HARDNESS AS A BASIS OF FRUIT CHOICE IN 2 SYMPATRIC PRIMATES
HARDNESS AS A BASIS OF FRUIT CHOICE IN 2 SYMPATRIC PRIMATES
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DOI：
10.1002/ajpa.1330810103
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发表时间：
1990-01-01
影响因子：
2.8
通讯作者：
NORCONK, MA
中科院分区：
文献类型：
--
作者：
KINZEY, WG;NORCONK, MA
果实的颜色和大小是哺乳动物和鸟类食物选择的重要决定因素，但在哺乳动物觅食行为的研究中，果实和种子的硬度和重要物理性质通常被忽视为食物选择的决定因素。两种方法被用来确定水果硬度在实地研究的两个同域灵长类动物，黑蜘蛛猴（Ateles paniscus）和胡子萨基猴（Chiropotes satanas）在马那瓜。我们测定了果皮的抗穿刺性和种子的抗压碎性。一些被Chiropotes打开的果实的果皮的抗穿刺性比所有被Ateles成功打开的果实的抗穿刺性大15倍。相比之下，被Chiropotes咀嚼的种子的抗压碎性显著低于被Ateles吞咽的种子。这些数据表明，果皮和种子的硬度可能在同域脊椎动物的食物选择中起着重要的作用。 测量果皮的抗穿刺性和种子的抗压碎性对于理解这些灵长类动物果实硬度的意义是必要的。
Fruit color and size are significant determinants of food choice in mammals and birds, but hardness, and important physical property of fruit and seeds, has generally been overlooked as a determinant of food choice in studies of mammalian foraging behavior. Two methods were used to determine fruit hardness during a field study of two sympatric primates, the black spider monkey (Ateles paniscus) and the bearded saki monkey (Chiropotes satanas) in Surinam. We measured both puncture resistance of fruit pericarp and crushing resistance of seeds. Puncture resistance of the pericarp of some fruit opened by Chiropotes was as much as 15 times greater than that of all fruit successfully opened by Ateles. In contrast, crushing resistance of species of seeds masticated by Chiropotes was significantly lower than that of seeds swallowed by Ateles. These data demonstrate that hardness of both fruit pericarp and seed may play a significant role in food choice among sympatric vertebrates. Measurements of both puncture resistance of the pericarp and crushing resistance of the seed are necessary for understanding the significance of fruit hardness in these primates.