The endangered salmon crisis in the Pacific Northwest has researchers scouring the scientific and institutional literature for data, analysis and information. The accessible publications are the foundation for much of the current work and debate. But, older materials and institutionally-generated information containing unique data are harder to locate. To accurately...
If the success of the Endangered Species Act (ESA) is measured by the number of endangered species that have been recovered and delisted, then the act is not very successful. Only 15 species have been delisted because of recovery in the history of the ESA. The Borax Lake chub (Gila...
Natural resource challenges in the American West feature a suite of actors and processes operating at different spatial and political scales, and crossing several administrative jurisdictions. I applied concepts of new environmental governance to Oregon’s greater sage-grouse (Centrocercus urophasianus) conservation strategy, focusing, in particular, on features of voluntary conservation arrangements...
Estimating the abundance of long-lived, migratory animals is challenging but essential
for managing populations. We provide the first abundance estimates of endangered humpback
whales Megaptera novaeangliae from their breeding grounds in Oceania, South Pacific.
Using fluke photo-identification (1999−2004, n = 660 individuals) and microsatellite genotypes
(1999−2005, n = 840 individuals),...
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estimates of abundance and trend of an endangered population 12
of humpback whales (Megaptera novaeangliae
Estimating the abundance of long-lived, migratory animals is challenging but essential
for managing populations. We provide the first abundance estimates of endangered humpback
whales Megaptera novaeangliae from their breeding grounds in Oceania, South Pacific.
Using fluke photo-identification (1999−2004, n = 660 individuals) and microsatellite genotypes
(1999−2005, n = 840 individuals),...
Full Text:
abundance estimates of endangered hump-
back whales Megaptera novaeangliae from their breeding grounds in
Declining greater sage-grouse populations are causing concern for the future of this species across the western United States. Major
ecosystem issues, including exotic annual grass invasion and conifer encroachment, threaten vast acreages of sagebrush rangeland
and are primary threats to sage-grouse. We discuss types of problems facing sage-grouse habitat and...
1. Aquatic ecologists are working to develop theory and techniques for analysis of dynamic stream processes and communities of organisms. Such work is critical for the development of conservation plans that are relevant at the scale of entire ecosystems. The stream network is the foundation upon which stream systems are...
Estimating the abundance of long-lived, migratory animals is challenging but essential
for managing populations. We provide the first abundance estimates of endangered humpback
whales Megaptera novaeangliae from their breeding grounds in Oceania, South Pacific.
Using fluke photo-identification (1999−2004, n = 660 individuals) and microsatellite genotypes
(1999−2005, n = 840 individuals),...
The information contained in this report was prepared as part of NCHRP Project 25-25, Task 67, National Cooperative Highway Research Program, Transportation Research Board.
SPECIAL NOTE: This report IS NOT an official publication of the National Cooperative Highway Research Program, Transportation Research Board, National Research Council, or The National Academies.
A variety of approaches are used in sagebrush conservation. The Sagebrush/Sage Grouse Habitat Metric is one of several ecological measures that have been developed to help managers determine where to invest limited resources and how to calculate the ecological impact and improvement associated with the implementation of conservation actions.
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Species Group Nature Serve Global Status U.S. Endangered Species Act Status IUCN Red List Status
Abies