Abstract

Until recently, it has been believed that only one cetacean species of the genus Berardius, the Baird’s beaked whale (Berardius bairdii Stejneger, 1883), inhabits the northern Pacific Ocean. However, a genetic analysis of tissue samples and morphometric data provide convincing evidence for the existence of a previously undescribed Berardius species sympatric to Baird’s beaked whale, which is referred to as “black” beaked whale. The high probability of occurrence of the black beaked whale in Russian waters is established and its possible range is described in the present study. A genetic analysis of the mitochondrial DNA control region was carried out for 28 new specimens of the genus Berardius from four Far Eastern regions. According to the results, all specimens from the Commander Islands and Kamchatka Gulf belonged to the phylogroup of the Baird’s beaked whale. Of the two dead animals stranded on the Kunashir Island coast, one was identified as Baird’s beaked whale and the other as black beaked whale. Another two black beaked whales were found on the eastern coast of Sakhalin Island. These are the first records of the new Berardius species from the Russian territory confirmed by genetic analysis.

中文翻译：

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俄罗斯水域贝拉迪乌斯属鲸类一新种的记录

摘要

直到最近，人们一直认为，只有北半球贝纳德斯的喙鲸Berardius属一种鲸类（Berardius bairdii Stejneger，1883年）生活在北太平洋。但是，组织样本的遗传分析和形态计量数据为说服Baiard喙鲸的先前未描述的Berardius物种的存在提供了令人信服的证据，这被称为“黑”喙鲸。建立了在俄罗斯水域发生黑喙鲸的可能性很高，并且在本研究中描述了其可能的范围。对28个Berardius属的新标本进行了线粒体DNA控制区的遗传分析来自四个远东地区。根据结果​​，来自指挥官群岛和堪察加半岛海湾的所有标本均属于贝尔德喙鲸的类群。在困在库纳什尔岛沿岸的两只死动物中，一只被确定为贝尔德的喙鲸，另一只被确定为黑喙鲸。在萨哈林岛的东海岸发现了另外两只黑喙鲸。这些是通过遗传分析证实的来自俄罗斯领土的Berardius新物种的第一批记录。