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26 de nov. de 2011 · The aim of this paper is to define priority areas that might aid in the search for endangered anuran species in Costa Rica. We used species distribution models (Austin, 2002) and multicriteria analysis to identify localities with adequate conditions for the potential survival of relictual populations. Methods Study species
We reveal the dynamic and perilous state occupied by EW species. We provide an overview of the fates of the 95 species that, since 1950, are known to have persisted in ex situ care despite extirpation in the wild and characterize the present statuses of the 84 species currently assessed as EW.
Endangered Species*. Extinction, Biological. Risk Assessment. The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, a species extinction risk assessment tool, has been guiding conservation efforts for over 5 decades.
The IUCN Red List Categories and Criteria are intended to be an easily and widely understood system for classifying species at high risk of global extinction. It divides species into nine categories: Not Evaluated, Data Deficient, Least Concern, Near Threatened, Vulnerable, Endangered, Critically Endangered, Extinct in the Wild and Extinct.
24 de ene. de 1997 · Abstract. Geographic distribution data for endangered species in the United States were used to locate “hot spots” of threatened biodiversity. The hot spots for different species groups rarely overlap, except where anthropogenic activities reduce natural habitat in centers of endemism.
Established in 1964, the IUCN Red List of Threatened Species has evolved to become the world’s most comprehensive information source on the global conservation status of animal, fungi and plant species.
Geographic distribution data for endangered species in the United States were used to locate 'hot spots' of threatened biodiversity. The hot spots for different species groups rarely overlap, except where anthropogenic activities reduce natural habitat in centers of endemism.
