Jolly A, Oliver W L, O'Connor S M
Folia Primatol (Basel). 1982;39(1-2):115-23. doi: 10.1159/000156070.
The November 1980 census suggests that population size and troop ranges have remained stable since 1972 and in a small area since 1963. This prolongs the apparent stability described by some authors, remarkable in a 200-ha reserve containing a maximum of 300 Lemur catta. However, inadvertent introduction of Lemur fulvus rufus and apparent loss of tamarind trees, as well as general genetic and biogeographic considerations, imply this stability may not continue. Berently underlines the need for long-term, widespread primate research and practical conversation.
1980年11月的人口普查表明，自1972年以来，人口规模和种群范围一直保持稳定，自1963年以来在一个小区域内保持稳定。这延续了一些作者所描述的明显稳定性，在一个面积为200公顷、最多容纳300只环尾狐猴的保护区内，这种稳定性非常显著。然而，黑褐狐猴的意外引入和罗望子树的明显消失，以及一般的遗传和生物地理学考虑，意味着这种稳定性可能不会持续。贝伦特强调了长期、广泛开展灵长类动物研究和实际保护工作的必要性。
