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We have reintroduced 140 captive-born golden lion tamarins (Leontopithecus r. rosalia) into remnants of Atlantic Coastal Forest in the state of Rio de Janeiro, Brazil since 1984. About 60% are lost in the first post-release year. Golden lion tamarins are predatory omnivores and extractive foragers.
Access to outdoor environments has been promoted on several fronts as an important element of the long-term care of captive chimpanzees (Pan troglodytes). In order to document the potential benefits of outdoor access, this study compared the behavior of chimpanzees housed in outdoor/indoor runs (n=1
For the past several years, female perineal swellings in our lion-tailed macaque group have either not reached the maximum swelling stage or have not lasted as long at maximum swelling stage as in previous years. Examination of the long term swelling and copulatory records for seven adult females, r
Approximately 65% of captive lowland gorillas regurgitate and reingest their food on a regular basis, but the behavior has never been reported in wild populations. As a foodrelated behavior, regurgitation and reingestion (R/R) may be influenced by nutritional factors. As more information concerning