Updated on 2024/02/18

写真a

 
KAIFU Kenzo
 
Organization
Faculty of Law Professor
Other responsible organization
Graduate School of Science and Engineering(General Subjects)
Contact information
The inquiry by e-mail is 《here
Profile
The aim of our lab is to conserve and improve aquatic ecosystem services. Anguillid eel species, especially Japanese eel, Anguilla japonica, are the most relevant target species in this lab. To contribute conservation and sustainable use of Anguillid eels, we are working on the following subjects, using multidisciplinary approaches. - Ecology of Anguillid eels in continental waters - Effectiveness and appropriateness of eel stocking - Glass eel IUU - Distribution, ecology and use of Anguillid eels before anthropocene - International framework for Anguillid eel management - Sustainable use of eels in Indonesia
External link

Degree

  • 農学博士 ( 東京大学 )

  • 海洋科学修士 ( 東京海洋大学海洋科学技術研究科 )

Education

  • 2011.3
     

    The University of Tokyo   Graduate School of Agricultural and Life Sciences   doctor course   completed

  • 2005.9
     

    Tokyo University of Marine Science and Technology   master course   completed

  • 1998.3
     

    Hitotsubashi University   Faculty of Sociology   graduated

  • 1992.3
     

    東京都立八王子東高校   graduated

Research History

  • 2021.4 -  

    Chuo University   法学部   教授

  • 2016.4 - 2021.3

    Chuo University   法学部   准教授

  • 2019.6 -  

    Zoological Society of London   Honorary Conservation Fellow

  • 2016 - 2019

    Okayama University   理学部   非常勤講師

  • 2014.4 - 2016.3

    Chuo University   法学部   助教

  • 2011.4 - 2014.3

    The University of Tokyo   農学生命科学研究科   特任助教

  • 2010.4 - 2014.3

    Meisei University   情報学部   非常勤講師

▼display all

Professional Memberships

  • 日本水産学会

  • 日本生態学会

Research Interests

  • Conservation Ecology

Research Areas

  • Life Science / Ecology and environment  / 生態・環境

Papers

  • Future tasks for the conservation and sustainable use of Japanese eel: A review of the stocking/restocking of Anguillid eel species Reviewed

    HIROMI SHIRAISHI, KENZO KAIFU

    NIPPON SUISAN GAKKAISHI   90 ( 1 )   2 - 18   2024.1

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    Authorship:Last author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japanese Society of Fisheries Science  

    DOI: 10.2331/suisan.23-00032

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  • Early warning of an upsurge in international trade in the American Eel Reviewed

    Hiromi Shiraishi, Kenzo Kaifu

    Marine Policy   159   105938 - 105938   2024.1

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    Authorship:Last author   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.marpol.2023.105938

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  • Marine invertebrates and noise Reviewed

    Marta Solé, Kenzo Kaifu, T. Aran Mooney, Sophie L. Nedelec, Frédéric Olivier, Andrew N. Radford, Mirella Vazzana, Matthew A. Wale, Jayson M. Semmens, Stephen D. Simpson, Giuseppa Buscaino, Anthony Hawkins, Natacha Aguilar de Soto, Tomoari Akamatsu, Laurent Chauvaud, Ryan D. Day, Quinn Fitzgibbon, Robert D. McCauley, Michel André

    Frontiers in Marine Science   10   2023.3

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    Within the set of risk factors that compromise the conservation of marine biodiversity, one of the least understood concerns is the noise produced by human operations at sea and from land. Many aspects of how noise and other forms of energy may impact the natural balance of the oceans are still unstudied. Substantial attention has been devoted in the last decades to determine the sensitivity to noise of marine mammals—especially cetaceans and pinnipeds—and fish because they are known to possess hearing organs. Recent studies have revealed that a wide diversity of invertebrates are also sensitive to sounds, especially via sensory organs whose original function is to allow maintaining equilibrium in the water column and to sense gravity. Marine invertebrates not only represent the largest proportion of marine biomass and are indicators of ocean health but many species also have important socio-economic values. This review presents the current scientific knowledge on invertebrate bioacoustics (sound production, reception, sensitivity), as well as on how marine invertebrates are affected by anthropogenic noises. It also critically revisits the literature to identify gaps that will frame future research investigating the tolerance to noise of marine ecosystems.

    DOI: 10.3389/fmars.2023.1129057

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  • Slower growth of farmed eels stocked into rivers with higher wild eel density Reviewed

    Ryoshiro Wakiya, Hikaru Itakura, Tatsumu Hirae, Tadamitsu Igari, Miyuki Manabe, Noriaki Matsuya, Katsushi Miyata, Masayuki K. Sakata, Toshifumi Minamoto, Takashi Yada, Kenzo Kaifu

    Journal of Fish Biology   2022.6

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    Authorship:Last author   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1111/jfb.15131

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jfb.15131

  • Agonistic behaviour of wild eels and depressed survival and growth of farmed eels in mixed rearing experiments Reviewed

    Ryoshiro Wakiya, Hikaru Itakura, Yuji Imayoshi, Kenzo Kaifu

    Journal of Fish Biology   100 ( 6 )   1365 - 1374   2022.6

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    Authorship:Last author   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1111/jfb.15047

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jfb.15047

  • Cumulative effects of low‐height barriers on distributions of catadromous Japanese eels in Japan Reviewed

    K. Yokouchi, H. Itakura, R. Wakiya, T. Yoshinaga, N. Mochioka, S. Kimura, K. Kaifu

    Animal Conservation   2021.7

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    Authorship:Last author   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1111/acv.12725

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/acv.12725

  • Management of glass eel fisheries is not a sufficient measure to recover a local Japanese eel population. Reviewed

    Kaifu K, Yokouchi K, Miller MJ, Washitani I

    Marine Policy   134   2021

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    We evaluated whether a strict fisheries management measure of closure of fishing for recruiting juveniles (glass eels) could have resulted in the recovery of a local population of Japanese eels, Anguilla japonica, when there was no harmonized management of the other life stages, the relevant ecosystem, or local socioeconomic factors (i.e., Ecosystem-Based Management (EBM) approach not applied). The study was conducted in the Kojima Bay-Asahi River system, Okayama Prefecture, Japan, because this prefecture has not permitted commercial glass eel fisheries since 2003, which provides a unique opportunity to conduct a quasi–experimental evaluation of the effects of a glass eel fisheries moratorium. Longline eel fishery data and fishery-independent sampling data indicate that growth-phase Japanese eel (yellow eel) abundance in this water system has not increased, or maybe even decreased, since commercial glass eel fisheries in this area were closed. Based on the results obtained in this study, we concluded that the closure of glass eel fisheries was not a sufficient countermeasure to recover the Japanese eel population in the study area. To conserve and sustainably use Japanese eels, a series of management measures such as habitat restoration and management of yellow and silver eel fisheries are needed along with the control of glass eel fisheries throughout the species distribution range. The EBM approach might be helpful to progress integrated management at appropriate spatial scales.

    DOI: 10.1016/j.marpol.2021.104806

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  • Important questions to progress science and sustainable management of Anguillid eels. Reviewed

    Righton D, Piper A, Aarestrup K, Amilhat E, Belpaire C, Casselman J, Castonguay M, Diaz E, Doerner H, Faliex B, Feunteun E, Fukuda N, Hanel R, Hanzen C, Jellyman D, Kaifu K, McCarthy K, Miller M, Pratt T, Sasal P, Schabetsberger R, Shiraishi H, Simon G, Sjoberg N, Steele K, Tsukamoto K, Walker A, Westerberg H, Yokouchi K, Gollock M

    Fish and Fisheries   22 ( 4 )   762 - 788   2021

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    Anguillid eels are found globally in fresh, transitional and saline waters and have played an important role in human life for centuries. The population status of several species is now of significant concern. The threats to populations include direct exploitation at different life stages, blockages to migratory routes by dams and other structures, changes in river basin management that impact habitat carrying capacity and suitability, pollution, climate change, diseases and parasites. While much has been done to understand eel biology and ecology, a major challenge is to identify the key research and management questions so that effective and targeted studies can be designed to inform conservation, management and policy. We gathered 30 experts in the field of eel biology and management to review the current state of knowledge for anguillid eel species and to identify the main topics for research. The identified research topics fell into three themes: (a) Lifecycle and Biology; (b) Impacts and (c) Management. Although tropical anguillid eels are by far the least well understood, significant knowledge gaps exist for all species. Considerable progress has been made in the last 20 years, but the status of many species remains of great concern, particularly for northern temperate species. Without improved engagement and coordination at the regional, national and international level, the situation is unlikely to improve. Further, adaptive management mechanisms to respond to developments in science, policy and our knowledge of potential threats are required to ensure the future of these important and enigmatic species.

