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Revisión del Riesgo de Extinción de Anfibios en Madagascar: Conclusiones de Evaluación Global de Anfibios
Author(s) -
ANDREONE FRANCO,
CADLE JOHN E.,
COX NEIL,
GLAW FRANK,
NUSSBAUM RONALD A.,
RAXWORTHY CHRISTOPHER J.,
STUART SIMON N.,
VALLAN DENIS,
VENCES MIGUEL
Publication year - 2005
Publication title -
conservation biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.2
H-Index - 222
eISSN - 1523-1739
pISSN - 0888-8892
DOI - 10.1111/j.1523-1739.2005.00249.x
Subject(s) - threatened species , endangered species , iucn red list , extinction (optical mineralogy) , critically endangered , conservation dependent species , ecology , geography , habitat destruction , near threatened species , amphibian , habitat , population , biology , environmental health , paleontology , medicine
We assessed the extinction risks of Malagasy amphibians by evaluating their distribution, occurrence in protected areas, population trends, habitat quality, and prevalence in commercial trade. We estimated and mapped the distribution of each of the 220 described Malagasy species and applied, for the first time, the IUCN Red List categories and criteria to all species described at the time of the assessment. Nine species were categorized as critically endangered, 21 as endangered, and 25 as vulnerable. The most threatened species occur on the High Plateau and/or have been subjected to overcollection for the pet trade, but restricted extent of occurrence and ongoing habitat destruction were identified as the most important factors influencing extinction threats. The two areas with the majority of threatened species were the northern Tsaratanana‐Marojejy‐Masoala highlands and the southeastern Anosy Mountains. The current system of protected areas includes 82% of the threatened amphibian species. Of the critically endangered species, 6 did not occur in any protected area. For conservation of these species we recommend the creation of a reserve for the species of the Mantella aurantiaca group, the inclusion of two Scaphiophryne species in the Convention on the International Trade in Endangered Species Appendix II, and the suspension of commercial collecting for Mantella cowani. Field surveys during the last 15 years reveal no pervasive extinction of Malagasy amphibians resulting from disease or other agents, as has been reported in some other areas of the world.