Patterns of association among female Indo-Pacific bottlenose dolphins (Tursiops aduncus) in a population forming large groups
Patterns of association among female Indo-Pacific bottlenose dolphins (Tursiops aduncus) in a population forming large groups
复制标题
雌性印度太平洋宽吻海豚（Tursiops aduncus）在形成大群体的种群中的关联模式
作者：
Nishita;M.;Shirakihara;M.;Amano;M.
在日本天草岛附近的印度太平洋短吻海豚（Tursiops aduncus）形成了一个超过100只的大群体，这是这个种群的一个显着特征，比以前研究的短吻海豚要大得多。使用2012年收集的33天的照片识别数据，使用两种关联测量尺度（基于照片和基于组的关联）调查了70名女性之间的关联，以了解她们是否基于生殖状态进行关联，这通常在其他群体规模较小的人群中观察到。检测到相同生殖状态类别的女性与不同类别的女性之间的关联存在显着差异，一年内失去小牛的女性与同龄小牛的女性之间的关联减少。这表明，即使在一个群体规模大的人口，女性的生殖状况是影响他们的协会的因素之一。
Indo-Pacific bottlenose dolphins (Tursiops aduncus) around Amakusa-Shimoshima, Japan form large groups of >100 individuals, a remarkable feature of this population, which is much larger than previously studied bottlenose dolphins. Using photo-identification data collected on 33 days in 2012, associations among 70 females were investigated using two scales of association measure (photograph- and group-based association) to know whether they associate based on their reproductive status, as is typically observed in other populations with smaller group size. Significant differences in associations between females of the same reproductive status category and those in different categories were detected, and a female that lost her calf within a year decreased associations with females with calves of the same age. These suggests that even in a population with large group size, the reproductive status of females is one of the factors influencing their associations.