Artificial nesting boxes, which were hollow logs provided to tamarins during training, were also set up in the reserve. Reintroduced tamarins were supplied with food for ten months after their release. Sick or injured tamarins were captured and treated in a nearby rehabilitation centre. Tamarins were habituated to humans and fostered to aid survival in the wild. Tamarins were placed in enclosures measuring 15 x 4.5 x 3 m to acclimatize. Eight individuals were released as a family group and six individuals were released as pairs one month later. Three infants were born, one of which died due to illness. Of the 14 individuals released, seven died and two were removed. No statistical tests were carried out to determine whether this decrease was significant. Supporting evidence from individual studiesĪ before-and-after trial in 1954–1985 in a rainforest in Poço das Antas Reserve, Brazil found that translocation, alongside nine other interventions, led to a decline within one year of the population of captive-born golden lion tamarin Leontopithecus rosalia released into habitat with natural predators. Two studies, including one before-and-after study, in Vietnam and Indonesia found that most lorises reintroduced into habitat with predators, alongside other interventions, were assumed dead within approximately one year after being released.Two before-and-after studies in South Africa found that most vervet monkeys reintroduced into habitat with predators, alongside other interventions, survived over six months.One study in Gabon found that most mandrills reintroduced into habitat with predators, alongside other interventions, survived over 30 years.One study in Madagascar found that all reintroduced lemurs survived over 30 months after being released into habitat with predators, along with other interventions. One before-and-after study in Madagascar found that most black-and-white ruffed lemurs reintroduced into habitat with predators did not survive over five years.One before-and-after study in Gabon found that most western lowland gorillas reintroduced into habitat with predators, alongside other interventions, survived over nine months. Three studies, including two before-and-after studies, in the Congo, The Gambia and Guinea, found that most chimpanzees reintroduced into habitat with predators, alongside other interventions, survived over one to five years or increased population numbers.Two before-and-after studies in Brazil found that most golden lion tamarins reintroduced into habitat with predators, alongside other interventions, did not survive over one to seven years but reproduced succesfully.
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