Spatial and temporal distribution of jumbo flying squid Dosidicus gigas off Chile and the impact of sea surface temperature
ZHOU Minhua
YU Wei
LIU Bilin
Abstract：Dosidicus gigas widely distributes in the equatorial,Peruvian and Chilean waters of the east-ern Pacific Ocean,which is a key species in marine ecosystems and an important economic fishing target for Chinese squid-jigging fisheries.Based on the sea surface temperature(SST)and catch data in the range from 20° to 34.5°S and from 88.5° to 71.5°W off Chile from 2011 to 2017 in summer(December-February)and autumn(March-May),we analyzed the temporal and spatial change in the center of gravity of the squid fishery off the coast of Chile each year,and explored the relationship between the change of the gravity center of the squid fishery and the SST in the fishery and its response to abnormal climate events.We found that there are significant seasonal and interannual changes in the center of gravity of squid fishery off the coast of Chile,three clusters in the center of gravity of the fishery in dif-ferent years,and significant seasonal differences in the frequency distribution of fishing effort in sum-mer and autumn in terms of longitude,latitude and SST.Compared to the El Niño year,2015,the SST off Chile was low in 2014.The most suitable temperature of D.gigas shifted southeastward,cor-respondingly,the gravity center of fishing ground of D.gigas moved in southeast direction with a lar-ger suitable habitats.Our findings showed that there are significant seasonal and interannual changes in the spatial and terrestrial distribution of D.gigas fisheries off Chile,which is significantly affected by climate variability.
Keywords：Dosidicus gigasspatio-temporal distributionoffshore Chilesea surface temperatureEl Niño event
Publication Date：2025-08-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 193-201 )