Variation in Dental Wear and Tooth Loss Among Known-Aged, Older Ring-Tailed Lemurs (Lemur catta): A Comparison Between Wild and Captive Individuals
Variation in Dental Wear and Tooth Loss Among Known-Aged, Older Ring-Tailed Lemurs (Lemur catta): A Comparison Between Wild and Captive Individuals
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DOI：
10.1002/ajp.20846
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发表时间：
2010-11-01
影响因子：
2.4
通讯作者：
Lent, Cheryl
中科院分区：
文献类型：
--
作者：
Cuozzo, Frank P.;Sauther, Michelle L.;Lent, Cheryl
牙齿磨损通常是一种与年龄有关的现象，通常被认为在灵长类动物和其他哺乳动物种群中以相似的速度发生，并被认为是野生狐猴后代存活率降低的相关因素。很少有长期的野外研究将灵长类动物行为和生态学的详细研究与牙齿分析结合起来。在这里，我们提供了老年（> 10岁）野生和圈养环尾狐猴（狐猴卡塔）牙齿磨损和牙齿脱落的数据。在马达加斯加Beza Mahafaly特别保护区（BMSR）的老年环尾狐猴中（n=6），严重的牙齿磨损和牙齿脱落的比例从6%到50%不等。在这六个人中，年龄最大（19岁）的牙齿脱落频率第二低（14%）。印第安纳波利斯动物园的大多数圈养狐猴（n=7）的年龄比最老的BMSR狐猴，但显示显着减少整体牙齿磨损的36个牙齿位置中的19个，只有两个人表现出死前牙齿脱落。在圈养的狐猴中，只有一只狐猴（一只近29岁的雄性）失去了一颗以上的牙齿。这个个体只缺少前牙，与BMSR的狐猴相反，那里大部分失去的牙齿是与加工特定后备食物有关的犬齿。后犬齿也显示出显着更多的整体磨损在BMSR比圈养样本。在BMSR，严重磨损和牙齿脱落的程度在相同年龄的老年人中各不相同，这可能反映了微生境的差异，从而反映了不同食物的可用性和使用。这种模式在“老年”之前变得明显，如在7岁的个体中所见。在BMSR的四只“年长”雌性狐猴中，严重磨损和/或牙齿脱落并不能预测后代的存活率。Am. J. Primatol. 72：1026-1037，2010. (C)2010 Wiley-Liss，Inc.
Tooth wear is generally an age-related phenomenon, often assumed to occur at similar rates within populations of primates and other mammals, and has been suggested as a correlate of reduced offspring survival among wild lemurs. Few long-term wild studies have combined detailed study of primate behavior and ecology with dental analyses. Here, we present data on dental wear and tooth loss in older (> 10 years old) wild and captive ring-tailed lemurs (Lemur catta). Among older ring-tailed lemurs at the Beza Mahafaly Special Reserve (BMSR), Madagascar (n=6), the percentage of severe dental wear and tooth loss ranges from 6 to 50%. Among these six individuals, the oldest (19 years old) exhibits the second lowest frequency of tooth loss (14%). The majority of captive lemurs at the Indianapolis Zoo (n=7) are older than the oldest BMSR lemur, yet display significantly less overall tooth wear for 19 of 36 tooth positions, with only two individuals exhibiting antemortem tooth loss. Among the captive lemurs, only one lemur (a nearly 29 year old male) has lost more than one tooth. This individual is only missing anterior teeth, in contrast to lemurs at BMSR, where the majority of lost teeth are postcanine teeth associated with processing specific fallback foods. Postcanine teeth also show significantly more overall wear at BMSR than in the captive sample. At BMSR, degree of severe wear and tooth loss varies in same aged, older individuals, likely reflecting differences in microhabitat, and thus the availability and use of different foods. This pattern becomes apparent before "old age," as seen in individuals as young as 7 years. Among the four "older" female lemurs at BMSR, severe wear and/or tooth loss do not predict offspring survival. Am. J. Primatol. 72:1026-1037, 2010. (C) 2010 Wiley-Liss, Inc.