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首页> 外文期刊>Marine biology >Third-stage larva shifts host fish from teleost to elasmobranch in the temporary parasitic isopod, Gnathia trimaculata (Crustacea; Gnathiidae)
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Third-stage larva shifts host fish from teleost to elasmobranch in the temporary parasitic isopod, Gnathia trimaculata (Crustacea; Gnathiidae)

机译：第三阶段的幼虫将寄主鱼从硬骨鱼转移到临时寄生的异足动物Gnathia trimaculata（甲壳纲； Gnathiidae）中的弹s。

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摘要

The life cycle of the fish ectoparasitic isopod Gnathia trimaculata is described based on both field samplings and laboratory observations. Species identification of the larvae was based on morphological observation and supported by molecular analysis. As the results of field samplings in several sites of southwestern and central Japan (24-34°N, 124-139°E) from 2005-2011, approximately 900 third-stage larvae of G. trimaculata were found on 25 elasmobranch species, and 220 first- and second-stage larvae were found on three teleost species. No third-stage larvae were found on the teleosts, and the larvae of younger stages never infested elasmobranchs. Therefore, G. trimaculata is supposed to shift its host from teleosts to elasmobranchs as it develops. We discuss the developmental periods, life span, distribution, and predation risk of the present species compared with other gnathiid species.
机译：基于田间采样和实验室观察，描述了鱼类外寄生等足类Gnathia trimaculata的生命周期。幼虫的种类鉴定是基于形态学观察并得到分子分析的支持。根据2005年至2011年在日本西南部和中部（24-34°N，124-139°E）几个地点的田间采样结果，在25个弹枝科物种中发现了约900个三生线虫的第三阶段幼虫，并且在三个硬骨鱼类中发现了220个第一和第二阶段的幼虫。在硬骨鱼上没有发现第三阶段的幼虫，年轻阶段的幼虫也从未感染过弹性s。因此，随着生长，G。trimaculata应该将其寄主从硬骨鱼转移到弹枝。我们讨论了当前物种与其他啮齿类物种相比的发育时期，寿命，分布和捕食风险。

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  • 来源
    《Marine biology》 |2012年第10期|p.2333-2347|共15页
  • 作者

    Yuzo Ota; Osamu Hoshino; Mamiko Hirose; Katsuhiko Tanaka; Euichi Hirose;

  • 作者单位

    Graduate School of Biosphere Science, Hiroshima University, 1 -3-2 Kagamiyama, Higashi-Hiroshima 739-8511, Japan;

    Graduate School of Engineering and Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan;

    Graduate School of Engineering and Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan;

    Global Oceanographic Data Center, Japan Agency for Marine-Earth Science and Technology, Toyohara, Nago, Okinawa 905-2172, Japan;

    Faculty of Science, University of the Ryukyus, Nishihara,Okinawa 903-0213, Japan;

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