Effects of decadal climate variability on spatiotemporal distribution of Indo-Pacific yellowfin tuna population.

ABSTRACT: Spatial variations in tuna population and abundance are strongly linked to large-scale climate fluctuations, such as the Pacific decadal oscillation (PDO) and Atlantic multidecadal oscillation (AMO). However, the mechanisms underlying the association of climate indices with yellowfin tuna (YFT) abundance and habitat preference remain unclear. We analysed long-term longline fishery data for YFT and oceanic climate variability index data for 1971-2018. The standardized catch per unit effort (CPUE) of Indo-Pacific Ocean YFT was higher during negative AMO and positive PDO phases. In tropical Pacific Ocean, the trend of YFT habitat preference exhibited seesaw patterns because of the distinct environmental factors influenced by the PDO phase. The PDO changed the environmental parameters througho

SUBMITTER: Wu YL 

PROVIDER: S-EPMC9374684 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature