Impacts of interannual ocean circulation variability on Japanese eel larval migration in the western north pacific ocean

Yu Lin Chang, Jinyu Sheng, Kyoko Ohashi, Mélanie Béguer-Pon, Yasumasa Miyazawa

研究成果: 雜誌貢獻期刊論文同行評審

30 引文 斯高帕斯(Scopus)


The Japanese eel larvae hatch near the West Mariana Ridge seamount chain and travel through the North Equatorial Current (NEC), the Kuroshio, and the Subtropical Countercurrent (STCC) region during their shoreward migration toward East Asia. The interannual variability of circulation over the subtropical and tropical regions of the western North Pacific Ocean is affected by the Philippines-Taiwan Oscillation (PTO). This study examines the effect of the PTO on the Japanese eel larval migration routes using a three-dimensional (3D) particle tracking method, including vertical and horizontal swimming behavior. The 3D circulation and hydrography used for particle tracking are from the ocean circulation reanalysis produced by the Japan Coastal Ocean Predictability Experiment 2 (JCOPE2). Our results demonstrate that bifurcation of the NEC and the strength and spatial variation of the Kuroshio affect the distribution and migration of eel larvae. During the positive phase of PTO, more virtual eels ("v-eels") can enter the Kuroshio to reach the south coast of Japan and more v-eels reach the South China Sea through the Luzon Strait; the stronger and more offshore swing of the Kuroshio in the East China Sea leads to fewer eels entering the East China Sea and the onshore movement of the Kuroshio to the south of Japan brings the eels closer to the Japanese coast. Significant differences in eel migration routes and distributions regulated by ocean circulation in different PTO phases can also affect the otolith increment. The estimated otolith increment suggests that eel age tends to be underestimated after six months of simulation due to the cooler lower layer temperature. Underestimation is more significant in the positive PTO years due to the wide distribution in higher latitudes than in the negative PTO years.

期刊PloS one
出版狀態已發佈 - 2015 12月 1

ASJC Scopus subject areas

  • 一般生物化學,遺傳學和分子生物學
  • 一般農業與生物科學
  • 多學科


深入研究「Impacts of interannual ocean circulation variability on Japanese eel larval migration in the western north pacific ocean」主題。共同形成了獨特的指紋。