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

ABSTRACT: Massive populations of sardines inhabit both the western and eastern boundaries of the world's subtropical ocean basins, supporting both commercial fisheries and populations of marine predators. Sardine populations in western and eastern boundary current systems have responded oppositely to decadal scale anomalies in ocean temperature, but the mechanism for differing variability has remained unclear. Here, based on otolith microstructure and high-resolution stable isotope analyses, we show that habitat temperature, early life growth rates, energy expenditure, metabolically optimal temperature, and, most importantly, the relationship between growth rate and temperature are remarkably different between the two subpopulations in the western and eastern North Pacific. Varying metabolic respons

SUBMITTER: Sakamoto T 

PROVIDER: S-EPMC9573866 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature