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A newly discovered species of living baleen whale

机译:一种新发现的活头鲸

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摘要

In the late 1970s eight Balaenoptera specimens of unknown identity were caught in the lower latitudinal Indo-Pacific waters by Japanese research whaling vessels. The combination of the allozyme patterns and physical maturity of the eight specimens separated them from all acknowledged Balaenoptera species. In September 1998 we collected a medium-sized baleen whale carcass on a coastal island in the Sea of Japan. This specimen j and the previously collected eight specimens resembled Balaenoptera physalus (fin whale) in external appearance but were much smaller. Comparison of external morphology, osteology and mitochondrial DNA data grouped the nine specimens as a single species but separated them from all known baleen whale species. Therefore, here we describe a new species of Balaenoptera, which is characterized by its unique cranial morphology, its small number of baleen plates, and by its distant molecular relationships with all of its congeners. Our analyses also separated Balaenoptera brydei (Bryde's whale) and Balaenoptera edeni (Eden's whale) into two distinct species, raising the number of known living Balaenoptera species to eight.
机译:1970年代后期,日本研究捕鲸船在低纬度的印度洋-太平洋水域中捕获了八只身份不明的Balaenoptera标本。八种标本的同工酶模式和物理成熟度相结合,将它们与所有公认的古翅目物种隔离开来。 1998年9月,我们在日本海的一个沿海岛屿上收集了一只中型鲸鱼尸体。该标本j和先前收集的8个标本在外观上类似于鳞翅目(Balaenoptera physalus)(鳍鲸),但小得多。外部形态,骨学和线粒体DNA数据的比较将9个标本归为一个物种,但将它们与所有已知的古鲸物种分开。因此,在这里,我们描述了一种新的龟头目,其特征是其独特的颅骨形态,少量的龟头板以及与所有同类物的遥远分子关系。我们的分析也将Balaenoptera brydei(布莱德鲸)和Balaenoptera edeni(伊甸鲸)分为两个不同的物种,使已知的活的Balaenoptera物种数量增加到八个。

著录项

  • 来源
    《Nature》 |2003年第6964期|p.278-281|共4页
  • 作者单位

    National Research Institute of Fisheries Science, Fisheries Research Agency, 2-12-4 Fukuura, Kanazawa-ku, Yokohama, 236-8648, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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