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Newsletter 2021-04-29 Carolyn Cowan [04/29/2021] – Fewer than 100 Sumatran rhinos are believed to remain on Earth, and the species faces dire threats due to a low birth rate, habitat loss and fragmentation, and poaching. – A new study finds that, despite its small size, the population retains significant genetic diversity, and likely has the genomic “toolkit” necessary to survive threats like climate change or disease. – The findings are good news for conservationists, but also come with a warning: an analysis of a recently extinct subpopulation revealed that a rapid spike in inbreeding preceded their extinction. – The research highlights dilemmas currently facing conservationists working to breed Sumatran rhinos in captivity: Should subspecies be mixed? And, when no alternatives exist, should captive rhinos be bred with their relatives?

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