Ranging behavior of Mahale chimpanzees: a 16 year study.
スポンサーリンク
概要
- 論文の詳細を見る
We have analyzed the ranging patterns of the Mimikire group (M group) of chimpanzees in the Mahale Mountains National Park, Tanzania. During 16 years, the chimpanzees moved over a total area of 25.2 or 27.4 km(2), as estimated by the grid-cell or minimum convex polygon (MCP) methods, respectively. Annually, the M group used an average of 18.4 km(2), or approximately 70 %, of the total home-range area. The chimpanzees had used 80 % of their total home range after 5 years and 95 % after 11 years. M group chimpanzees were observed more than half of the time in areas that composed only 15 % of their total home range. Thus, they typically moved over limited areas, visiting other parts of their range only occasionally. On average, the chimpanzees used 7.6 km(2) (in MCP) per month. Mean monthly range size was smallest at the end of the rainy season and largest at the end of the dry season, but there was much variability from year to year. The chimpanzees used many of the same areas every year when Saba comorensis fruits were abundant between August and January. In contrast, the chimpanzees used several different areas of their range in June. Here range overlap between years was relatively small. Over the 16 years of the study we found that the M group reduced their use of the northern part of their range and increased their frequency of visits to the eastern mountainous side of their home range. Changes in home-range size correlated positively with the number of adult females but not with the number of adult males. This finding does not support a prediction of the male-defended territory model proposed for some East African chimpanzee unit-groups.
- 2013-04-00
著者
関連論文
- Prevalence of muzzle-rubbing and hand-rubbing behavior in wild chimpanzees in Mahale Mountains National Park, Tanzania
- Sniffing behaviors in Mahale chimpanzees
- Tool-use for drinking water by immature chimpanzees of Mahale : prevalence of an unessential behavior
- Emergence, propagation or disappearance of novel behavioral patterns in the habituated chimpanzees of Mahale : a review
- Memories of Nishida-san
- When dose play panting occur during social play in wild chimpanzees?
- Playful Drumming by Immature Wild Chimpanzees at Mahale: Do They Enjoy Making Sounds?
- Ranging behavior of Mahale chimpanzees: a 16 year study.
- Use of Leaf-sponge and Leaf-spoon by Juvenile Chimpanzees at Mahale
- Dermatophytosis of M group Chimpanzees, Mahale Mountains, Tanzania
- Exploratory-threat behaviors in wild chimpanzees encountering a porcupine