Contrasting physical mechanisms of yellowfin tuna fluctuations between the western and eastern Indian Ocean

作     者：Peng LIAN Le GAO Peng LIAN;Le GAO

作者机构：Key Laboratory of Ocean Observation and Forecasting and Key Laboratory of Ocean Circulation and WavesInstitute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of SciencesBeijing 100049China Laboratory for Ocean Dynamics and ClimateLaoshan LaboratoryQingdao 266061China 

出 版 物：《Journal of Oceanology and Limnology》 (海洋湖沼学报（英文）)

年 卷 期：2024年第42卷第3期

页      面：960-971页

核心收录：

学科分类：07[理学] 0713[理学-生态学] 

基　　金：Supported by the National Natural Science Foundation of China(Nos.42090044,42376175,U2006211) the Marine S&T Fund of Laoshan Laboratory(Qingdao)(No.LSKJ202204302) 

主　　题：yellowfin tuna Indian Ocean sea surface temperature(SST) ocean heat content(OHC) mixed layer depth(MLD) hiatus 

摘      要：As an economically critical pelagic migratory species,yellowfin tuna(Thunnus albacores,YFT)is very sensible to physical and environmental conditions,such as sea surface temperature(SST),ocean heat content(OHC),and the mixed layer depth(MLD).We investigated the impact of SST,OHC,and MLD on fluctuations of YFT catch in the western/eastern Indian Ocean using the long time series of 63-year environmental and YFT *** found that the impact of SST on YFT was heavily overestimated in the past,and MLD plays a more critical role in the YFT catch *** the MLD deepens(34.8 m),SST was more influential in predicting the catches of YFT than OHC in the western Indian Ocean,and OHC was more critical to YFT than SST in the eastern Indian ***,when the MLD shallows(34.8 m),MLD was more vital to predict the catch per unit effort(CPUE)of YFT than SST/OHC in the *** 2000,there was an asynchronous pattern of YFT CPUE induced by higher frequency variations and ocean hiatus of SST/OHC signals in the western and eastern Indian Oceans *** impact of the subsurface hiatus may induce the decrease of YFT in the eastern Indian *** above findings clarified a non-stationary relationship between the environmental factors and catches of YFT and provided new insights into variations in YFT abundance.