Prioritising Ex Situ Conservation for Malagasy Mammal Species in Line with IUCN's 'One Plan Approach to Conservation'

Madagascar, as one of the global biodiversity hotspots, hosts numerous unique terrestrial mammal species that need urgent protection. To identify priority species for conservation, an updated list of terrestrial Malagasy mammal species was compiled, including their threat status, distribution, endemism level, Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) listing, and Evolutionarily Distinct and Globally Endangered (EDGE) score. An overview of these species kept in zoos worldwide was created using the Zoological Information Management System and Zootierliste to assess ex situ conservation efforts. Nearly 60% of the 212 native terrestrial mammal species are threatened with extinction, with 18% being regional endemics, 39% microendemics, and 42% endemics. The majority of these species (92%) occur within protected areas. About half of Madagascar's mammals are listed under CITES, and less than half have an EDGE score. Only 34 species are kept in zoos globally, with 26 Red-Listed as threatened. Nine out of seventeen families are not represented in zoos. A total of 1545 institutions, primarily in Europe and North America, keep Malagasy mammal species, with successful reproduction reported for 28 species in the last 12 months, 23 of them listed as threatened on the IUCN Red List. To maximize conservation, we recommend reallocating resources towards priority species and implementing concerted ex situ and in situ actions as proposed by the IUCN's One Plan Approach.