[AOS26-P05] Migration history of sardine reconstructed from carbon-14 as a tracer
Keywords:Radiocarbon, Isotopic Analysis, Marine Ecology, Sardine
We applied this concept using improved radiocarbon techniques using Single Stage Accelerator Mass Spectrometry installed at the Atmosphere and Ocean Research Institute, University of Tokyo (Yokoyama et al., 2016 PNAS). Groups of sardine captured off Japan were used and clearly identified two different types namely the one that was born in Kuroshio region from winter to spring and traveled to the north where Oyashio water is dominant, whereas the other group remained entire time before captured by fisherman. This is the first time to distinguish individual life history of sardine in quantitative manner and shows strong promise of radiocarbon based ecological studies of fish migration.