Japanese eel Anguilla japonica do not assimilate nutrition during the oceanic spawning migration: Evidence from stable isotope analysis

Seinen Chow, Hiroaki Kurogi, Satoshi Katayama, Daisuke Ambe, Makoto Okazaki, Tomowo Watanabe, Tadafumi Ichikawa, Masashi Kodama, Jun Aoyama, Akira Shinoda, Shun Watanabe, Katsumi Tsukamoto, Sachie Miyazaki, Shingo Kimura, Yoshiaki Yamada, Kazuharu Nomura, Hideki Tanaka, Yukinori Kazeto, Kazuhiro Hata, Takeshi HandaAtsushi Tawa, Noritaka Mochioka

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

During 2008 and 2009, a total of 12 adult Japanese eels Anguilla japonica were captured in the southern part of the West Mariana Ridge, the presumed spawning area. We compared the stable carbon and nitrogen isotope ratios (δ13C and δ15N) between the 'Mariana silvers' (terminal phase) and those of yellow and silver eels caught in rivers, lakes and coastal areas of Japan (initial phase). Profiles of stable isotope signatures between the initial and terminal phases were similar; both characteristically had a wide range for δ13C (-24.9 to -12.0% and -20.5 to -11.3% for the initial and terminal phases, respectively) and δ15N (6.5 to 18.4% and 9.0 to 18.1, respectively). Mesopelagic fishes, including several other anguillid species caught near the West Mariana Ridge, characteristically had a very narrow range of δ13C (-16.9 to -15.3%) and a wide but lower range of δ15N (5.3 to 11.1%) than the Japanese eels. The very similar profiles in stable isotopic signatures between the initial and terminal phase eels, distinct from those of Mariana mesopelagic fishes, indicate that Japanese eels do not assimilate nutrition from the marine environment during long (ca. 6 mo) spawning migration and retain the initial isotopic values of where they ceased feeding.

Original languageEnglish
Pages (from-to)233-238
Number of pages6
JournalMarine Ecology Progress Series
Volume402
DOIs
Publication statusPublished - Mar 8 2010

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Ecology

Fingerprint Dive into the research topics of 'Japanese eel Anguilla japonica do not assimilate nutrition during the oceanic spawning migration: Evidence from stable isotope analysis'. Together they form a unique fingerprint.

  • Cite this

    Chow, S., Kurogi, H., Katayama, S., Ambe, D., Okazaki, M., Watanabe, T., Ichikawa, T., Kodama, M., Aoyama, J., Shinoda, A., Watanabe, S., Tsukamoto, K., Miyazaki, S., Kimura, S., Yamada, Y., Nomura, K., Tanaka, H., Kazeto, Y., Hata, K., ... Mochioka, N. (2010). Japanese eel Anguilla japonica do not assimilate nutrition during the oceanic spawning migration: Evidence from stable isotope analysis. Marine Ecology Progress Series, 402, 233-238. https://doi.org/10.3354/meps08448