Survey of the long‐tailed macaques introduced onto Tinjil Island, Indonesia

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Abstract
From February 1988 though June 1990, 475 adult long‐tailed macaques (Macaca fascicularis) were released on Tinjil Island to establish a breeding program that will provide monkeys for biomedical research while contributing to Indonesia's primate conservation efforts. A survey was conducted during the summer of 1990 to assess the status of the island's population. Basic demographic data were consistent with those from other field studies of long‐tailed macaques, and estimates of reproductivity suggest a successful breeding program. The facility established on Tinjil Island should serve as a useful model for future primate resource and conservation programs.