评估Rangifer tarandus目前的视觉牙磨损年龄估计方法,使用来自加拿大的已知年龄样本
Grace Kohut1, Robert Losey1,2, Susan Kutz3
1Department of Anthropology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
PloS one
|April 2, 2024
概括
评估视觉牙磨损和喷发老化鹿 (Rangifer tarandus) 的方法至关重要. 这项研究发现,现有的方法具有可变的错误和偏见,特别是在老年人中,需要精细化以进行准确的人口研究.
科学领域:
- 古生态学 古生态学
- 野生动物生物学 野生动物生物学
- 动物园 考古学
背景情况:
- 动物种群的年龄估计对于生态和古生物学研究至关重要.
- 视觉牙磨损和喷发分析为老龄化动物提供了一种非破坏性的,易于使用的方法,甚至可以从照片中应用.
- 鹿 (Rangifer tarandus) 是一个广泛分布的物种,有几种基于牙的成熟老化方法.
研究的目的:
- 评估三种现有的视觉牙磨损和喷发老化方法的实用性和有效性.
- 根据使用的准确性,可解释性,用户友好性和特定的牙特征来评估这些方法.
- 确定 caribou 种群当前老化技术中的局限性和潜在偏差.
主要方法:
- 利用来自多个加拿大群体 (蓝鼻东,蓝鼻西,海豚联盟,Qamanirjuaq,贝弗利) 的已知年龄的大型鹿样本.
- 应用和分析了三种不同的视觉牙磨损和喷发老化方法.
- 通过将估计年龄与实际年龄进行比较,并注意到错误,偏见和适合不同年龄组的方法进行评估.
主要成果:
- 所有三种评估方法都在年龄估计中表现出可变错误和偏差.
- 其中两种方法在应用于较老的鹿个体时显示出显著的偏差.
- 在以前的方法开发中使用的特定牙样本和种群限制了它们对加拿大鹿的适用性.
结论:
- 现有的Rangifer tarandus视觉衰老方法需要改进,以提高准确性和减少偏差,特别是对于老年动物.
- 允许连续或离散年龄估计的方法对于人口分析来说比依赖年龄范围的方法更灵活.
- 进一步开发牙磨损和喷发衰老技术对于推进动物园考古学研究大鹿和鹿至关重要.
相关概念视频
02:48Radioactive Decay and Radiometric Dating
33.9K
Radioactivity is a spontaneous disintegration of an unstable nuclide and is a random process, as all the nuclei in the sample do not decay simultaneously. The number of disintegrations per unit time is called the activity (A), which is directly proportional to the number of nuclei in the sample. The decay constant (λ) is an average probability of decay per nucleus in unit time.
33.9K
01:15Teeth
406
The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
406