Skull morphology of bottlenose dolphins from different ocean populations with emphasis on South America,Journal of Morphology

当前位置： X-MOL 学术 › J. Morphol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Skull morphology of bottlenose dolphins from different ocean populations with emphasis on South America
Journal of Morphology ( IF 1.5 ) Pub Date : 2020-04-06 , DOI: 10.1002/jmor.21121
Leandro S L Hohl _{1,

2} , Fernando L Sicuro ₃ , Janaína C Wickert _{4,

5} , Ignacio B Moreno _{5,

6} , Oscar Rocha-Barbosa _{1,

2} , André S Barreto ₇

Affiliation

The bottlenose dolphin, genus Tursiops, is cosmopolitan occurring in tropical and temperate regions, with morphological variation between and within different oceans. Since the genus' taxonomy has been under discussion for a long time, this work aimed at analyzing the cranial variability of T. truncatus from different regions of the world. Geometric Morphometrics analyses were performed in 201 skulls of adult specimens, on dorsal, ventral, and lateral views, from the Eastern North Pacific, Eastern North Atlantic, Eastern South Atlantic, and Western South Atlantic oceans. The results indicate differences between individuals that inhabit the Atlantic and Pacific oceans. Within the Atlantic Ocean, there is an evident longitudinal differentiation of specimens from the eastern and western regions. A latitudinal separation was also observed, considering specimens from the North and South Atlantic Ocean. In the Western South Atlantic statistical differences were found between two morphological groups, identified as T. gephyreus (sensu Lahille, 1908) and T. truncatus, and the cross‐validation presented 98% as minimum confidence for correct classification of these two groups. The present study provides strong morphological support to consider these two lineages as separate species.

中文翻译：

来自不同海洋种群的宽吻海豚的头骨形态，重点是南美洲

宽吻海豚，属 Tursiops，是世界性的，分布在热带和温带地区，在不同海洋之间和内部具有形态变化。由于该属的分类学已经讨论了很长时间，这项工作旨在分析来自世界不同地区的 T. truncatus 的颅骨变异。对来自北太平洋东部、北大西洋东部、南大西洋东部和南大西洋西部的 201 个成人标本的头骨进行了几何形态测量分析，在背侧、腹侧和侧视图上。结果表明居住在大西洋和太平洋的个体之间存在差异。在大西洋内部，东西部地区的标本存在明显的纵向差异。还观察到横向分离，考虑来自北大西洋和南大西洋的标本。在西南大西洋发现两个形态组之间的统计差异，确定为 T. gephyreus (sensu Lahille, 1908) 和 T. truncatus，交叉验证显示 98% 作为正确分类这两个组的最低置信度。本研究为将这两个谱系视为单独的物种提供了强有力的形态学支持。

更新日期：2020-04-06

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11