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首页> 外文期刊>ICES Journal of Marine Science >Discrimination of wild and cultured Japanese eels based on otolith stable isotope ratios
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Discrimination of wild and cultured Japanese eels based on otolith stable isotope ratios

机译：基于耳石稳定同位素比率的野生和养殖鳗鱼的区分

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摘要

We successfully discriminated wild and cultured anguillid eels without artificial tagging. For the purpose of population restoration of anguillid eels, stocking has been widely conducted in the European Union (EU) and Japan, although the net benefits of stocking remain unclear. To evaluate the effectiveness of eel stocking for population restoration, the survival, growth, escapement, and reproduction of stocked eels should be tracked. In this study, we explored the potential of using otolith oxygen and carbon stable isotope ratios as a natural tag to discriminate between wild and cultured eels, because cultured eels are often stocked into natural rivers and lakes. A discrimination model was developed based on wild (n = 95) and cultured (n = 314) Japanese eels as a training dataset. The results of accuracy estimation based on leave-one-out cross-validation were 96.8%. We then tested the applicability of the model to stocked-recaptured eels (n = 20); 100.0% were successfully identified as cultured eels, indicating that these eels spend their early continental phase in aquaculture ponds before stocking. This method could be widely applied to assess the effectiveness of eel stocking by determining the proportion of stocked eels among those captured from rivers, coastal areas, or spawning grounds.
机译：我们成功地区分了野生鳗鱼和人工养殖鳗鱼，而没有人工标记。为了恢复鳗鱼的种群，尽管还没有明确养鱼的净收益，但是在欧盟和日本已经广泛进行了养鱼。为了评估鳗鱼放养对种群恢复的有效性，应跟踪鳗鱼的生存，生长，逃逸和繁殖。在这项研究中，我们探索了使用耳石氧气和碳稳定同位素比率作为自然标记来区分野生鳗鱼和人工养殖鳗鱼的潜力，因为人工养殖的​​鳗鱼通常存放在天然河流和湖泊中。基于野生（n = 95）和养殖（n = 314）日本鳗鱼作为训练数据集建立了判别模型。基于留一法交叉验证的准确性评估结果为96.8％。然后，我们测试了该模型对放养的鳗鱼的适用性（n = 20）； 100.0％被成功鉴定为养殖鳗鱼，表明这些鳗鱼在放养前在水产养殖池中度过了大陆早期。通过确定从河流，沿海地区或产卵场捕获的鳗鱼中所养鳗鱼的比例，该方法可以广泛地用于评估鳗鱼放养的有效性。

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  • 来源
    《ICES Journal of Marine Science》 |2018年第2期|719-726|共8页
  • 作者

    Kaifu Kenzo; Itakura Hikaru; Amano Yosuke; Shirai Kotaro; Yokouchi Kazuki; Wakiya Ryoshiro; Murakami-Sugihara Naoko; Washitani Izumi; Yada Takashi;

  • 作者单位

    Chuo Univ, Fac Law, 724-1 Higashinakano, Hachioji, Tokyo 1920393, Japan;

    Kobe Univ, Grad Sch Sci, Nada Ku, 1-1 Rokkoudaichou, Kobe, Hyogo 6578501, Japan;

    Japan Fisheries Res & Educ Agcy, Tohoku Natl Fisheries Res Inst, 3-27-5 Shinhama, Shiogama, Miyagi 9850001, Japan;

    Univ Tokyo, Atmosphere & Ocean Res Inst, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778564, Japan;

    Japan Fisheries Res & Educ Agcy, Natl Res Inst Fisheries Sci, Yokosuka, Kanagawa 2380316, Japan;

    Chuo Univ, Res & Dev Initiat, Bunkyo Ku, 1-13-27 Kasuga, Tokyo 1128551, Japan;

    Univ Tokyo, Atmosphere & Ocean Res Inst, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778564, Japan;

    Chuo Univ, Fac Sci & Engn, Bunkyo Ku, 1-13-27 Kasuga, Tokyo 1128551, Japan;

    Japan Fisheries Res & Educ Agcy, Natl Res Inst Fisheries Sci, Nikko, Tochigi 3211661, Japan;

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  • 关键词

    anguillid eel; conservation; otolith; stable isotope; stocking;

    机译：鳗鱼;保护;耳石;稳定同位素;放养;

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