    DOI: 10.1111/faf.12549

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

    Hikaru Itakura, Ryoshiro Wakiya, Matthew Gollock, Kenzo Kaifu

    Scientific Reports   10 ( 1 )   2020.12

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    DOI: 10.1038/s41598-020-65883-4

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    Other Link: http://www.nature.com/articles/s41598-020-65883-4

  • Evaluation of downward movements of Japanese eel Anguilla japonica inhabiting brackish water areas Reviewed

    Ryoshiro Wakiya, Kenzo Kaifu, Kazuhisa Azechi, Katsumi Tsukamoto, Noritaka Mochioka

    JOURNAL OF FISH BIOLOGY   96 ( 2 )   2020.2

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    This study evaluated the size and age distributions and otolith microchemistry of the Japanese eel Anguilla japonica in freshwater and brackish water areas in the Aki and Tsuchikawa rivers for 1 year, and in brackish water areas in the Asahi River for 3years to understand the movements of Japanese eels between continental habitats of different salinity after recruitment (n = 759). For all three rivers, the total length (L-T) and age distributions were consistent; yellow eels captured in the upper brackish water (Aki River: 353.5 +/- 77.4mm and 3.0 +/- 0.8years; Tsuchikawa River: 287.7 +/- 87.3mm and 3.7 +/- 1.3years; Asahi River: 418.2 +/- 112.1mm and 4.2 +/- 1.7years) were smaller and younger than not only those in the fresh water of the two rivers but also those in the lowest brackish water sampling areas (Aki River: 436.0 +/- 71.6mm and 3.8 +/- 1.1years; Tsuchikawa River: 370.9 +/- 121.7mm and 4.9 +/- 2.3years; Asahi River: 558.5 +/- 85.9mm and 5.7 +/- 1.7years). In the Asahi River, these tendencies were found throughout the 3years. Otolith analysis indicated that the majority of the eels captured in the lowest brackish water areas had moved down from upstream. These results suggest that Japanese eels inhabiting saline water generally move from the upper estuary as they grow. The upper estuary can be an important area for the management of this species because these eels spend their early continental growth life there.

    DOI: 10.1111/jfb.14236

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  • Ghrelin and food acquisition in wild and cultured Japanese eel (Anguilla japonica) Reviewed

    Yada T, Abe M, Kaifu K, Yokouchi K, Fukuda N, Kodama S, Hakoyama H, Ogoshi M, Kaiya H, Sakamoto T, Moriyama S, Tsukamoto K

    Comparative Biochemistry and Physiology Part A   245   2020

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE INC  

    To clarify the relationships between growth, endocrine status and habitat characteristics in Japanese eel (Anguilla japonica), plasma and stomach mRNA levels of ghrelin were examined in wild eels captured in the river and the bay, and in cultured eels during and after experimental fasting. Wild juvenile eels captured in freshwater habitats within the river showed significantly higher plasma and stomach mRNA levels of ghrelin than did fish obtained from brackish-water habitats within the bay. In cultured eels experimentally fasted for 4 weeks, plasma and stomach mRNA levels of ghrelin increased. After refeeding, the both parameters returned to the levels observed in continuously feeding control fish. In pigmented elvers, 2 months of feed restriction resulted in a significant increase in whole-body ghrelin mRNA. It is suggested that interaction between ghrelin and feeding is related to their habitats through differential food acquisition in fresh and brackish water environments.

    DOI: 10.1016/j.cbpa.2020.110700

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  • Age, growth, and sex ratios of the giant mottled eel, Anguilla marmorata, in freshwater habitats near their northern geographic limit: a comparison to tropical regions Reviewed

    Wakiya R, Itakura H, Kaifu K

    Zoological Studies   2019.9

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  • 超音波テレメトリーを用いた、汽水域におけるニホンウナギの生息場利用の把握 Reviewed

    海部健三, 竹野遼馬, 市川光太郎, 三田村啓理, 高木淳一, 脇谷量子郎, 板倉光, 石井潤, 荒井修亮

    応用生態工学   22 ( 1 )   73 - 82   2019.7

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  • Use of rocks as refuges by Japanese eel, Anguilla japonica, in artificial pond, revealed by acoustic telemetry. Reviewed

    海部健三, 竹野遼馬, 竹野遼馬, 高木淳一, 高木淳一, 市川光太郎, 市川光太郎, 脇谷量子郎, 板倉光, 平江多績, 猪狩忠光, 三田村啓理, 三田村啓理, 荒井修亮, 荒井修亮

    応用生態工学   22 ( 2 )   83 - 92   2019.4

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    J-GLOBAL

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  • Environmental DNA analysis reveals the spatial distribution, abundance, and biomass of Japanese eels at the river‐basin scale Reviewed

    Hikaru Itakura, Ryoshiro Wakiya, Satoshi Yamamoto, Kenzo Kaifu, Takuya Sato, Toshifumi Minamoto

    Aquatic Conservation: Marine and Freshwater Ecosystems   29 ( 3 )   361 - 373   2019.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1002/aqc.3058

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/aqc.3058

  • 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 Reviewed

    Kohma Arai, Hikaru Itakura, Akihito Yoneta, Kenzo Kaifu, Kotaro Shirai, Yoichi Miyake, Shingo Kimura

    Environmental Biology of Fishes   2019

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    DOI: 10.1007/s10641-019-00915-1

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  • Challenges in assessments of Japanese eel stock. Reviewed

    Kaifu K

    Marine Policy   102   1 - 4   2019

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  • Increasing or decreasing? - current status of the Japanese eel stock. Reviewed

    Kaifu K, Yokouchi K

    Fisheries Research   220   2019

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    Although Japanese eel, Anguilla japonica, is listed as endangered on the International Union for Conservation of Nature Red List of Threatened Species, a previous stock assessment of the Japanese eel estimated that the age 1+ stock of the species has been recovering since 1990. To help understand the population dynamics of wild Japanese eels, eel fisheries in coastal and estuarine areas in Japan were investigated, because inland fisheries cooperative associations have conducted eel stocking that is presumed to bias the fisheries data in inland waters of Japan. We conducted a questionnaire survey of 1509 fisheries cooperative associations in coastal and estuarine areas of Japan, where the possible bias of eel stocking is expected to be relatively low. Based on the questionnaire, exploitable eel (yellow and silver eels) catch and effort data from 2003 to 2018 were obtained from six fisheries cooperative associations. A standardized catch per unit effort (CPUE) was developed using a generalized linear model for each fisheries cooperative association. The results indicated that the standardized exploitable eel CPUE was significantly lower in four of the six associations. As for the other two associations, significant relationships between CPUE and year was not found. Additionally, of the 227 fisheries cooperative associations that confirmed they catch eels, 1.3%, 5.3%, 21.6%, and 71.8% answered that the eel stock is “relatively increasing,” “stable” “relatively decreasing,” or “decreasing,” respectively, with no association stating that the eel stock is “increasing.” Moreover, reported glass eel CPUE in nine prefectures in Japan was significantly lower in both periods of 1977–2018 and 2003–2018. Because the dataset used in this study is likely to be one of the best currently available, the wild Japanese eel stock appears to be currently declining in Japanese coastal and estuarine waters, where the bias of eel stocked eels on stock dynamics is thought to be relatively low.

    DOI: 10.1016/j.fishres.2019.105348

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  • Application of the discrimination model based on otolith oxygen and carbon stable isotopes: A basin-scale investigation of naturally recruiting Japanese eels in the Tone River watershed, Japan. Reviewed

    Arai K, Itakura H, Yoneta A, Kaifu K, Shirai K, Miyake Y, Kimura S

    Environmental Biology of Fishes   2019

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  • Distribution of naturally recruited wild Japanese eels in Japan revealed by otolith stable isotopic ratios and document investigation Reviewed

    YONETA AKIHITO, ITAKURA HIKARU, ARAI KOHMA, KAIFU KENZO, YOSHINAGA TATSUKI, MIYAKE YOICHI, SHIRAI KOTARO, KIMURA SHINGO

    NIPPON SUISAN GAKKAISHI   85 ( 2 )   150 - 161   2019

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Japanese Society of Fisheries Science  

    <p> To clarify the natural distribution of Japanese eels in Japan, otolith oxygen and carbon stable isotope analyses were conducted by analyzing collections of data on Japanese eels in scientific archives. The stable isotope analyses can segregate naturally recruited eels from stocked eels. As a result, coastal regions of the whole area of Kyushu, the Seto Inland Sea, the Pacific side south of Aomori Prefecture, and the Sea of Japan side south of Kyoto Prefecture were identified as main areas of natural distribution, and coastal regions from Fukui Prefecture to Aomori Prefecture facing the Sea of Japan were identified as marginal areas of natural distribution. Even in the main area, some rates of naturally recruited eels were less than 30%, suggesting that the eel resources inhabiting Japanese rivers and lakes are dependent on stocked eels.</p>

    DOI: 10.2331/suisan.18-00038

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

    Kaifu K, Yokouchi K, Higuchi T, Itakura H, Shirai K

    Fisheries Science   84   757 - 763   2018.8

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  • Discrimination of wild and cultured Japanese eels based on otolith stable isotope ratios Reviewed

    Kaifu K, Itakura H, Amano Y, Shirai K, Yokouchi K, Wakiya R, Murakami-Sugihara N, Washitani I, Yada T

    ICES Journal of Marine Science   75 ( 2 )   719 - 726   2018

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Oxford  

    We successfully discriminated wild and cultured anguillid eels without artificial tagging. For the purpose of population restoration of anguillid eels, stocking has been widely conducted in the European Union (EU) and Japan, although the net benefits of stocking remain unclear. To evaluate the effectiveness of eel stocking for population restoration, the survival, growth, escapement, and reproduction of stocked eels should be tracked. In this study, we explored the potential of using otolith oxygen and carbon stable isotope ratios as a natural tag to discriminate between wild and cultured eels, because cultured eels are often stocked into natural rivers and lakes. A discrimination model was developed based on wild (n = 95) and cultured (n = 314) Japanese eels as a training dataset. The results of accuracy estimation based on leave-one-out cross-validation were 96.8%. We then tested the applicability of the model to stocked-recaptured eels (n = 20); 100.0% were successfully identified as cultured eels, indicating that these eels spend their early continental phase in aquaculture ponds before stocking. This method could be widely applied to assess the effectiveness of eel stocking by determining the proportion of stocked eels among those captured from rivers, coastal areas, or spawning grounds.

    DOI: 10.1093/icesjms/fsx173

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  • Distribution of wild and stocked Japanese eels in the Tone River watershed revealed by otolith stable isotopic ratios. Reviewed

    Itakura H, Arai K, Kaifu K, Shirai K, Yoneta A, Miyake Y, Secor DH, Kimura S

    Journal of Fish Biology   93   805 - 813   2018

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

    Arai K, Itakura H, Yoneta A, Yoshinaga T, Shirotori F, Kaifu K, Kimura S

    Fisheries Science   83   735 - 742   2017.7

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  • Growth conditions after recruitment determine residence-emigration tactics of female Japanese eels, Anguilla japonica. Reviewed

    Wakiya R, Kaifu K, Mochioka N

    Fisheries Science   82   729 - 736   2016.7

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  • Contribution to the Understanding of Particle Motion Perception in Marine Invertebrates Invited

    Michel Andre, Kenzo Kaifu, Marta Sole, Mike van der Schaar, Tomonari Akamatsu, Andreu Balastegui, Antonio M. Sanchez, Joan V. Castell

    EFFECTS OF NOISE ON AQUATIC LIFE II   875   47 - 55   2016

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    Language:English   Publishing type:Part of collection (book)   Publisher:SPRINGER-VERLAG BERLIN  

    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 and sensitivity of their sensory organs, the statocysts, which are responsible for their equilibrium and movements in the water column. The availability of novel laser Doppler vibrometer techniques has recently opened the possibility of measuring whole body ( distance, velocity, and acceleration) vibration as a direct stimulus eliciting statocyst response, offering the scientific community a new level of understanding of the marine invertebrate hearing mechanism.

    DOI: 10.1007/978-1-4939-2981-8_6

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  • JSFS early career scientists symposium : International experiences of early career scientists on the fisheries science

    Kazuki Yokouchi, Kenzo Kaifu, Sho Hosoya

    Nippon Suisan Gakkaishi (Japanese Edition)   81 ( 5 )   873 - 881   2015.9

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    Language:Japanese   Publisher:JAPANESE SOC FISHERIES SCIENCE  

    DOI: 10.2331/suisan.81.873

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  • Synergistic patterns of threat and patchy data challenge the global conservation of anguillid eels. Reviewed

    Jacoby DMP, Casselman JM, Crook V, DeLucia MB, Hyojin Ahn H, Kaifu K, Kurwie T, Sasal P, Silfvergrip AMC, Smith KG, Uchida K, Walker AM, Gollock MJ

    Global Ecology and Conservation   4   321 - 333   2015.8

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

    YOKOUCHI KAZUKI

    NIPPON SUISAN GAKKAISHI   81 ( 4 )   635 - 635   2015

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    Language:Japanese   Publisher:The Japanese Society of Fisheries Science  

    DOI: 10.2331/suisan.81.635

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  • Asymmetric dispersal structures a riverine metapopulation of the freshwater pearl mussel Margaritifera laevis Reviewed

    Akira Terui, Yusuke Miyazaki, Akira Yoshioka, Kenzo Kaifu, Shin-ichiro S. Matsuzaki, Izumi Washitani

    ECOLOGY AND EVOLUTION   4 ( 15 )   3004 - 3014   2014.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:WILEY  

    Unidirectional water flow results in the downstream-biased, asymmetric dispersal of many riverine organisms. However, little is known of how asymmetric dispersal influences riverine population structure and dynamics, limiting our ability to properly manage riverine organisms. A metapopulation of the freshwater pearl mussel Margaritifera laevis may be sensitive to river currents because mussels are repeatedly exposed to downstream drift during floods-a parasitic life stage is the only, limited period (similar to 40 days) during which larvae (glochidia) can move upstream with the aid of host fish. We hypothesized that water-mediated dispersal would overwhelm upstream dispersal via host fish, and therefore, that upstream subpopulations play a critical role as immigrant sources. To test this hypothesis, we examined the effects of both up-and downstream immigrant sources on the size of target subpopulations in the Shubuto River system, Hokkaido, Japan. We found that target subpopulation size was dependent on the upstream distribution range of reproductive subpopulations and the number of upstream tributaries, which are proxies for the number of potential immigrants moving downstream. In contrast, little influence was observed of downstream immigrant sources (proximity to downstream reproductive subpopulations). These results were consistent even after accounting for local environments and stream size. Our finding suggests that upstream subpopulations can be disproportionately important as immigrant sources when dispersal is strongly asymmetric.

