Tsuji Yamato, Kawazoe Tatsuro
Department of Science and Engineering, Ishinomaki Senshu University, Ishinomaki, Miyagi, Japan.
Research Institute for Satomon, Tamba-Sasayama, Hyogo, Japan.
Primates. 2025 Jan;66(1):35-40. doi: 10.1007/s10329-024-01170-4. Epub 2024 Nov 28.
Information on the life histories of male macaques after leaving their natal troops is limited. A solitary male Japanese macaque (Macaca fuscata), estimated to be 5 years old, appeared in the urban area of Ishinomaki City, Miyagi Prefecture, northern Japan, where no troops are distributed, in May 2023. Because the animal was habituated to and fed frequently on garden crops, it likely came from the western part of the prefecture, where multiple crop-feeding troops are distributed. The male stayed in the hilly area in the central part of the city until June and then moved north in July. The male moved south to the tip of the Oshika Peninsula and returned to the urban area in August, after which the location of the male was unknown. This study demonstrated that (1) male macaques can move > 40 km from their natal troop, (2) the daily travel distance (average: 0.9 km) of solitary males was similar to that of troop animals, whereas the home-range size of solitary males was much bigger than that for single animals, and (3) the home-range location of solitary males changes quickly. These results implied that solitary males in novel environments prioritize finding new troops to join. Our study sheds light on aspects of male life history after dispersal.
关于雄性猕猴离开出生群体后的生活史信息有限。2023年5月，一只估计5岁的独居雄性日本猕猴（猕猴属）出现在日本北部宫城县石卷市的市区，该地区没有猕猴群体分布。由于这只猕猴习惯以园圃作物为食且经常觅食，它可能来自该县西部，那里分布着多个以作物为食的群体。这只雄性猕猴在该市中部的丘陵地区一直待到6月，然后在7月向北移动。8月，这只雄性猕猴向南移动到奥尻半岛的尖端，之后又回到市区，此后它的行踪不明。本研究表明：（1）雄性猕猴可以从其出生群体移动超过40公里；（2）独居雄性猕猴的每日移动距离（平均：0.9公里）与群体中的猕猴相似，而独居雄性猕猴的活动范围比单个动物的活动范围大得多；（3）独居雄性猕猴的活动范围位置变化很快。这些结果表明，在新环境中的独居雄性猕猴优先寻找新的群体加入。我们的研究揭示了雄性猕猴扩散后的生活史方面的情况。
