Effects of spatial-temporal and environmental factors on the abundance and distribution of Scomber japonicus under lighting purse seine capturing in summer and autumn
XU Guoqiang
XU Kaida
ZHU Wenbin
ZHOU Yongdong
Abstract：In this study,the effects of spatial-temporal and environmental factors on the abundance and distribution of Scomber japonicus were analyzed using a generalized additive model based on the pro-duction data of lighting purse seine capturing in summer and autumn from 2009 to 2018 in combination with the marine environmental data obtained by remote sensing.Catch Per Unit Effort(CPUE)of S.japonicus showed a significant difference from 2009 to 2018.From July to October,the center of gravi-ty of S.japonicus moved northeast,and tended to move to the outer sea.The GAM analysis showed that four factors including year,longitude,latitude and sea surface temperature had significant effects on the CPUE of S.japonicus,and the significance can be ordered by year,sea surface temperature,longitude and latitude.The synoptic analysis showed that the high CPUE of S.japonicus was distribu-ted on both sides of the diagonal line with low longitude,low latitude and high longitude,high lati-tude,and the temperature ranged mostly from 27.2 to 29.7 ℃,which was the central fishing ground for S.japonicus.Our findings provided a reference for finding the central fishing ground and the man-agement of lighting purse seine fisheries.
Keywords：lighting purse seineScomber japonicusgravity centerimpact factorgeneralized additive model
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( 138-146 )