Sociology of the feeding strategy of Japanese monkeys

日本猴子饲养策略的社会学

• 批准号: 61540474
• 负责人: SUGIYAMA Yukimaru
• 金额: $ 0.96万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61540474/
• 关键词: Japanese monkeys; population parameters; population growth rate; social structure; reproductive success; feeding strategy; 個体群成長; 繁殖効率; 採食生態; 採食速度; 採食空間; 採食時の個体間関係

In order to re-examine social behavior of Japanese monkeys in relation to the feeding strategy, studies were conducted at Kinkasan, Takasakiyama, Koshima, and Ryozenyama.1. The monkeys of the Kinkasan troop increased number of food patches to visit in a day, and expanded the duration of feeding time against the food shortage in winter. However, difference was not found for these activities depending on the difference of dominance rank.2. Population parameters of Takasakiyama troops remarkably decreased since 1975 when artificial food supply have been much reduced. This fact shows that food intake directly affects reproductive succes of monkeys. The amount of intake of artificial food showed difference for difference of dominance rank among matri-lines, and females of higher rank showed high reproductive success than those of lower rank. However, the preliminary results showed no difference of the amount of food intake in the forest depending on rank difference.3. Artificial food supply … More for the Koshima troop is reduced minimally, only for the facilitation of observation. The longitudinal change of dominance rank among females was examined in relation to their reproductive success, which was low for lower ranking females among the highest matri-line. The reason for their low reproductive success was analyzed. That is, they were frequently attacked in aggressive interactins, or they showed most unstable dominance rank; they showed drastic drop of dominance rank and high mortality rate after drop of rank. The difference of rank strongly affected their social attitude and their feeding strategy.4. The reproductive success of Ryozenyama troop increased for lower ranking females after division of the mother troop into two, one consisting of higher ranking kins and the other lower ranking. The inferior feeding condition of lower kins must have changed to the same condition with that of the higher kins after the troop division.The present studies indicate that the difference of reproductive success depending on difference of dominance rank is much enhance in the artificial condition, and that it is much reduced in the natural condition. Less

为了重新审视与喂养策略相关的日本猴子的社会行为，研究人员在金三山、高崎山、小岛和龙曾山进行了研究。金卡三军团的猴子增加了一天中要访问的食物补丁的数量，并延长了进食时间，以应对冬季的食物短缺。然而，这些活动并没有因优势等级的不同而存在差异。自1975年以来，高崎山部队的人口参数显着下降，当时人工食物供应大幅减少。这一事实表明，食物摄入量直接影响猴子的繁殖成功。人工采食量随优势等级的不同而不同，高等级的雌性比低等级的雌性繁殖成功率高。然而，初步结果表明，森林摄食量并没有因等级差异而有所差异。人工食品供应…对于小岛部队来说，更多的是最小限度的减少，只是为了方便观察。研究了雌虫优势地位的纵向变化与其繁殖成功率的关系，在最高母系中，地位较低的雌虫繁殖成功率较低。分析了它们繁殖成功率低的原因。也就是说，它们在攻击性相互作用中经常受到攻击，或表现出最不稳定的优势度；它们在降级后表现出优势度的急剧下降和高死亡率。职级差异对其社会态度和喂养策略有较大影响。将母群一分为二后，较低等级的雌性Ryozenyama种群的繁殖成功率增加，一群由较高等级的亲本组成，另一群由较低等级的后代组成。低等亲的取食条件在分群后一定已经转变为与高级亲相同的条件。目前的研究表明，在人工条件下，取决于优势等级差异的繁殖成功率差异大大增强，而在自然条件下，这种差异则大大减小。较少

项目成果

杉山幸丸: 霊長類研究. 4. (1988)

杉山幸丸：灵长类动物研究。4.（1988）