Uehara S, Nishida T
Am J Phys Anthropol. 1987 Mar;72(3):315-21. doi: 10.1002/ajpa.1330720305.
Ten male and nine female habituated chimpanzees (Pan troglodytes schweinfurthii) in the Kasoje area of the Mahale Mountains National Park, Tanzania, were weighed intermittently between December 1973 and March 1980 by luring them up a rope hung on a spring balance: six adult males averaged 42.0 kg and eight adult females 35.2 kg. Seasonal change in body weight was recognized at least partially; body weights tended to decrease in the later part of the wet season presumably because of food shortage in the middle of the wet season. Comparison of body weight among three populations of the same subspecies suggests that adult female chimpanzees of Mahale appear to be heavier than those of the Gombe National Park, Tanzania, and that they seem to be similar to the forest-living counterparts of eastern Zaire. On the other hand, body weights of adult male chimpanzees from the three populations do not show significant differences. Perhaps feeding competition among adult females in a small, isolated habitat is more severe than that among adult males, which may result in the body weight reduction among adult female chimpanzees at Gombe.
1973年12月至1980年3月期间，对坦桑尼亚马哈尔山国家公园卡索杰地区的10只成年雄性和9只成年雌性黑猩猩（Pan troglodytes schweinfurthii）进行了间歇性称重，方法是引诱它们爬上挂在弹簧秤上的绳索：6只成年雄性平均体重为42.0千克，8只成年雌性平均体重为35.2千克。至少部分地观察到了体重的季节性变化；在雨季后期体重往往会下降，推测这是因为雨季中期食物短缺。对同一亚种的三个种群的体重进行比较表明，马哈尔山的成年雌性黑猩猩似乎比坦桑尼亚贡贝国家公园的成年雌性黑猩猩更重，并且它们似乎与扎伊尔东部生活在森林中的同类黑猩猩体重相似。另一方面，来自这三个种群的成年雄性黑猩猩的体重没有显著差异。也许在一个小而孤立的栖息地中，成年雌性之间的食物竞争比成年雄性之间更激烈，这可能导致贡贝的成年雌性黑猩猩体重下降。
