Gummivory in Cheirogaleids: Primitive Retention or Adaptation to Hypervariable Environments?
Gummivory in Cheirogaleids: Primitive Retention or Adaptation to Hypervariable Environments?
复制标题
Cheirogaleids 中的口香糖：原始保留还是对高变环境的适应？
DOI：
10.1007/978-1-4419-6661-2_6
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发表时间：
2010
影响因子：
2.4
通讯作者：
J. Ganzhorn
中科院分区：
文献类型：
--
作者：
F. Génin;J. Masters;J. Ganzhorn
除了专门的食胶动物外，食胶动物通常被视为一种后备饮食;当其他食物不可用时，动物被迫食用口香糖。我们提出了另一种解释，cheirogaleid gummivory是一种适应高变环境。首先，我们比较了形态适应gummivory表现出的手齿鲸和其他gummivorous灵长类动物。尽管趋同的趋势，适应gummivory是相当可变的。第二，在马达加斯加南部高度可变的旱生林中对红灰色鼠狐猴Microcebus griseorufus进行的长期实地研究表明，该物种是所有已知鼠狐猴中最专门的食胶动物。第三，比较了M. griseorufus表明这两种食物的营养成分相当。M.食用的口香糖griseorufus全年都在渗出，增加了对高度可变生境中食物供应的可预测性，而水果供应表现出很高的年内和年际变化。最后，我们比较了食胶哺乳动物的全球分布与厄尔尼诺相关的干旱地区的地图，这表明了一个强烈的一致性食胶动物和超变。
Gummivory in cheirogaleids, apart from the specialist gummivore Phaner, is often viewed as a fall-back diet; animals are forced to consume gums when other foods are unavailable. We propose an alternative explanation that cheirogaleid gummivory is an adaptation to hypervariable environments. First, we compared morphological adaptations to gummivory evinced by cheirogaleids and other gummivorous primates. Despite convergent trends, adaptations to gummivory are quite variable. Second, a long-term field study of the reddish-grey mouse lemur, Microcebus griseorufus, in the highly variable xerophytic forest of southern Madagascar reveals this species to be the most specialized gummivore of all known mouse lemurs. Third, a comparison of the nutritional composition of gums and fruits consumed by M. griseorufus shows these two food types to be of equivalent nutritive content. Gums consumed by M. griseorufus are exuded all year round, increasing the predictability of food availability in a hypervariable habitat, while fruit availability exhibits high intra- and inter-annual variation. Finally, we compared the global distributions of gummivorous mammals with a map of the regions subject to El Nino-related droughts, which indicated a strong congruence between gummivory and hypervariability.