plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111elSSN : 2287-8815
Climate Variability Impact on Major Fishery Species Community Compositionin the Waters of Jeju Island, Republic of Korea (1970-2023)
옹기호·고성길1·박선규·정석근*
제주대학교 해양생명과학과, 1한국해양과학기술원 열대·아열대연구센터
This study investigated the North Pacific climate variability impacts on fishery species composition in Jeju Island waters between 1970 and 2023. Annual catch data were standardized as catch per unit effort (CPUE) using fishing vessel gross tonnage. Ten major fishery species were analyzed with the Pacific Decadal Oscillation (PDO), North Pacific Gyre Oscillation (NPGO), and Arctic Oscillation (AO) indices. Three distinct periods were identified based on species composition similarities: 1970-1981, 1982-1993, and 1999-2023. Seven species correlated with the climate variability indices. The largehead hairtail Trichiurus lepturus and small yellow croaker Larimichthys polyactis were negatively correlated with PDO, whereas the tiger puffer Takifugu rubripes, Pacific flying squid Todarodes pacificus, and silver croaker Pennahia argentata were positively correlated. Chub mackerel Scomber japonicus and Japanese Spanish mackerel Scomberomorus niphonius were positively correlated with NPGO. Compositional shifts corresponded to PDO phase changes: T. pacificus dominated during the positive phase (1977-1997), whereas T. lepturus and L. polyactis increased during the negative phase (1999-2023). North Pacific climate variability likely affects Jeju Island fisheries, underscoring the need for climate-resilient strategies.
Climate variability, Pacific Decadal Oscillation, Fishery species composition, Jeju Island