Noninvasive age estimation for wild Indo‐Pacific bottlenose dolphins (Tursiops aduncus) using speckle appearance based on quantification‐theory model I analysis
Noninvasive age estimation for wild Indo‐Pacific bottlenose dolphins (Tursiops aduncus) using speckle appearance based on quantification‐theory model I analysis
复制标题
基于量化理论模型 I 分析，利用斑点外观对野生印度太平洋宽吻海豚 (Tursiops aduncus) 进行无创年龄估计
DOI：
10.1111/mms.12999
复制
发表时间：
2023
影响因子：
2.3
通讯作者：
Sakai Mai
中科院分区：
文献类型：
--
作者：
Yagi Genfu;Kogi Kazunobu;Sakai Mai
年龄是生态学和种群动态研究的一个重要参数。目前估计鲸目动物年龄的方法一般涉及侵入性或死后技术。它们不适合数量较少的野生海洋哺乳动物。我们之前的研究表明，在印度太平洋海豚中，身体斑点的数量和大小都随着年龄的增长而增加。我们使用水下视频数据观察了41名已知年龄的个体（28名女性和13名男性），年龄在7岁至25岁之间。个体的年龄是从1994年以来的长期身份调查中获得的。在这里，我们使用量化理论I型分析创建了一个年龄估计模型。该模型从斑点观测准确地估计了年龄（R2=0.77，标准差为2.58岁）。我们澄清了三仓岛附近89个个体的年龄（139个未知年龄个体的64%）。这是第一项使用非侵入性年龄估计方法来统计验证其准确性并揭示大多数人口年龄的研究。
Age is an important parameter for the study of ecology and population dynamics. Current methodologies for age estimation in cetaceans generally involve invasive or postmortem techniques. They are not suitable for wild marine mammals with small populations. Our previous study shows that in Indo‐Pacific bottlenose dolphins, both the number and size of body speckles increase with age. We observed speckles of 41 known‐age individuals (28 females and 13 males) between the ages of 7 and 25 years using underwater video data. The ages of individuals were obtained from a long‐term identification survey since 1994. Here, we created an age‐estimation model using quantification theory type I analysis. The model estimated the age accurately from speckle observation (R2=0.77, standard deviation of 2.58 years). We clarified the age of 89 individuals (64% of 139 unknown age individuals) near Mikura Island. This is the first study to use a noninvasive age estimation method to statistically verify its accuracy and revealed the age of the majority of the population.