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首页> 外文期刊>Marine biology >Cryptic invasion of northeast Pacific estuaries by the Asian polychaete, Hediste diadroma (Nereididae)
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Cryptic invasion of northeast Pacific estuaries by the Asian polychaete, Hediste diadroma (Nereididae)

机译：亚洲多毛chaHediste diadroma（Nereididae）对东北太平洋河口的秘密入侵

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摘要

The estuarine polychaete, Hediste diadroma (Nereididae), of eastern Asia was found at all six sites sampled in October 2009 in northeast Pacific estuaries, including the Columbia River, along a 300-km stretch of coastline in Washington and Oregon, USA. The immature worms were returned to the laboratory in Japan where 13 of them were cultured to sexual maturity after 5-7 months. These worms had the diagnostic, epitoke-specific spinigers that distinguish H. diadroma from all other Hediste species. Their egg sizes (140-170 μm), paragnath numbers on the proboscis, and chromosome number (2n = 28) were also consistent with those previously reported for the Japanese population of H. diadroma. The widespread distribution of H. diadroma indicates that it is a successful invader of the North American Pacific and it may have long escaped detection because of its morphological similarity to the native species, H. limnicola. The long pelagic life of H. diadroma larvae could have facilitated its successful trans-ocean dispersal with ballast water of ships.
机译：2009年10月，在东北哥伦比亚河口，包括哥伦比亚河，在华盛顿和俄勒冈州300公里的海岸线上采样的全部六个地点，发现了东亚的河口杂种动物Hediste diadroma（Nereididae）。未成熟的蠕虫被送回日本的实验室，在5-7个月后将其中的13种进行了性成熟培养。这些蠕虫具有诊断性的，特定于触角的小蜘蛛，可将菱形嗜血杆菌与所有其他赫迪斯物种区分。它们的卵大小（140-170μm），长吻上的副颌节数和染色体数（2n = 28）也与先前报道的日本腹泻嗜血杆菌的一致。腹泻嗜血杆菌的广泛分布表明它是北美太平洋的成功入侵者，并且由于其形态与本地物种嗜血杆菌（H. limnicola）相似，因此可能早已被逃脱了检测。腹泻H. diadroma幼虫的长上浮寿命可能促进了其与船舶压载水的成功跨洋扩散。

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  • 来源
    《Marine biology》 |2014年第1期|187-194|共8页
  • 作者

    Ryogo Nishizawa; Masanori Sato; Toshio Furota; Hiroaki Tosuji;

  • 作者单位

    Department of Earth and Environmental Sciences, Graduate School of Science and Engineering, Kagoshima University, Kagoshima, Japan;

    Department of Earth and Environmental Sciences, Graduate School of Science and Engineering, Kagoshima University, Kagoshima, Japan;

    Department of Environmental Science, Faculty of Science, Toho University, Funabashi, Japan;

    Department of Chemistry and Bioscience, Graduate School of Science and Engineering, Kagoshima University, Kagoshima, Japan;

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