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首页> 外文期刊>Estuarine Coastal and Shelf Science >Fishery biomass trends of exploited fish populations in marine ecoregions, climatic zones and ocean basins
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Fishery biomass trends of exploited fish populations in marine ecoregions, climatic zones and ocean basins

机译：海洋生态学，气候区和海洋盆地的渔业生物质趋势

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This contribution presents time series of the 'fishery biomass' of fish populations, defined as the weight (whole-body, wet weight) of the in-water part of a fishable population, i.e., that part of a population (also called 'stock') that is exposed to fishing gears. Detailed data of this type are only available for a limited number of species that are targets of the fisheries in the waters of economically developed regions, such as Europe, the USA, Canada or Australia. However, similar fishery biomass assessments are generally lacking for developing countries, even for many of their most heavily fished species. Here, an estimation of the long-term fishery biomass trends of 1320 fish and invertebrate populations for 483 species exploited by fisheries in the 232 coastal Marine Ecoregions (MEs) around the world was undertaken. Fishery biomass trends were derived using the Bayesian CMSY stock assessment method applied to the global fisheries catch database for 1950-2014 as reconstructed by the Sea Around Us for every maritime fishing country in the world. Overall, the results suggest a consistent decline in the fishery biomass of exploited populations, in virtually all climatic zones and ocean basins in the world. The only zone with currently higher fishery biomass than in 1950 is the northern Pacific polar-boreal zone, likely due to environmental changes that occurred in the region positively affecting fish populations, combined with prudent management of the fisheries. For populations in MEs that are known to have highly questionable catch statistics, the results suggested smaller declines in fishery biomass than likely occurred in reality, implying that these results do not exaggerate declining trends in fishery biomass. This study used informative Bayesian priors to improve the trend analyses in areas where systematic stock assessments were conducted. The use of these independent assessments reduced the uncertainty associated with the findings of this study.
机译：这种贡献呈现了鱼群的“渔业生物量”的时间序列，定义为水中群体的水中部分的重量（全身，湿重），即人口的那部分（也称为“库存'）暴露在渔具上。这种类型的详细数据仅适用于有限数量的物种，这些物种是经济发达地区的水域中的渔业的目标，例如欧洲，美国，加拿大或澳大利亚。然而，即使对于许多最严重的物种而言，也缺乏类似的渔业生物量评估。在这里，在世界各地的232个沿海海洋生态（MES）中渔业利用的483种物种的长期渔业生物量趋势估计了1320条鱼类和无脊椎动物的趋势。渔业生物量趋势是使用贝叶斯CMSY股票评估方法来源于1950 - 2014年全球渔业捕获数据库的渔业股票评估方法，这是世界各地的海域周围的海上重建。总体而言，结果表明，在世界上几乎所有气候区域和海洋盆地都有漏斗生物量的一贯下降。目前渔业生物质唯一比1950年的唯一区是北太平洋北方地区，可能由于该地区发生的环境变化，积极影响鱼群，与渔业的谨慎管理相结合。对于已知具有高度可疑的捕获统计数据的MES中的人口，结果表明渔业生物质的下降比现实中可能发生较小，这意味着这些结果不会夸大渔业生物量下降趋势。本研究使用了信息贝叶斯女前沿，以改善进行系统股票评估的地区的趋势分析。这些独立评估的使用减少了与本研究结果相关的不确定性。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2020年第30期|106896.1-106896.10|共10页
  • 作者

    Palomares M. L. D.; Froese R.; Derrick B.; Meeuwig J. J.; Noel S-L; Tsui G.; Woroniak J.; Zeller D.; Pauly D.;

  • 作者单位

    Univ British Columbia Sea Around Us Vancouver BC V6T 1Z4 Canada;

    GEOMAR Helmholtz Ctr Ocean Res Dustembrooker Weg 20 D-24105 Kiel Germany;

    Univ British Columbia Sea Around Us Vancouver BC V6T 1Z4 Canada;

    Univ Western Australia Marine Futures Lab Crawley 6009 Australia;

    Univ British Columbia Sea Around Us Vancouver BC V6T 1Z4 Canada;

    Univ British Columbia Sea Around Us Vancouver BC V6T 1Z4 Canada;

    Univ British Columbia Sea Around Us Vancouver BC V6T 1Z4 Canada;

    Univ Western Australia Sea Around Us Indian Ocean Crawley 6009 Australia;

    Univ British Columbia Sea Around Us Vancouver BC V6T 1Z4 Canada;

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