Otolith biogeochemistry reveals possible impacts of extreme climate events on population connectivity of a highly migratory fish,Japanese Spanish mackerel Scomberomorus niphonius

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外文摘要：Climate change,particularly extreme climate events,is likely to alter the population connectivity in diverse taxa.While the population connectivity for highly migratory species is expected to be vulnerable to climate change,the complex migration patterns has made the measurement difficult and studies rare.However,otolith biogeochemistry provides the possibility to evaluate these climate-induced impacts.Japanese Spanish mackerel Scomberomorus niphonius is a highly migratory fish that is widely distributed in the northwest Pacific.Otoliths biogeochemistry of age-1 spawning or spent individuals from three consecutive years(2016-2018),during which a very strong El Nino was experienced(2015-2016),were analyzed to evaluate the temporal variation of connectivity for S.niphonius population along the coast of China.The elemental con-centrations of the whole otolith showed that Ba:Ca and Mg:Ca values were found to significantly increase in the El Nino year.The random forest classification and clustering analysis indicated a large-scale connectivity between East China Sea and the Yellow Sea in the El Nino year whereas the local S.niphonius assemblages in different spawning areas were more self-sustaining after the El Nino year.These findings lead to the hypothesis that environmental conditions associated with the El Nino Southern Oscillation(ENSO)events in the Northern Pacific Ocean would likely influence the population con-nectivity of S.niphonius.If so,extreme climate events can result in profound changes in the extent,pattern and connectivity of migratory fish populations.Our study demonstrates that otolith biogeochemistry could provide insight towards revealing how fish population response to extreme climate events.

外文关键词：

Population connectivityENSOOtolith biogeochemistryMigrationScomberomorus niphonius

作者：

Xindong Pan、Yong Chen、Tao Jiang、Jian Yang、Yongjun Tian

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作者单位：

Deep Sea and Polar Fisheries Research Center and Key Laboratory of Mariculture,Ministry of Education,Ocean University of China,Qingdao 266003,China

Frontiers Science Center for Deep Ocean Multispheres and Earth System,Ocean University of China,Qingdao 266003,China

School of Marine and Atmospheric Sciences,State University of New York at Stony Brook,Stony Brook,NY 11794,USA

Key Laboratory of Ecological Environment and Resources of Inland Fisheries,Freshwater Fisheries Research Center,Chinese Academy of Fishery Sciences,Wuxi 214081,China

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出版年：

2024

DOI：

10.1007/s42995-024-00229-x

海洋生命科学与技术(英文)

ISSN：

年,卷(期)：2024.6(4)