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Masking and unmasking fishing down effects: The Bohai Sea (China) as a case study

机译：掩盖和揭露垂钓效果：以渤海（中国）为例

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摘要

The Bohai Sea, in Northeastern China, which has been severely overexploited since the 1950s, is not only an exemplary case of the 'fishing down' phenomenon (where large, high-trophic level fish are replaced by smaller fish and invertebrates as the overall biomass is reduced), but also can be used to illustrate one of the masking effects for fishing down. Thus, the decadal decline in the mean trophic level of the biomass in the Bohai Sea is more pronounced than the decline of the mean trophic level of the catch extracted from that sea. This effect is similar to what occurred in the Celtic Sea, where previous authors called this difference 'skipper effect' (because skippers try to maintain catches of larger fish), and in the Gulf of Thailand. The skipper effect appears to be a powerful masking factor for the fishing down phenomenon, i.e., biomass tend to be more affected than suggested by time series of the mean trophic of catches.
机译：自1950年代以来就已经严重过度开发的中国东北渤海，不仅是“垂钓”现象的典范（大而富营养化的鱼类被较小的鱼类和无脊椎动物作为全部生物量所代替减少），但也可以用来说明垂钓的掩蔽效果之一。因此，与从该海中提取的渔获物的平均营养级下降相比，渤海生物质平均营养级下降了十年。这种影响类似于在凯尔特海（以前的作者称这种差异为“船长效应”（因为船长试图保持较大鱼类的捕获量））和泰国湾的情况。船长效应似乎是捕捞现象的有力掩盖因素，即，生物量往往比渔获物平均营养级的时间序列所暗示的受影响更大。

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  • 来源
    《Ocean & coastal management》 |2020年第2期|105033.1-105033.5|共5页
  • 作者

  • 作者单位

    Chinese Acad Sci Inst Oceanol CAS Key Lab Marine Ecol & Environm Sci Qingdao 266071 Peoples R China|Qingdao Natl Lab Marine Sci & Technol Lab Marine Ecol & Environm Sci Qingdao 266237 Peoples R China;

    Univ British Columbia Inst Oceans & Fisheries Sea Around Us Vancouver BC Canada;

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  • 正文语种 eng
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  • 关键词

    Bohai sea; Trophic level; Fishing down effect; Skipper effect;

    机译：渤海营养级垂钓效果;船长效应;

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