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  1. Article

    Open Access

    Anguillid eels as a surrogate species for conservation of freshwater biodiversity in Japan

    To monitor and manage biodiversity, surrogate species (i.e., indicator, umbrella and flagship species) have been proposed where conservation resources are focused on a limited number of focal organisms. Using ...

    Hikaru Itakura, Ryoshiro Wakiya, Matthew Gollock, Kenzo Kaifu in Scientific Reports (2020)

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  2. No Access

    Article

    Anthropogenic impacts on the distribution of wild and cultured Japanese eels in the Tone River watershed, Japan, from otolith oxygen and carbon stable isotopic composition

    Effective management decisions are vital for the declining Japanese eel Anguilla japonica. Elucidating the distribution range of wild eels (i.e., naturally recruited individuals) represents the first step in reso...

    Kohma Arai, Hikaru Itakura, Akihito Yoneta, Kenzo Kaifu… in Environmental Biology of Fishes (2019)

  3. No Access

    Article

    Depletion of naturally recruited wild Japanese eels in Okayama, Japan, revealed by otolith stable isotope ratios and abundance indices

    To investigate the population dynamics of naturally recruited wild Japanese eels, fisheries data of wild individuals in Okayama Prefecture were investigated as a case study. Wild and stocked eels were discrimi...

    Kenzo Kaifu, Kazuki Yokouchi, Tomihiko Higuchi, Hikaru Itakura… in Fisheries Science (2018)

  4. No Access

    Article

    Discovering the dominance of the non-native European eel in the upper reaches of the Tone River system, Japan

    To investigate the presence of non-native anguillid eels in Japanese waters, 141 eels were collected from seven sampling sites throughout the Tone River system. Genetic species identification showed an extraor...

    Kohma Arai, Hikaru Itakura, Akihito Yoneta, Tatsuki Yoshinaga… in Fisheries Science (2017)

  5. No Access

    Article

    Growth conditions after recruitment determine residence-emigration tactics of female Japanese eels Anguilla japonica

    Back-calculated annual growth of 156 yellow-phase female Japanese eels Anguilla japonica sampled from freshwater sites in the Tsuchikawa River, Kagoshima, Japan, were compared among eels from the upper reaches (“...

    Ryoshiro Wakiya, Kenzo Kaifu, Noritaka Mochioka in Fisheries Science (2016)

  6. No Access

    Chapter and Conference Paper

    Contribution to the Understanding of Particle Motion Perception in Marine Invertebrates

    Marine invertebrates potentially represent a group of species whose ecology may be influenced by artificial noise. Exposure to anthropogenic sound sources could have a direct consequence on the functionality a...

    Michel André, Kenzo Kaifu, Marta Solé… in The Effects of Noise on Aquatic Life II (2016)

  7. No Access

    Article

    Do Japanese eels recruit into the Japan Sea coast?: A case study in the Hayase River system, Fukui Japan

    The Japanese coastlines along the Sea of Japan (Japan Sea) have been thought to be one of the margins of the distribution range of the Japanese eel Anguilla japonica, and there is evidence that eels had naturally...

    Kenzo Kaifu, Hideaki Maeda, Kazuki Yokouchi… in Environmental Biology of Fishes (2014)

  8. No Access

    Article

    Demographic survey of the yellow-phase Japanese eel Anguilla japonica in Japan

    Catch statistics and biological data of the Japanese eel Anguilla japonica from 12 river systems in nine prefectures of Japan (36°N, 140°E–31°N, 130°E) during 1999–2004 were analyzed in order to evaluate the demo...

    Kazuki Yokouchi, Yasuyuki Kaneko, Kenzo Kaifu, Jun Aoyama… in Fisheries Science (2014)

  9. No Access

    Article

    Evidence of niche segregation between freshwater eels and conger eels in Kojima Bay, Japan

    The aim of this study was to examine the possible interspecific interactions between the freshwater eel Anguilla japonica and the marine conger eel Conger myriaster. Spatial distribution, foraging time, and diet ...

    Kenzo Kaifu, Michael J. Miller, Jun Aoyama, Izumi Washitani… in Fisheries Science (2013)

  10. No Access

    Article

    Diet of Japanese eels Anguilla japonica in the Kojima Bay-Asahi River system, Japan

    The diet of Japanese eels, Anguilla japonica, was investigated using stomach content and stable isotope analyses. Stable isotope enrichment of carbon and nitrogen (Δδ13C and Δδ15N) was first estimated for A. japo...

    Kenzo Kaifu, Sachie Miyazaki, Jun Aoyama, Shingo Kimura… in Environmental Biology of Fishes (2013)

  11. No Access

    Article

    Dispersal of yellow phase Japanese eels Anguilla japonica after recruitment in the Kojima Bay-Asahi River system, Japan

    The density, size and age distribution were investigated for 233 eels, Anguilla japonica, sampled in fresh and brackish water areas of the Kojima Bay-Asahi River system, Okayama, Japan, to evaluate the possible p...

    Kenzo Kaifu, Monami Tamura, Jun Aoyama… in Environmental Biology of Fishes (2010)

  12. No Access

    Article

    Underwater sound detection by cephalopod statocyst

    The cephalopod receptor of particle motion was identified. In a previous study, it was suggested that statocysts served this function, but there was no direct supporting evidence, and epidermal hair cells had ...

    Kenzo Kaifu, Tomonari Akamatsu, Susumu Segawa in Fisheries Science (2008)