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| Mico marcai (Alperin, 1993)
in Silva, Bizri, Gonçalves, et al,. 2018.
photo: Marcelo Santana.
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The Roosevelt–Rondon Expedition marmoset Mico marcai was first collected in 1914 and all information on this primate previously came from three skins brought back by this expedition. As a result, M. marcai is categorized as Data Deficient on the IUCN Red List. As the presumed range of M. marcai lies on the path of the advancing arc of deforestation in Brazil, the collection of relevant data to assess the conservation status of this Amazonian species is of some urgency. Here we present the first field data on the distribution and population size of, and threats to, M. marcai, to reassess the species’ conservation status. During 2012–2015 we surveyed the species in the Marmelos–Aripuanã interfluve, and estimated its density using distance sampling. We also used spatial predictive modelling to estimate forest loss within the species range under two deforestation scenarios. We found the marmoset in 13 localities and estimated its extent of occurrence to be 31,073 km2. We estimated the species’ density to be 8.31 individuals/km2 and extrapolated this to estimate a total population of 258,218 individuals (CI 150,705–441,860). Under a business-as-usual deforestation scenario, c. 10,000 km2 of forest, comprising 33% of the species’ range, would be lost in three marmoset generations (c. 18 years), and we, therefore, recommend that M. marcai be categorized as Vulnerable on the IUCN Red List based on criterion A3c. Other Amazonian marmosets require similar reassessment as their ranges also fall in the path of the arc of deforestation.
Keywords: Brazil, conservation status, Data Deficient, forest loss, marmoset, Mico marcai, Roosevelt–Rondon Expedition, southern Amazonia
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| photos: Marcelo Santana. conservationleadershipprogramme.org |
Felipe Ennes Silva, Hani Rocha El Bizri, Jonas da Rosa Gonçalves, Lísley P. Lemos, Rodrigo Costa-Araújo, Ivan J. Lima, Aline Tavares Santos, Marcelo Ismar Santana, Caetano L. B. Franco and Jean P. Boubli. 2018. The Roosevelt–Rondon Expedition Marmoset Mico marcai: Unveiling the Conservation Status of A Data Deficient Species. Oryx—The International Journal of Conservation. DOI: 10.1017/S0030605318000303
Lack of information as a threat for Amazonian marmosets « Life Sciences « Cambridge Core Blog blog.journals.cambridge.org/2018/11/23/lack-of-information-as-a-threat-for-amazonian-marmosets
Guilherme Siniciato Terra Garbino. 2014. The Taxonomic Status of Mico marcai (Alperin 1993) and Mico manicorensis (van Roosmalen et al. 2000) (Cebidae, Callitrichinae) from Southwestern Brazilian Amazonia. International Journal of Primatology. 35 (2): 529–546. DOI: 10.1007/s10764-014-9766-4
Felipe Ennes Silva, Rodrigo Costa Araújo and Hermano Gomes Lopes Nunes. 2014. Population Trends and Conservation Status of Mico marcai in Aripuanã River Basin, Amazon, Brazil. FINAL REPORT. conservationleadershipprogramme.org/media/2014/12/Micos-Marcai_Brazil_Final-Report.pdf