    DOI: 10.1002/ece3.1135

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

    Kenzo Kaifu, Hideaki Maeda, Kazuki Yokouchi, Ryusuke Sudo, Michael J. Miller, Jun Aoyama, Takehito Yoshida, Katsumi Tsukamoto, Izumi Washitani

    ENVIRONMENTAL BIOLOGY OF FISHES   97 ( 8 )   921 - 928   2014.8

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:SPRINGER  

    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 recruited into these areas several hundred years ago. However, recruitment there is uncertain recently, because there seems to be no study that reported glass eel or elver recruitment into the coasts along the Japan Sea for a couple of decades, and the eels inhabiting these areas were probably stocked by fisheries cooperatives. In order to improve understanding of the present-day natural geographic distribution range of this species, we searched for naturally recruited wild eels in the Hayase River system, Fukui Prefecture, which flows into the Japan Sea. Multiple approaches including investigation of glass eel recruitment, comparison of body size, and estimation of habitat use types was employed. During the observation period (from January to July 2010), no glass eels were found at the river mouth of the Hayase River in monthly sampling. Of eels collected in this study (n = 127), no eels smaller than the initial body size of eels for stocking were found in this water system and none were identified as being of wild origin based on the habitat use type classifications from otolith microchemistry (n = 48). This lack of evidence of Japanese eels recruiting into Japan Sea coast waters suggests most eels present there may be stocked eels. Japanese eels could have been distributed naturally along the Japan Sea coast more than in recent years, indicating a possible decrease of the natural distribution range of this species.

    DOI: 10.1007/s10641-013-0193-8

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

    Kazuki Yokouchi, Yasuyuki Kaneko, Kenzo Kaifu, Jun Aoyama, Kazuo Uchida, Katsumi Tsukamoto

    Fisheries Science   80 ( 3 )   543 - 554   2014

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    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 demography of A. japonica in Japan. Significant differences in biological characteristics of 6388 eels were found among the river systems. Fishery catches of eels in all locations have declined, but the magnitudes or patterns of decline seem to be different. Of sex-identified eels, mean total lengths ± SD (mm) of females (n = 3776) and males (n = 962) were 495.6 ± 104.3 and 412.9 ± 80.7, respectively, and overall sex ratio (% female) was 79.6 %. Mean age (years) and growth rate (mm year-1) were 5.0 ± 1.9 and 96.7 ± 38.6 for females (n = 3643) and 3.6 ± 1.7 and 120.5 ± 65.4 for males (n = 907), respectively. This study highlights the demographic heterogeneity of the A. japonica among the studied river systems, which suggests that it is important to conserve a variety of habitats in multiple river systems as an inclusive management target in addition to restoration of the diversity of habitats for eels in a single river system. © 2014 The Japanese Society of Fisheries Science.

    DOI: 10.1007/s12562-014-0735-9

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

    Kenzo Kaifu, Michael J. Miller, Jun Aoyama, Izumi Washitani, Katsumi Tsukamoto

    FISHERIES SCIENCE   79 ( 4 )   593 - 603   2013.7

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    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 were compared between 380 A. japonica and 221 C. myriaster juveniles in a large brackish water bay and a tributary river estuary. Almost no C. myriaster were caught in the estuary, but both species coexisted in the bay at similar densities. For both species, percentages of eels with stomach contents were greater in the morning than in the afternoon, indicating they forage at night. Both species mainly fed on benthic crustaceans in the bay, but the size of the main prey species, mud shrimp Upogebia major, was significantly larger in A. japonica. The difference in prey size appears to be related to the eel body size (A. japonica: 559.5 +/- A 88.0 mm, C. myriaster: 356.4 +/- A 56.0 mm), which probably reflects the differences in the life history-related movements of these eels, with A. japonica using the bay at large sizes and C. myriaster using the bay as a nursery area before moving to deeper water. The differences in their migratory and movement patterns may result in niche segregation in the brackish bay where both species coexist.

    DOI: 10.1007/s12562-013-0628-3

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  • 朱太川水系氾濫原の小規模な一時的水域の魚類相:種多様性の要因と保全・再生への示唆 Reviewed

    宮崎佑介, 照井 慧, 吉岡明良, 海部健三, 鷲谷いづみ

    保全生態学研究   18 ( 1 )   55 - 68   2013.5

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    We investigated the ichthyofauna of 18 temporary lentic water bodies along the river (floodplain sites), as well as reference sites including two isolated ponds, two oligotrophic wetland sites dominated by sphagnums, and four lentic tributaries (non-floodplain sites) in the Shubuto River System, SW Hokkaido. In total, 16 fish species belonging to eight families were recorded. Cluster analysis revealed three clusters containing both floodplain and non-floodplain sites and one cluster consisting of only floodplain sites. Three species, Lethenteron camtschaticum, Lethenteron sp. N, and Gymnogobius opperiens, were indicator species that were significantly associated with the only-floodplain cluster. Nestedness analysis showed that the fish species composition of the floodplain sites was significantly nested. Multiple regression and canonical correlation analyses demonstrated that fish diversity in floodplain sites was positively affected by water surface area and water depth and negatively affected by channel distance from the ocean. With reference to the results of the present study, we discussed the design of ecological restoration measures for the floodplains along the Shubuto River, which will contribute to the conservation of fish fauna.

    DOI: 10.18960/hozen.18.1_55

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

    Kenzo Kaifu, Sachie Miyazaki, Jun Aoyama, Shingo Kimura, Katsumi Tsukamoto

    ENVIRONMENTAL BIOLOGY OF FISHES   96 ( 4 )   439 - 446   2013.4

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    The diet of Japanese eels, Anguilla japonica, was investigated using stomach content and stable isotope analyses. Stable isotope enrichment of carbon and nitrogen (Delta delta C-13 and Delta delta N-15) was first estimated for A. japonica by comparing the isotopic signatures (delta C-13 and delta N-15) of reared eels to that of their food. The estimated isotope enrichment was then applied to the diet estimation of A. japonica in the Kojima Bay-Asahi River system, Japan, combined with conventional stomach content analysis. Stable isotope enrichment varied among tissues, from 0.2aEuro degrees to 0.8aEuro degrees for carbon and from 1.3aEuro degrees to 2.1aEuro degrees for nitrogen. Nitrogen isotope enrichment of A. japonica muscle estimated in this study was 2.1aEuro degrees, which was different from the previously reported mean delta N-15 enrichment of several animals of 3.4aEuro degrees. These results indicate that isotope-based diet estimations for A. japonica need to use species- and tissue-specific values of isotope enrichment. In the diet analysis, stomach contents and stable isotopes revealed that (1) A. japonica appear to usually feed on a single type of prey species in each feeding session, (2) principal prey species were mud shrimp, Upogebia major, in brackish Kojima Bay and crayfish, Procambarus clarkia, in the Asahi River, (3) A. japonica in Kojima Bay primarily depend on the pelagic food web as a carbon source due to mud shrimp being filter feeders and eels in the Asahi River primarily depend on the littoral food web. Based on these results and the recently reported eel movements between Kojima Bay and the Asahi River, it appears that A. japonica can adapt to various feeding environments as opportunists, but also utilize the food resources by targeting a single type of prey species during a single feeding session.

    DOI: 10.1007/s10641-012-0027-0

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  • Head-shape polymorphism in Japanese eels Anguilla japonica in relation to differences of somatic growth in freshwater and brackish habitats Reviewed

    K. Kaifu, K. Yokouchi, M. J. Miller, J. Aoyama, K. Tsukamoto

    JOURNAL OF FISH BIOLOGY   82 ( 4 )   1308 - 1320   2013.4

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    The age, total length (LT), head shape and skull shape were investigated for 379 Japanese eels Anguilla japonica sampled in freshwater and brackish areas of the Kojima BayAsahi River system, Okayama, Japan, to learn about the differentiation process of head-shape polymorphism. The relative mouth width (ratio of mouth width to LT) of A. japonica&gt;400mm LT collected in fresh water was significantly greater than that of fish collected in brackish water. Growth rates of mouth width and the distance from the snout to the midpoint of the eyes (the ratio of width and distance to age, respectively) were not significantly different between freshwater and brackish-water samples, whereas the somatic growth rate (the ratio of LT to age) of freshwater samples was significantly lower than that of brackish-water eel samples. These results suggest that the factors affecting head and somatic growth of A. japonica are not identical. According to these results and feeding patterns in each habitat reported by another study, it is suggested that somatic growth appears to play a significant role in the differentiation process of the head-shape polymorphism in A. japonica, with the slow-growing fish in fresh water becoming broad-headed and the fast-growing fish in brackish water becoming narrow-headed. (C) 2013 The Authors Journal of Fish Biology (C) 2013 The Fisheries Society of the British Isles

    DOI: 10.1111/jfb.12070

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  • Growth differences of Japanese eels Anguilla japonica between fresh and brackish water habitats in relation to annual food consumption in the Kojima Bay-Asahi River system, Japan Reviewed

    Kenzo Kaifu, Michael J. Miller, Takashi Yada, Jun Aoyama, Izumi Washitani, Katsumi Tsukamoto

    ECOLOGY OF FRESHWATER FISH   22 ( 1 )   127 - 136   2013.1

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    To learn about the relationships between feeding and growth of temperate eels in freshwater and brackish water habitats, we analysed 533 yellow-phase Japanese eels Anguilla japonica collected in both types of habitats in southeastern Japan. Because male eels were very rare in each habitat (FW, N = 1; BW, N = 20), characteristics of female eels were compared between the different habitats. Annual food consumption was evaluated with the consideration of instantaneous food consumption and annual activity period. Stomach fullness index (stomach content weight/body weight) was used as an indicator of instantaneous food consumption. The ratios of number of months with eel catch to those when eel sampling was conducted were used as an indicator of activity period. Female yellow eels tended to be older and slower growing in fresh water (N = 78; age, mean +/- SD = 7.9 +/- 2.4 years; growth rate, 59.8 +/- 14.0 mm year-1) than in brackish water (N = 229; age, 5.5 +/- 1.8 years; growth rate, 90.1 +/- 24.4 mm year-1). Irrespective of sex, yellow eels in brackish water had a higher stomach fullness index and a greater ratio of months with eel catches, indicating greater annual food consumption by brackish water eels. These results indicate that greater annual food consumption contributes to the greater growth rates of Japanese eels in brackish water habitats.

    DOI: 10.1111/eff.12010

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  • 福井県三方五湖−早瀬川水系におけるニホンウナギAnguilla japonica生息状況の歴史的変遷について Reviewed

    小島秀彰, 海部健三, 横内一樹, 須藤竜介, 吉田丈人, 塚本勝巳, 鷲谷いづみ

    動物考古学   29 ( 1 )   1 - 17   2012.5

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  • Preliminary evaluation of underwater sound detection by the cephalopod statocyst using a forced oscillation model Reviewed

    Kenzo Kaifu, Tomonari Akamatsu, Susumu Segawa

    Acoustical Science and Technology   32 ( 6 )   255 - 260   2011

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    To understand the mechanism of the peripheral auditory system of the cephalopod statocyst, the frequency dependence of particle motion sensitivity in cephalopods was estimated using a physical model of the sensory system, which was assumed to be forced oscillation. Reported perception thresholds of Sepia officinalis, Octopus vulgaris, and O. ocellatus fit the model well at low frequencies, whereas at frequencies above 150 Hz, the empirically measured threshold increased more steeply than the predicted increment. These results indicate that the frequency response of the perception threshold of cephalopods to particle motion can be primarily understood using the forced oscillation model, while unknown factor(s) play a role in the higher frequency range. Cephalopods are thought to be sensitive to low-frequency particle motion rather than high-frequency motion. The evolutionary function of cephalopod acoustical perception is not clear
    however, the data suggest that they recognize the low-frequency particle motion that may be generated by prey, predators, and conspecifics. © 2011 The Acoustical Society of Japan.

    DOI: 10.1250/ast.32.255

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

    Kaifu K, Tamura M, Aoyama J, Tsukamoto K

    Environmental Biology of Fishes   88 ( 1 )   273 - 282   2010.3

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  • Biological characteristics of silver-phase Japanese eels, Anguilla japonica, collected from Hamana Lake, Japan. Reviewed

    Yokouchi K, Sudo R, Kaifu K, Aoyama J, Tsukamoto K

    Coastal Marine Science   33 ( 1 )   54 - 63   2009.8

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    Other Link: http://hdl.handle.net/2261/35855

  • Underwater sound detection by cephalopod statocyst Reviewed

    Kenzo Kaifu, Tomonari Akamatsu, Susumu Segawa

    FISHERIES SCIENCE   74 ( 4 )   781 - 786   2008.8

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    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 not been conclusively ruled out. Experiments on Octopus ocellatus were conducted using respiratory activity as an indicator of sound perception. Intact animals clearly responded to 141-Hz particle motion at particle accelerations below 1.3 x 10(-3) m/s(2), and the mean perception threshold at this frequency was approximately 6.0 x 10(-4) m/s(2). Specimens in which the statoliths had been surgically removed did not show any response for accelerations up to 3.9 x 10(-3) m/s(2) at 141 Hz, which was approximately 16 dB greater than the mean perception threshold at this frequency. Specimens that had undergone a control operation in which the statoliths remained intact showed positive responses at 2.8 x 10(-3) m/s(2) for the same frequency stimulus. This indicates that the statocyst, which is morphologically similar to the inner ear system in fish, is responsible for the observed responses to particle motion in O. ocellatus. This is the first direct evidence that cephalopods detect kinetic sound components using statocysts.

    DOI: 10.1111/j.1444-2906.2008.01589.x

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  • Behavioral responses to underwater sound in the small benthic octopus Octopus ocellatus. Reviewed

    Kaifu K, Segawa S, Tsuchiya K

    The Journal of Marin Acoustical Society of Japan   34 ( 4 )   266 - 273   2007.10

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Books

  • 結局、ウナギは食べていいのか問題

    海部健三( Role: Sole author)

    岩波書店  2019.7 

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    Language:Japanese   Book type:General book, introductory book for general audience

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  • Global exploitation of freshwater eels (genus Anguilla)

    Kaifu K, Stein F, Dekker W, Walker N, Dolloff AC, Steele K, Aguirre AA, Nijman V, Siriwat P, Sasal P( Role: Joint author)

    5M Publishing  2019 

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    Responsible for pages:376-422   Language:English   Book type:Scholarly book

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  • ウナギの保全生態学

    海部健三( Role: Sole author)

    共立出版  2016.5 

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  • The Effects of Noise on Aquatic Life II

    André M, Kaifu K, Solé M, van der Schaar M, Akamatsu T, Balastegui A, Sánchez AM, Castell JV( Role: Joint author)

    Springer  2016 

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  • 生態学 基礎から保全

    鷲谷いづみ, ほか( Role: Joint author)

    培風館  2016 

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  • 保全生態学の挑戦 空間と時間のとらえ方

    宮下直 西廣淳( Role: Joint author第一章「東アジアのつながり ニホンウナギの保全と持続可能な利用」を担当)

    東京大学出版会  2015.6 

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    Total pages:237   Responsible for pages:18   Language:Japanese   Book type:Scholarly book

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  • うな丼の未来 ウナギの持続的利用は可能か

    東アジア鰻資源協議会日本支部編( Role: Joint author「IUCNウナギレッドリスト会議報告」および「あとがき」を担当)

    青土社  2013.10 

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    Total pages:275   Responsible for pages:16   Language:Japanese   Book type:Scholarly book

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  • わたしのウナギ研究

    海部健三( Role: Sole author)

    さ・え・ら書房  2013.4 

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  • ウナギの博物誌

    黒木真理( Role: Joint author担当:第四章 pp.95-114 汽水域に生息するウナギと人)

    化学同人  2012.11 

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MISC

  • Conservation and restoration of growth habitat of Japanese eel, Anguilla japonica: does "Ishikura-kago" contribute population restoration?

    KAIFU Kenzo, WAKIYA Ryoshiro

    Ecology and Civil Engineering   22 ( 1 )   109 - 115   2019

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:Ecology and Civil Engineering Society  

    DOI: 10.3825/ece.22.109

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  • 日本におけるニホンウナギの保全と持続的利用に向けた取り組みの現状と今後の課題

    海部健三, 水産庁, 環境省自然環境局野生生物課, 望岡典隆, パルシステム生活協同組合連合会, 山岡未季, 黒田啓行, 吉田丈人

    生態学会誌(学術情報)   68   43 - 57   2018.4

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  • 水圏生物の行動情報の取得5-福井県久々子湖におけるニホンウナギの湖岸の種類ごとの利用率の比較

    竹野遼馬, 高木淳一, 三田村啓理, 市川光太郎, 荒井修光, 海部健三, 脇谷量子郎, 板倉光, 矢田崇, 石井潤

    平成29年度日本水産学会春季大会   2017.3

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  • 河川におけるニホンウナギの保全生態学的研究-その6-ニホンウナギの河川内分布

    横内一樹, 海部健三, 板倉光, 脇谷量子郎, 吉永龍起, 望岡典隆, 木村伸吾, 木村伸吾

    日本水産学会大会講演要旨集   2017   2017

  • 河川におけるニホンウナギの保全生態学的研究-その2 耳石安定同位体比を利用したニホンウナギの天然遡上個体と放流個体の識別法の開発

    板倉光, 海部健三, 天野洋典, 白井厚太郎, 横内一樹, 脇谷量子郎, 杉原奈央子, 鷲谷いづみ, 矢田崇

    日本水産学会大会講演要旨集   2017   2017

  • 河川におけるニホンウナギの保全生態学的研究-その4-西郷川・川棚川におけるニホンウナギの分布を規定する要因

    鶴川亮太, 横内一樹, 矢吹海, 脇谷量子郎, 海部健三, 板倉光, 望岡典隆

    日本水産学会大会講演要旨集   2017   2017

  • 河川におけるニホンウナギの保全生態学的研究-その7-淡水域におけるニホンウナギのマイクロハビタット

    脇谷量子郎, 横内一樹, 海部健三, 板倉光, 吉永龍起, 望岡典隆, 木村伸吾, 木村伸吾

    日本水産学会大会講演要旨集   2017   2017

  • 河川におけるニホンウナギの保全生態学的研究-その3-全国および利根川における天然遡上個体の分布

    木村伸吾, 板倉光, 荒井考磨, 荒井考磨, 米田彬史, 米田彬史, 海部健三

    日本水産学会大会講演要旨集   2017   2017

  • 河川におけるニホンウナギの保全生態学的研究-その1-ニホンウナギの減少と保全生態学

    海部健三, 木村伸吾, 木村伸吾, 白井厚太郎, 望岡典隆, 横内一樹, 吉永龍起, 板倉光, 脇谷量子郎

    日本水産学会大会講演要旨集   2017   2017

  • バイオロギングによる水圏生物の行動情報の取得3 福井県久々子湖におけるニホンウナギの行動圏および日祝行動

    竹野遼馬, 市川光太郎, 荒井修亮, 三田村啓理, 高木淳一, 海部健三

    平成28年度日本水産学会春季大会   2016.3

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  • Monitoring of Japanese eel Anguilla japonica by fine-scale positioning system in the Lake Kugushi, Fukui, Japan

    Ryoma Takeno, Kotaro Ichikawa, Nobuaki Arai, Hiromichi Mitamura, Junichi Takagi, Kenzo Kaifu, Takashi Yada

    The 4th Design Symposium on Conservation of Ecosystem (SEASTAR2000)   2016.3

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  • 利根川水系におけるニホンウナギの自然分布に関する研究

    荒井考磨, 荒井考磨, 板倉光, 米田彬史, 米田彬史, 海部健三, 木村伸吾, 木村伸吾

    日本水産学会大会講演要旨集   2016   2016

  • 対馬暖流域におけるニホンウナギ自然分布の可能性

    米田彬史, 米田彬史, 板倉光, 荒井考磨, 海部健三, 木村伸吾

    水産海洋学会研究発表大会講演要旨集   2016   2016

  • 利根川水系におけるウナギ属魚類の分布生態に関する研究

    荒井考磨, 荒井考磨, 板倉光, 米田彬史, 米田彬史, 吉永龍起, 海部健三, 木村伸吾, 木村伸吾

    日本魚類学会年会講演要旨   49th   2016

  • ウナギ属魚類の分布生態学的研究

    荒井考磨, 板倉光, 米田彬史, 米田彬史, 吉永龍起, 海部健三, 木村伸吾

    水産海洋学会研究発表大会講演要旨集   2016   2016

  • 利根川水系における外来ウナギの分布状況

    荒井考磨, 荒井考磨, 板倉光, 米田彬史, 米田彬史, 吉永龍起, 海部健三, 木村伸吾, 木村伸吾

    日本水産学会大会講演要旨集   2016   2016

  • 日本におけるニホンウナギの分布に関する研究

    米田彬史, 米田彬史, 荒井考磨, 荒井考磨, 板倉光, 海部健三, 木村伸吾, 木村伸吾

    日本水産学会大会講演要旨集   2016   2016

  • 河川横断構造物がニホンウナギの遡上に与える影響

    板倉光, 板倉光, 海部健三, 木村伸吾, 木村伸吾

    日本生態学会大会講演要旨(Web)   62nd   2015

  • 河川横断構造物がニホンウナギの河川内分布に与える影響

    板倉光, 海部健三, 木村伸吾

    水産海洋学会研究発表大会講演要旨集   2015   2015

  • ニホンウナギ天然加入個体/放流個体識別法とその応用

    海部健三, 天野洋典, 板倉光, 板倉光, 杉原奈央子, 白井厚太朗, 横内一樹, 大竹二雄, 木村伸吾, 木村伸吾, 鷲谷いづみ, 矢田崇

    日本水産学会大会講演要旨集   2014   2014

  • 河口堰がニホンウナギの遡上に与える影響

    板倉光, 板倉光, 海部健三, 木村伸吾, 木村伸吾

    日本水産学会大会講演要旨集   2014   2014

  • 岡山県児島湾・旭川水系のウナギ資源量はシラス漁の停止後に回復したか

    海部健三, 横内一樹, MILLER Michael J., 青山潤, 鷲谷いづみ, 塚本勝巳

    日本水産学会大会講演要旨集   2013   2013

  • 耳石酸素・炭素安定同位体比を利用したニホンウナギ天然加入個体/放流個体識別方の開発

    海部健三, 天野洋典, 板倉光, 横内一樹, 白井厚太朗, 大竹二雄, 木村伸吾, 鷲谷いづみ, 矢田崇

    日本水産学会大会講演要旨集   2013   2013

  • 安定同位体比を用いたウナギ幼生の餌料環境と親魚に関する研究

    宮崎幸恵, 宮崎幸恵, 金煕容, 山田祥朗, 海部健三, 須藤竜介, 北川貴士, 木村伸吾

    日本水産学会大会講演要旨集   2008   2008

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Presentations

  • 河川における放流ニホンウナギの生残・成長・移動

    脇谷量子郎, 板倉光, 松谷紀明, 宮田克士, 飯田益生, 平江多績, 眞鍋美幸, 矢田崇, 海部健三

    令和2年度日本水産学会春季大会  2020  日本水産学会

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  • Current status of Japanese eel stock. Invited International conference

    Kaifu K

    The 3rd ISTEGA  ( Manado )   2019.8 

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  • 奄美大島におけるオオウナギの年齢・成長・性

    脇谷量子郎, 板倉光, 海部健三

    平成31年度日本水産学会春季大会  ( 東京 )   2019.3 

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  • ウナギ属魚類は水域の生物多様性のシンボル種になる

    板倉光, 脇谷量子郎, 海部健三

    平成31年度日本水産学会春季大会  ( 東京 )   2019.3 

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  • Otolith stable isotope ratios revealed decline of wild Japanese eels; a case study in Okayama, Japan.

    Kaifu K, Yokouchi K, Shirai K

    The 6th international Otolith Symposium  2018.4 

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  • 天然および養殖ニホンウナギの競合試験

    脇谷量子郎, 今吉雄二, 海部健三

    平成30年度日本水産学会春季大会  ( 東京 )   2018.3 

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  • How science can contribute to conservation and sustainable use of Japanese eel?

    The 1st international eel symposium,  2017.6 

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  • Discrimination of wild and stocked Japanese eels based on otolith stable isotope ratios

    Itakura H, Amano Y, Shirai K, Yokouchi K, Wakiya R, Murakami-Sugihara N, Washitani I, Yada T

    The 1st international eel symposium  2017.6 

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  • バイオロギングによる水圏生物の行動情報の取得3 福井県久々子湖におけるニホンウナギの行動圏および日周行動

    竹野遼馬, 市川光太郎, 荒井修亮, 三田村啓理, 高木淳一, 矢田崇

    平成29年度日本水産学会春季大会  2017.3 

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  • 河川におけるニホンウナギの保全生態学的研究−その7− 淡水域におけるニホンウナギのマイクロ・ハビタット

    脇谷量子郎, 横内一樹, 板倉光, 吉永龍起, 望岡典隆, 木村伸吾

    平成29年度日本水産学会春季大会  2017.3 

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  • 河川におけるニホンウナギの保全生態学的研究−その6− ニホンウナギの河川内分布

    横内一樹, 板倉光, 脇谷量子郎, 吉永龍起, 望岡典隆, 木村伸吾

    平成29年度日本水産学会春季大会  2017.3 

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  • 河川におけるニホンウナギの保全生態学的研究−その5− 酒匂川においてニホンウナギの分布を規定する要因

    白鳥史晃, 中里翔, 板倉光, 脇谷量子郎, 白井厚太郎, 戸井田伸一, 吉永龍起

    平成29年度日本水産学会春季大会  2017.3 

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  • 河川におけるニホンウナギの保全生態学的研究−その4− 西郷川・川棚川におけるニホンウナギの分布を規定する要因

    鶴川亮太, 横内一樹, 脇谷量子郎, 板倉光, 望岡典隆

    平成29年度日本水産学会春季大会  2017.3 

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  • 河川におけるニホンウナギの保全生態学的研究−その3− 全国および利根川における天然遡上個体の分布

    木村伸吾, 板倉光, 荒井考麿, 米田彬史

    平成29年度日本水産学会春季大会  2017.3 

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  • 河川におけるニホンウナギの保全生態学的研究−その2− 耳石安定同位体比を利用した天然遡上個体と放流個体の識別法の開発

    板倉光, 天野洋典, 白井厚太郎, 横内一樹, 脇谷量子郎, 杉原奈央子, 鷲谷いづみ, 矢田崇

    平成29年度日本水産学会春季大会  2017.3 

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  • 河川におけるニホンウナギの保全生態学的研究 –その1− ニホンウナギの減少と保全生態学

    木村伸吾, 白井厚太郎, 望岡典隆, 横内一樹, 吉永龍起, 板倉光, 脇谷量子郎

    平成29年度日本水産学会春季大会  2017.3 

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  • Freshwater eel conservation and Geochemistry

    Kaifu K, Shirai K

    Japan Geoscience Union Meeting 2016  2016.5 

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  • 河川横断構造物がニホンウナギの河川内分布に与える影響

    板倉光

    2015年度水産海洋学会研究発表大会  2015.10 

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  • Recent activities for conservation and sustainable use of eels in Japan

    2015 annual meeting of the East Asia Eel Resource Consortium  2015.8 

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  • 河川横断構造物がニホンウナギの遡上に与える影響

    板倉光

    第62回日本生態学会  2015.3 

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  • 河口堰がニホンウナギの遡上に与える影響

    板倉光

    平成26年度日本水産学会秋期大会  2014.9 

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  • Recent activities for eels conservation in Japan

    Kaifu K, Yoshinaga T

    The 2014 annual meeting of the East Asia Eel Resource Consortium  2014.9 

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  • Ghrelin and food acquisition in Japanese eel

    Yada et

    The 7th Asia and Oceania Society for Comparative Endocrinology  2014.3 

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  • ニホンウナギ天然加入個体/放流個体の識別法とその応用

    海部健三

    平成26年度日本水産学会春季大会  2014.3 

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  • ニホンウナギ放流の現状と課題

    海部健三, 鷲谷いづみ

    第61回日本生態学会大会  2014.3 

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  • 耳石酸素・炭素安定同位体比を利用したニホンウナギ天然加入個体/放流個体識別法の開発

    海部健三

    平成25年度日本水産学会秋季大会  2013.9 

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  • Particle motion perception in cephalopod statocyst

    Kaifu K, Andre M, Akamatsu T

    BIT' s 2nd World Congress of Ocean- 2013  2013.9 

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  • Report on the Japanese eel symposium.

    The 16th East Asia Eel Resource Consortium  2013.9 

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  • Eel river project

    Shinoda et

    The 16th East Asia Eel Resource Consortium  2013.9 

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  • 河川遡上期のウナギにおけるコルチゾルと関連遺伝子の動態

    矢田崇他

    第84回日本動物学会大会  2013.9 

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  • ニホンウナギの保全における河口域の重要性

    海部健三, 青山潤, 塚本勝巳, 鷲谷いづみ

    第60回日本生態学会大会  2013.3 

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  • ニホンウナギは河口域で若齢期を過ごす

    海部健三

    平成25年度日本水産学会春季大会  2013.3 

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  • 岡山県児島湾・旭川水系のウナギ資源量はシラス漁の停止後に回復したか

    海部健三

    平成25年度日本水産学会春季大会  2013.3 

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  • Eel River Project: Monitoring glass eel recruitment.

    Mochioka N e

    The 15th EASEC, Keelung  2012.11 

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  • What factor is limiting Japanese eel stock, recruitment or spawning?

    Kaifu K

    The 15th EASEC, Keelung  2012.11 

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  • 鰻川計画:シラスウナギ来遊量調査

    望岡典隆

    平成24年度日本水産学会秋季大会  2012.9 

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  • 生息域の異なるニホンウナギの摂餌量と成長速度

    海部健三

    平成24年度日本水産学会秋季大会  2012.9 

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  • Historical changes of Japanese eel distribution in Japan revealed by multidisciplinary approach.

    Kaifu K e

    The 6th WFC, Edinburgh.  2012.5 

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  • ウナギにおけるグレリンと摂食状態の関係

    矢田崇, 海部健三, 海谷啓之, 塚本勝巳

    平成24年度日本水産学会春季大会  2012.3 

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  • ニホンウナギ頭部形態多型の分化機構

    海部健三

    平成24年度日本水産学会春季大会  2012.3 

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  • Participatory biodiversity monitoring for information sharing in restoration and conservation programs: a case in Mikata-goko Lake system, Japan.

