Comparison of energy balance between two different-sized groups of Japanese macaques (Macaca fuscata yakui)
Comparison of energy balance between two different-sized groups of Japanese macaques (Macaca fuscata yakui)
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DOI：
10.1007/s10329-017-0607-x
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发表时间：
2017-04
期刊：
影响因子：
1.7
通讯作者：
Yosuke Kurihara;G. Hanya
中科院分区：
文献类型：
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作者：
Yosuke Kurihara;G. Hanya
量化能量平衡对于检验社会生态模型至关重要。为了从取食竞争的角度揭示日本猕猴群体生活的成本和收益，Kurihara和Hanya （Am J Primatol 77:986-1000, 2015）之前比较了日本屋久岛沿海森林中两个不同大小的猕猴群体（大群体30-35只；小群体13-15只）的取食行为。结果表明，由于群体内的争夺竞争，较大的群体表现出更大的觅食努力，而较小的群体遭受更高的旅行成本，可能是由于群体间的竞争。然而，目前尚不清楚行为差异是否会影响他们的能量预算。本研究考察了两组不同摄食行为对能量的影响。利用10至13名成年女性的行为数据和食物的营养成分，我们比较了两组之间的摄取率、饮食的能量/营养含量和能量预算。两组之间的摄食率和能量/营养含量没有差异。尽管大组的摄食努力更高，但两组之间的能量摄取量没有差异。两组之间的能量消耗没有差异，因为在较小的组中，较高的旅行成本被较低的进食努力所抵消。因此，两组之间的能量平衡没有差异。我们证明了摄食竞争的行为措施并没有转化为它们的能量状况；此外，我们的研究结果再次强调了量化行为和适合度测量对于正确解释摄食行为变化的重要性。
Quantifying the energy balance is essential for testing socio-ecological models. To reveal costs and benefits of group living in Japanese macaques from the perspective of feeding competition, Kurihara and Hanya (Am J Primatol 77:986–1000, 2015) previously compared feeding behavior between two different-sized groups of macaques (larger group 30–35 individuals; smaller group 13–15 individuals) in the coastal forest of Yakushima, Japan. The results suggested that the larger group exhibited greater feeding effort because of intragroup scramble competition and that the smaller group suffered from higher travel costs, possibly owing to intergroup contest competition. However, it remained unclear whether the behavioral differences affected their energy budgets. The present study examined energetic consequences of the different feeding behaviors in the two groups. Using behavioral data from 10 to 13 adult females and nutritional composition of food items, we compared ingestion rates, energetic/nutritional content of diet, and energy budgets between the two groups. Ingestion rates and energetic/nutritional content of diet did not differ between the two groups. Despite the higher feeding effort of the larger group, energy intake did not differ between the two groups. Energy expenditure did not differ between the two groups because higher travel costs were negated by lower feeding effort in the smaller group. Consequently, the energy balance did not differ between the two groups. We demonstrated that the behavioral measures of feeding competition were not translated into their energetic condition; moreover, our findings re-emphasize the importance of quantifying behavioral and fitness measures for interpreting variation in feeding behavior properly.