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首页> 外文期刊>日本水産学会誌 >Acoustic identification of krill and copepods using frequency differences of volume backscattering strength around Funka Bay, Hokkaido, Japan
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Acoustic identification of krill and copepods using frequency differences of volume backscattering strength around Funka Bay, Hokkaido, Japan

机译：利用北海道，日本北海道频率差异频率差异频率差异的磷虾和桡足类的声学识别

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摘要

In and around Funka Bay in southwest Hokkaido, Japan, krill and copepods are the dominant species of zooplankton. In this area, they are important prey for walleye pollock Gadus chalcogrammus and other marine animals. In this study, we examined the possibility of identifying krill and copepods based on diSerences in volume backscattering strength at different frequencies. Acoustic surveys were conducted in and around Funka Bay in March 2012 aboard the T/S Ushio-maru using a Simrad EK60 quantitative echo sounder. The acoustic data were collected at 38, 120 and 200 kHz. Biological samples were collected by a ring net with vertical towing. To identify the krill and copepods, diSerences in volume backscattering strength at three frequencies were examined. Krill and copepods showed stronger response at 120 and 200 kHz than at 38 kHz. The results showed that the diSerences in volume backscattering strength between 120 and 200 kHz (Delta SV200-120 kHz) were -1.5 to 1.3 dB for krill and 2.2-3.7 dB for copepods. Based on these diSerences between frequencies, we were able to identify krill and copepods.
机译：在北海道北海道，日本，克里尔和桡骨中的Funka Bay及其周边是浮游动物的主要种类。在这个领域，他们是Walleye Pollock Gadus Chalcogranmus和其他海洋动物的重要猎物。在这项研究中，我们研究了基于在不同频率的体积反向散射强度的歧化中识别KRILL和COPEPODS的可能性。在2012年3月，Funka Bay在Funka Bay和Simrad EK60定量回声发声器中进行了声音调查。在38,120和200kHz收集声学数据。用垂直牵引的环网收集生物样品。为了识别KRILL和COPEPODS，检查了三个频率的体积反向散射强度的歧化。 KRILL和COPEPODS在120和200 kHz的响应中显示出比38 kHz更强。结果表明，对于KRILL，克尔的体积反向散射强度的歧化强度为-1.5至1.3dB。根据频率之间的这些歧义，我们能够识别KRILL和COPEPODS。

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  • 来源
    《日本水産学会誌》 |2016年第4期|共14页
  • 作者

    Kim Eunho; Mukai Tohru; Iida Kohji;

  • 作者单位

    Hokkaido Univ Grad Sch Fisheries Sci Minato Ku Hakodate Hokkaido 0418611 Japan;

    Hokkaido Univ Fac Fisheries Sci Minato Ku Hakodate Hokkaido 0418611 Japan;

    Hokkaido Univ Fac Fisheries Sci Minato Ku Hakodate Hokkaido 0418611 Japan;

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  • 正文语种 jpn
  • 中图分类 水产、渔业;
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