    Kaifu K, Terui A, Matsuzaki S, Washitani I

    Estuary and lagoon ecosystem trajectories, Bordeaux  2011.11 

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  • ニホンウナギとマアナゴの資源分割

    海部健三, 青山潤, 塚本勝巳

    平成23年度日本水産学会秋季大会  2011.9 

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  • Ecology of Japanese eels Anguilla japonica in the Kojima Bay-Asahi River system, Japan.

    Kiafu K

    The 2nd GCOE Joint Seminar, Fukuoka  2011.2 

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  • Properties of underwater sound detection in cephalopods.

    Kaifu K, Akamatsu T, Segawa S

    CIAC2009, Vigo  2009.9 

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  • Distribution of Japanese eels Anguilla japonica in the Kojima Bay-Asahi River system

    Kaifu K, Tamura M, Aoyama J, Tsukamoto K

    The 5th WFC, Yokohama  2008.10 

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  • Particle motion perception in cephalopods.

    Kaifu K, Segawa S, Akamatsu T

    米国音響学会  2007.12 

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  • イイダコの聴覚(粒子運動感覚)および頭足類の平衡胞と魚類の内耳の類似性

    海部健三, 赤松友成, 瀬川進

    平成19年度日本水産学会春季大会  2007.3 

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  • Hearing in octopus.

    Kaifu K, Segawa S, Tsuchiya K

    CIACl2006  2006.2 

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Awards

  • 平成26年度日本水産学会論文賞

    2015.3   日本水産学会  

    Yokouchi K, Kaneko Y, Kaifu K, Aoyama J, Uchida K, Tsukamoto K

  • The Joint 2nd Prize for Early Career Poster Award

    2012.5   World Fisheries Congress   Historical changes of Japanese eel distribution in Japan revealed by multidisciplinary approach.

  • 日本水産学会論文賞

    2009.3   日本水産学会   Underwater sound detection by cephalopod statocyst.

Research Projects

  • Development of feasible eel stocking method with high effect and low risk

    Grant number:22H00371  2022.4 - 2027.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)  Grant-in-Aid for Scientific Research (A)  Chuo University

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    Grant amount: \41730000 ( Direct Cost: \32100000 、 Indirect Cost: \9630000 )

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  • STEAMの理念を取り入れた総合的・基礎的な理科必修科目に関するカリキュラム研究

    Grant number:22H01071  2022.4 - 2026.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)  National Astronomical Observatory of Japan

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    Authorship:Coinvestigator(s) 

    Grant amount: \14300000 ( Direct Cost: \11000000 、 Indirect Cost: \3300000 )

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  • 分野横断型研究による日本列島におけるニホンウナギ分布変遷の復元

    2022.4 - 2024.3

    中央大学  中央大学共同研究プロジェクト 

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    Grant type:Competitive

    Grant amount: \9972000

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  • 学際的視点に基づく、東アジアにおけるニホンウナギの保全と持続的利用の課題整理

    2021.11 - 2023.3

    中央大学  研究クラスター形成支援 

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    Grant type:Competitive

    Grant amount: \3250000

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  • Comparative study of the international management frameworks for Anguillid eels between EU and East Asia

    Grant number:19KK0292  2020.4 - 2023.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Fund for the Promotion of Joint International Research (Fostering Joint International Research (A))  Fund for the Promotion of Joint International Research (Fostering Joint International Research (A))  Chuo University

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    Authorship:Principal investigator 

    Grant amount: \14690000 ( Direct Cost: \11300000 、 Indirect Cost: \3390000 )

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  • 耳石安定同位体比を利用したニホンウナギの天然加入個体/放流個体の分布状況の解明

    2018.4 - 2022.3

    文部科学省  科学研究費補助金(日本学術振興会・文部科学省)-基盤研究(B) 

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    Grant type:Competitive

    Grant amount: \17030000

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  • ウナギ属魚類の保全と持続的利用に向けた総合研究

    2018.4 - 2020.3

    中央大学 

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    Grant type:Competitive

    Grant amount: \10000000

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  • 平成30年度鰻来遊・生息調査事業

    2018.4 - 2019.3

    水産庁  受託研究費 

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    Grant type:Competitive

    Grant amount: \2300000

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  • 平成30年度効果的な放流手法検討事業

    2018.4 - 2019.3

    水産庁  受託研究費 

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    Grant type:Competitive

    Grant amount: \9000000

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  • 平成29年度内水面資源生息環境改善手法開発事業

    2017.4 - 2018.3

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    Grant type:Competitive

    Grant amount: \2300000

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  • 平成29年度鰻来遊・生息調査事業

    2017.4 - 2018.3

    水産庁  受託研究費 

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    Grant type:Competitive

    Grant amount: \2300000

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  • 平成29年度効果的な放流手法検討事業

    2017.4 - 2018.3

    水産庁  受託研究費 

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    Grant type:Competitive

    Grant amount: \10000000

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  • 平成28年度ニホンウナギ保全方策検討委託業務

    2016.4 - 2017.3

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    Grant type:Competitive

    Grant amount: \7300000

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  • 平成28年度内水面資源生息環境改善手法開発事業

    2016.4 - 2017.3

    水産庁  受託研究費 

    矢田崇

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    Grant type:Competitive

    Grant amount: \2300000

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  • 平成28年度鰻来遊・生息調査事業

    2016.4 - 2017.3

    水産庁  受託研究費 

    山本敏博

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    Grant type:Competitive

    Grant amount: \2000000

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  • 平成28年度効果的な放流手法検討事業

    2016.4 - 2017.3

    水産庁  受託研究費 

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    Grant type:Competitive

    Grant amount: \7000000

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  • 養殖ウナギ放流効果の検討 銀ウナギへの天然個体/放流個体識別法の適用

    2015.10 - 2016.3

    日本養鰻漁業協同組合連合会(水産庁補助事業)  受託研究費 

    海部健三

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount: \2000000

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  • 養殖ウナギと天然ウナギの混養試験

    2015.10 - 2016.3

    鹿児島県ウナギ資源増殖対策協議会  奨学寄付金 

    海部健三

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount: \1350000

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  • ウナギの保全と持続的利用を促進するコーディネーターの雇用

    2015.10 - 2016.3

    ロンドン動物学会  奨学寄付金 

    海部健三

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount: \1195000

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  • 平成27年度ニホンウナギ保全方策検討委託業務

    2015.4 - 2016.3

    環境省  受託研究費 

    海部健三

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount: \20000000

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  • 養殖鰻の放流効果の検証

    2014.6 - 2015.3

    日本養鰻漁業協同組合連合会(水産庁補助事業)  受託研究費 

    海部健三

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount: \2000000

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  • 平成26年度ニホンウナギ保全方策検討委託業務

    2014.4 - 2015.3

    環境省  受託研究費 

    海部健三

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount: \15000000

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  • 経験水温の相違を利用した、ニホンウナギの天然加入個体と放流個体の識別法の開発

    2013.4 - 2015.3

    文部科学省  科学研究費補助金(日本学術振興会・文部科学省)-若手研究(B) 

    海部健三

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount: \4160000

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Allotted class

  • 2023   基礎演習1   Department

  • 2023   基礎演習2   Department

  • 2023   導入演習 A   Department

  • 2023   環境科学   Department

  • 2023   生命の科学1   Department

  • 2023   生命の科学2   Department

  • 2023   科学と人間1   Department

  • 2023   科学と人間2   Department

  • 2023   総合講座1 MINAMATA1   Department

  • 2023   総合講座1 ウナギの保全と持続的利用   Department

  • 2023   総合講座1 水産資源の持続的利用   Department

  • 2023   自然科学3[生物学]   Department

  • 2023   Global Sustainability Science特論   Graduate school

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Committee Memberships

  • 2015.12 - Now

    Anguillid Eel Specialist Group, Species Survival Committee, IUCN   Member  

  • 2016 -  

    高梁川生態系回復に向けた検討会   検討委員  

  • 2015 -  

    鹿児島県ウナギ資源増殖対策協議会   学識経験者