Volampeno M Sylviane N, Masters Judith C, Downs Colleen T
School of Biological and Conservation Sciences, University of KwaZulu-Natal, Pietermaritzburg, South Africa.
Folia Primatol (Basel). 2010;81(5):305-14. doi: 10.1159/000322231. Epub 2011 Jan 15.
The critically endangered blue-eyed black lemur (Eulemur flavifrons) has one of the smallest distributions of any lemur, occurring only in the north-western forests of Madagascar. We report the results of a population estimate of this taxon in part of the Ankarafa Forest, Sahamalaza-Iles Radama National Park, a dry deciduous forest. We collected data between September 2007 and February 2008 using a total count method with marked individuals and known groups. In all, 228 individuals comprising 29 groups were counted. Group sizes ranged from 4 to 11 individuals with a mean of 8 ± 1.8. We estimated population density to be 1.0 individual/ha or 97.3 individuals/km(2) for our study area, which is higher than previous estimates reported for Ankarafa and other sites within the Sahamalaza Peninsula. Our mean group size, however, was similar to those determined in previous studies. Both group size and density of the blue-eyed black lemur were higher within the National Park than in previous studies outside the Park.
极度濒危的蓝眼黑狐猴（Eulemur flavifrons）是狐猴中分布范围最小的物种之一，仅分布于马达加斯加岛的西北部森林。我们报告了对萨哈马扎-伊莱斯·拉达马国家公园安卡拉法森林部分区域（一片干燥落叶林）内该分类单元的种群数量估计结果。我们于2007年9月至2008年2月期间，采用对有标记个体和已知群体进行全面计数的方法收集数据。总共统计到228只个体，分属29个群体。群体规模从4只到11只不等，平均为8±1.8只。我们估计研究区域内的种群密度为每公顷1.0只个体，即每平方公里97.3只个体，这高于之前针对安卡拉法以及萨哈马扎半岛其他地点所报告的估计值。然而，我们的平均群体规模与之前研究确定的结果相似。蓝眼黑狐猴在国家公园内的群体规模和密度均高于此前在公园外进行的研究。
