Spatial-temporal distribution of fishing ground of Antarctic krill fishery and its correlation with environmental variables in Bransfield Strait in 2021
CHEN Zhuang
LIU Hui
ZHU Guoping
Abstract：In recent years,Antarctic krill(Euphausia superba)fisheries has been concentrated signifi-cantly in the Antarctic Peninsula,especially Bransfield Strait,where inter-annual variability in fishing ground is significant and unpredictable.Therefore,the relationship between the spatial-temporal distri-bution of fishing ground and the environmental variables was examined using the generalized additive model(GAM)and gravity center analysis of fishing ground.The results showed that the distribution of krill fishery from March to June,2021,was mainly distributed within the area of 63°～63°50′ S,58°～60°W.The center of gravity of catch generally shifted to the northeast,and the range of variation in the center of gravity of krill fishery was small.The GAM explained 46.3％of the total deviation of CPUE,with the largest contribution coming from the month,which accounted for 83.6％of the total deviation explained.The model results showed that the CPUE of krill fishery was related to month and chloro-phyll a concentration.In this study,we explored the spatial and temporal distribution of krill in Brans-field Strait,and our findings provided scientific data for the rational development and utilization of krill resource in the key fishing ground.
Keywords：Euphausia superbacatch per unit effortgravity center of fishing groundAntarctic Pen-insula
Publication Date：2025-10-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 120-128 )