II: Species accounts: Introduction
No abstract available.
Authors
M. Lannoo, Alisa L. Gallant, P. Nanjappa, L. Blackburn, R. Hendricks
North American Amphibian Monitoring Program (NAAMP) North American Amphibian Monitoring Program (NAAMP)
No abstract available.
Authors
L.A. Weir, M.J. Mossman
Water-quality data from ground- and surface-water sites near concentrated animal feeding operations (CAFOs) and non-CAFOs in the Shenandoah Valley and eastern shore of Virginia, January-February, 2004 Water-quality data from ground- and surface-water sites near concentrated animal feeding operations (CAFOs) and non-CAFOs in the Shenandoah Valley and eastern shore of Virginia, January-February, 2004
Concentrated animal feeding operations (CAFOs) result from the consolidation of small farms with animals into larger operations, leading to a higher density of animals per unit of land on CAFOs than on small farms. The density of animals and subsequent concentration of animal wastes potentially can cause contamination of nearby ground and surface waters. This report summarizes water...
Authors
Karen C. Rice, Michele M. Monti, Matthew R. Ettinger
A new species of Lonchophylla Thomas (Chiroptera: Phyllostomidae) from Ecuador A new species of Lonchophylla Thomas (Chiroptera: Phyllostomidae) from Ecuador
We describe Lonchophylla orcesi, sp. nov., from the Choco, a region of high biotic diversity, endemism, and rainfall along the western Andean slopes and Pacific lowlands of Colombia and Ecuador. One of the largest known Lonchophylla, it occurs sympatrically with at least two other species of Lonchophylla including the similar, but somewhat smaller L. robusta. We also recognize L. concava...
Authors
Luis Albuja V., Alfred L. Gardner
The herpetofauna of the Rincon area, Peninsula de Osa, Costa Rica, a Central American lowland evergreen forest site The herpetofauna of the Rincon area, Peninsula de Osa, Costa Rica, a Central American lowland evergreen forest site
No abstract available.
Authors
R.W. McDiarmid, J.M. Savage
Evaluating calling surveys Evaluating calling surveys
No abstract available.
Authors
Sam Droege, P. Eagle
Population trends of North American sea ducks as revealed by the Christmas Bird Count Population trends of North American sea ducks as revealed by the Christmas Bird Count
Relative to other waterfowl, sea ducks are not well understood, yet evidence from a variety of analyses suggests that as many as 10 of the 15 species of North American sea ducks may be declining in population. However, because of the difficulty of conducting surveys of breeding populations and the lack of range-wide winter surveys, few data are available to assess the population trends...
Authors
D.K. Niven, J.R. Sauer, G.S. Butcher
Estimating the number of animals in wildlife populations Estimating the number of animals in wildlife populations
INTRODUCTION In 1938, Howard M. Wight devoted 9 pages, which was an entire chapter in the first wildlife management techniques manual, to what he termed 'census' methods. As books and chapters such as this attest, the volume of literature on this subject has grown tremendously. Abundance estimation remains an active area of biometrical research, as reflected in the many differences...
Authors
R.A. Lancia, W. L. Kendall, K. H. Pollock, J.D. Nichols
Using hydrogeomorphic criteria to classify wetlands on Mt. Desert Island, Maine – Approach, classification system, and examples Using hydrogeomorphic criteria to classify wetlands on Mt. Desert Island, Maine – Approach, classification system, and examples
A wetland classification system was designed for Mt. Desert Island, Maine, to help categorize the large number of wetlands (over 1,200 mapped units) as an aid to understanding their hydrologic functions. The classification system, developed by the U.S. Geological Survey (USGS), in cooperation with the National Park Service, uses a modified hydrogeomorphic (HGM) approach, and assigns...
Authors
Martha G. Nielsen, Glenn R. Guntenspergen, Hilary A. Neckles
Quantifying production of salmon fry in an unscreened irrigation system: A case study on the Rangitata River, New Zealand Quantifying production of salmon fry in an unscreened irrigation system: A case study on the Rangitata River, New Zealand
Diversion of out-migrant juvenile salmon into unscreened irrigation and hydroelectric canals is thought to have contributed significantly to declining populations of anadromous salmonids in the Pacific Northwest but is seldom studied in detail. Here we describe a program to study the fate of Chinook salmon Oncorhynchus tshawytscha fry diverted into the unscreened Rangitata Diversion Race...
Authors
M. J. Unwin, M. Webb, R. J. Barker, William A. Link