We, the NMFS, issue a final determination to list the southern Distinct Population Segment (DPS) of Pacific eulachon (Thaleichthys pacificus; hereafter ‘‘eulachon’’) as a threatened species under the Endangered Species Act (ESA). We intend to consider protective regulations and critical habitat for this DPS in separate rulemaking. DATES: This final rule is effective on May 17, 2010. ADDRESSES: ...

Genetic monitoring is becoming an increasingly effective tool for determining population stability in endangered species. Evaluating trends in genetic diversity allows conservation managers to identify serious declines and possible extinction risks for threatened populations. Here we used microsatellite analyses to assess the stability of one of the largest known breeding populations of the end...

Coastal wetlands of the Yellow Sea and Bohai Sea, China, along East Asian–Australasian Flyway (EAAF) migratory route provide important stopover sites for waterbirds. Natural wetland loss caused by external stress has posed serious threats to population Elucidating extent which species depend on natural providing conservation management recommendations are steps toward relieving such declines. W...

Environmental ethicists believe it is immoral for human action to result in the extinction of a species. The US Endangered Species Act of 1973 codifies this belief. This paper describes an ongoing case study involving the development of a DSS model to predict the price of Florida scrub habitat. This habitat is crucial to the survival of the Florida scrub-jay, a bird found only in Florida that i...

The identification of historic and contemporary barriers to dispersal is central to the conservation of endangered amphibians, but may be hindered by their complex life history and elusive nature. The complementary information generated by mitochondrial (mtDNA) and microsatellite markers generates a valuable tool in elucidating population structure and the impact of habitat fragmentation. We ap...

Small populations of endangered species can be impacted by genetic processes such as drift and inbreeding that reduce population viability. As such, conservation genetic analyses that assess population levels of genetic variation and levels of gene flow can provide important information for managing threatened species. The São Paulo Marsh Antwren (Formicivora paludicola) is a recently-described...

As ancient gymnosperm and woody plants, cycads have survived through dramatic tectonic activities, climate fluctuation, and environmental variations making them of great significance in studying the origin and evolution of flora biodiversity. However, they are among the most threatened plant groups in the world. The principal aim of this review is to outline the distribution, diversity, and con...

Snow-fed river Pinder -a tributary of river Alaknanda in central Himalaya was explored for fish assemblages and habitat specificity. Altogether 27 fish species were reported from three orders, four families and nine genera. Cypriniformes order was dominating followed by Siluriformes and Salmoniformes. Shannon-Weiner diversity index (3.09 to 4.10) and Simpson index of diversity (0.81 to 0.92) of...

Critical habitat is defined under Section 2 of Canada’s Species at Risk Act (SARA) as, “the habitat necessary for the survival or recovery of a listed wildlife species and that is identified as the species’ critical habitat in the recovery strategy or in an action plan for the species”. SARA requires the development of recovery strategies for species listed as Endangered, Threatened or Extirpat...

Using the results of a survey of recovery plans for threatened and endangered species, we evaluated the role that Population Viability Analysis (PVA) has played in recovery planning and management of rare species in the United States. Although there was a significant increase over time in the percentage of plans presenting information on PVA and assigning recovery tasks to collect more such inf...