Monthly and diurnal variations in food choice by Macaca fuscata yakui during the major fruiting season at Yakushima Island, Japan

被引:3
作者
Domingo-Roura, X
Yamagiwa, J
机构
[1] Kyoto Univ, Fac Sci, Human Evolut Studies Lab, Sakyo Ku, Kyoto 6068502, Japan
[2] Univ Oxford, Dept Zool, Wildlife Conservat Res Unit, Oxford OX1 3PS, England
关键词
Macaca fuscata yakui; diurnal variation; protein; food choice; nutrition;
D O I
10.1007/BF02557588
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
An ecological survey was conducted on two groups of wild Japanese macaques (Macaca fuscata yakui) inhabiting the warm-temperate, broad-leaved forest of Yakushima Island. The survey was designed to determine and explain monthly and diurnal variations in both duration of feeding and food choice, and to explain these variations from a nutritional perspective. Feeding activity increased during the hour before sunset, while leaf eating in particular tended to be observed later in the day throughout the study period. A diverse and unstable diet promoted monthly differences in fat and protein consumption. The mean lipid and calorific content of the food and the rate of protein intake were high in early autumn. Ficus fruits were not selected when unripe Ardisia sieboldii fruits were available, but were an important food resource in a general context. Differences in nutritional intake at different rimes of the day were determined by the combination of species eaten although no single species was preferred at a particular time. Similarities with experimental results in laboratory animals suggest that a physiological, rather than a behavioural, response was regulating nutritional intake. A high consumption of proteins before rest might produce satiety in the macaques and give them the opportunity to digest and absorb complicated or toxic metabolites slowly during the night.
引用
收藏
页码:525 / 536
页数:12
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