基于空间自相关模型的南极半岛北部水域南极磷虾渔场时空演变特征
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S 931

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国家重点研发计划(2018YFC1406802)


Spatio-temporal evolution characteristics of Antarctic krill (Euphausia superba) fishing ground in the northern waters of Antarctic Peninsula based on spatial autocorrelation model
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    摘要:

    南极磷虾是南极海域生态系统的关键物种,是南极渔业的主要捕捞对象,其渔场具有显著的时空分布特征。为明晰南极半岛北部水域磷虾渔场的变动情况,本研究根据中国2010—2020年南极磷虾渔业统计资料,运用全局Moran’s I 指数和热点分析对该水域磷虾渔场的时空分布特征进行了分析。结果显示,南极半岛北部水域磷虾渔获量在空间分布上由分散演变为集中,由南设得兰群岛(South Shetland Islands,SSI)北侧逐渐过渡到布兰斯菲尔德海峡(Bransfield Strait,BS),高值均沿陆地分布。单位捕捞努力量渔获量(catch per unit effort,CPUE)高值主要发生在SSI北侧和BS内靠近南极半岛一侧,沿陆地分布。2010—2020年南极半岛北部水域磷虾渔场呈显著空间聚集性,2014、2015、2016、2018和2020年的空间自相关性相对较弱。磷虾渔场分布的热点区和冷点区时空演变特征明显,热点区由SSI北部逐渐向BS内迁移,SSI北部逐渐由热点区变为冷点区,而BS内逐渐由冷点区转变为热点区。

    Abstract:

    Antarctic krill (Euphausia superba) is a key species of Antarctic marine ecosystem and the main fishing object of Antarctic fishery, whose fishing ground has significant temporal and spatial distribution characteristics. In order to clarify the changes of krill fisheries in the northern waters of the Antarctic Peninsula, based on the statistical data of E. superba fisheries in China from 2010 to 2020, this study analyzed the temporal and spatial distribution characteristics of krill fisheries in this water area by using the global Moran's I index and hot spot analysis. The results showed that the spatial distribution of krill catches in the northern waters of the Antarctic Peninsula evolved from dispersion to concentration, and with gradual transition from the north of the South Shetland Islands (SSI) to the Bransfield Strait (BS), with high values distributed along the land. The high value of catch per unit effort (CPUE) mainly occurred in the north of SSI and the side near the Antarctic Peninsula in BS, which was distributed along the land. The krill fisheries in the northern waters of the Antarctic Peninsula showed significant spatial aggregation from 2010 to 2020, and the spatial autocorrelation in 2014, 2015, 2016, 2018 and 2020 was relatively weak. The temporal and spatial evolution characteristics of hot spots and cold spots in the distribution of krill fishing grounds were obvious. The hot spots gradually migrated from the north of SSI to BS, the north of SSI gradually changed from hot spots to cold spots, and the BS gradually changed from cold spots to hot spots. This study discussed the temporal and spatial distribution characteristics of krill fishery, which could not only provide a scientific basis for further research on krill population distribution and fishery formation mechanism, but also provided basic data for improving the production efficiency of krill fishery.

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赵国庆,宋学锋,徐博,杨嘉樑,李帅,饶欣,黄洪亮,张衡.基于空间自相关模型的南极半岛北部水域南极磷虾渔场时空演变特征[J].水产学报,2022,46(3):368~378

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  • 收稿日期:2021-08-31
  • 最后修改日期:2022-02-18
  • 录用日期:2022-02-23
  • 在线发布日期: 2022-03-21
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