Biology

Contrasting life-history responses to climate variability in eastern and western North Pacific sardine populations

T. Sakamoto, M. Takahashi, et al.

Discover how sardine populations in the North Pacific are responding in unexpected ways to climate change. This groundbreaking research by Tatsuya Sakamoto and his team uncovers significant differences in life-history traits between Japanese and Californian sardine subpopulations, shedding light on their contrasting responses to ocean temperature anomalies.

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Abstract

Sardine populations in western and eastern boundary current systems respond oppositely to decadal-scale ocean temperature anomalies. Using otolith microstructure and stable isotope analyses, this study reveals that habitat temperature, early life growth rates, energy expenditure, metabolically optimal temperature, and the growth-temperature relationship differ significantly between western (Japan) and eastern (California) North Pacific sardine subpopulations. These differences in life-history traits, also observed in South African sardine subpopulations, contribute to their contrasting responses to climate change.

Publisher

Nature Communications

Published On

Oct 16, 2022

Authors

Tatsuya Sakamoto, Motomitsu Takahashi, Ming-Tsung Chung, Ryan R. Rykaczewski, Kosei Komatsu, Kotaro Shirai, Toyoho Ishimura, Tomihiko Higuchi

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