In vivo deciduous dental eruption in LuiKotale bonobos and Gombe chimpanzees
In vivo deciduous dental eruption in LuiKotale bonobos and Gombe chimpanzees
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LuiKotale倭黑猩猩和贡贝黑猩猩的体内乳牙萌出
DOI：
10.1002/ajpa.24376
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发表时间：
2021
影响因子：
2.8
通讯作者：
Lee, Kevin C.
中科院分区：
文献类型：
--
作者：
Lee, Sean M.;Sutherland, L. J.;Fruth, Barbara;Murray, Carson M.;Lonsdorf, Elizabeth V.;Arbenz‐Smith, Keely;Augusto, Rafael;Brogan, Sean;Canington, Stephanie L.;Lee, Kevin C.
目的关于倭黑猩猩和黑猩猩牙齿萌出时间的现有数据主要来自圈养个体或已故野生个体。然而，对活体野生猿类进行无创摄影监测的最新进展使研究人员能够在自然条件下描述相对健康个体的牙萌出特征。目前，此类数据仅适用于一组野生黑猩猩。我们报告了更多野生黑猩猩种群的数据以及野生倭黑猩猩的首次牙齿萌出数据。材料和方法我们分别收集了来自刚果民主共和国 LuiKotale 和坦桑尼亚贡贝国家公园的已知年龄的野生倭黑猩猩和东非黑猩猩张开嘴的牙齿照片和视频片段。我们从照片和视频片段中对乳牙的存在和不存在进行评分，以表征这两个群体的乳牙萌出时间。结果我们样本中的乳牙萌出年龄落在先前记录的圈养黑猩猩的变异范围内，但野生环境中的乳牙萌出年龄晚于圈养环境中。我们发现乳齿犬的萌发时间存在很大差异，尤其是倭黑猩猩。一只倭黑猩猩在 227 天时就有了乳牙，而另一只倭黑猩猩则在 477 天时没有乳牙。讨论我们的数据表明，野生个体的乳牙萌出晚于圈养个体。我们还发现，我们研究人群中的个体之间乳牙萌出时间存在很大差异，这一模式与之前的研究一致。随着更多数据的出现，未来的研究应该考虑乳齿犬萌发时间的变异来源以及与生活史其他方面的关系。
ObjectivesExisting data on bonobo and chimpanzee dental eruption timing are derived predominantly from captive individuals or deceased wild individuals. However, recent advances in noninvasive photographic monitoring of living, wild apes have enabled researchers to characterize dental eruption in relatively healthy individuals under naturalistic conditions. At present, such data are available for only one population of wild chimpanzees. We report data for an additional population of wild chimpanzees and the first dental eruption data for wild bonobos.Materials and MethodsWe collected photographs and video footage of teeth from the open mouths of wild bonobos and East African chimpanzees of known age from LuiKotale, Democratic Republic of the Congo, and Gombe National Park, Tanzania, respectively. We scored the presence and absence of deciduous teeth from photographs and video footage to characterize deciduous dental eruption timing in these two populations.ResultsDeciduous dental eruption ages in our sample fall within the range of variation previously documented for captive chimpanzees, but eruption ages are later in wild than in captive contexts. We found substantial variation in deciduous canine eruption timing, particularly among bonobos. One bonobo had a deciduous canine present by 227 days old while another did not have a deciduous canine present at 477 days old.DiscussionOur data indicate that deciduous teeth erupt later in wild individuals than in captive individuals. We also found that deciduous dental eruption timing varies considerably between individuals within our study populations, a pattern that is consistent with previous studies. Future studies should consider sources of variation in deciduous canine eruption timing and relationships with other aspects of life history as additional data become available.
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