Selection of the Young Coconut Mesocarp by the Sulawesi Babirusa (Babyrousa celebensis)

IF 0.8 4区 生物学 Q3 ZOOLOGY Mammal Study Pub Date : 2021-06-02 DOI:10.3106/ms2020-0059
Masaaki Ito, A. Macdonald, K. Leus, Yamato Hasegawa, İ. Balık, I. W. G. Bandem Arimbawa, I. D. G. Agung Atmaja
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Abstract

Abstract. The feeding behaviours of the Sulawesi babirusa (Babyrousa celebensis) in terms of its preference to eat the mesocarp, or husk, of immature coconuts (Cocos nucifera) and the feeding marks on leftover coconuts were observed. Additionally, to explore the physicochemical factors behind this preference, a comparative study was conducted on the basal and apical parts of the coconut mesocarp. The breaking load, macronutrient content, and volatile compounds were examined. The findings were as follows: 1) Babirusas always sniffed the cut surface of the coconut before eating. They then scooped out the basal part of the mesocarp where the fibres are more visibly scarce with their mandibular incisors and ate more than 7.6 times the surface area at this end than at the apical end. 2) The preferred basal part of the immature mesocarp had a lower breaking load. 3) The gas chromatography-mass spectrophotometry (GC-MS) chromatogram of the basal sample showed larger peak areas for 2-methylbutanal and 3-methylbutanal. In conclusion, the babirusa preferred the basal part of the immature coconut mesocarp, and the preferred basal part had distinctive features in terms of hardness and volatile profile, which is probably characterised by the presence of 2-methylbutanal and 3-methylbutanal.
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苏拉威西岛Babirusa (Babyrousa celebensis)对幼椰子中果皮的选择
摘要本文观察了苏拉威西大腹虫(Babyrousa celebensis)偏爱吃未成熟椰子(Cocos nucifera)的中果皮或外壳的摄食行为,以及剩余椰子上的摄食痕迹。此外,为了探究这种偏好背后的物理化学因素,我们对椰子中果皮基部和顶部进行了比较研究。测定了断裂负荷、常量营养素含量和挥发性化合物。研究结果如下:1)Babirusas在吃椰子之前总是嗅一下切好的椰子表面。然后,他们挖出了中果皮的基部,那里的纤维与下颚门齿相比明显较少,他们吃掉了中果皮基部比中果皮顶端多7.6倍的表面积。2)未成熟中果皮基部的断裂负荷较低。3)基础样品的气相色谱-质谱(GC-MS)图谱显示2-甲基丁醛和3-甲基丁醛的峰面积较大。综上所述,巴比沙虫偏爱未成熟的椰子中果皮基部,偏爱的基部在硬度和挥发谱上具有明显的特征,其特征可能是2-甲基丁醛和3-甲基丁醛的存在。
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来源期刊
Mammal Study
Mammal Study ZOOLOGY-
CiteScore
1.70
自引率
20.00%
发文量
23
审稿时长
>12 weeks
期刊介绍: Mammal Study is the official journal of the Mammal Society of Japan. It publishes original articles, short communications, and reviews on all aspects of mammalogy quarterly, written in English.
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