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In 1960, the Golden lion tamarin Leontopithecus rosalia was almost extinct in the wild and the captive population, with poor reproduction and survival, was not well established. In the 1970s, after many improvements, the captive population began to grow and the Poço das Antas Biological Reserve was created to protect the species. In the 1980s, long‐term research was begun on the demography and socio‐ecology...
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