Kajita Tadashi

写真a

Title

Professor

Researcher Number(JSPS Kakenhi)

80301117

Homepage URL

http://nesseiken.info

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Current Affiliation Organization 【 display / non-display 】

  • Concurrently   University of the Ryukyus   Graduate School of Agriculture   Professor  

  • Concurrently   University of the Ryukyus   The United Graduate School of Agricultural Sciences, Kagoshima University   Professor  

  • Duty   University of the Ryukyus   Tropical Biosphere Research Center   Professor  

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University 【 display / non-display 】

  • 　
    -
    1989

    Tohoku University   Faculty of Science   Graduated

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Graduate School 【 display / non-display 】

  • 　
    -
    1991.03

    Tohoku University  Graduate School, Division of Natural Science  Doctor's Course (first term)  Completed

  • 　
    -
    1994.03

    Tohoku University  Graduate School, Division of Natural Science  Doctor's Course (second term)  Completed

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External Career 【 display / non-display 】

  • 2015.05
    　
    　

    University of the Ryukyus, Tropical Biosphere Research Center, Professor  

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Research Interests 【 display / non-display 】

  • 分子系統学

  • 保全生物学

  • マングローブ

  • マメ科

  • Sea-dispersal

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Research Areas 【 display / non-display 】

  • Life Science / Biodiversity and systematics

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Published Papers 【 display / non-display 】

  • Rediscovery of Malaysia's marine tardigrades after over half a century: a new species (Batillipes malaysianus sp. nov.) and a new record of B. rotundiculus

    CA Chen, WL Ng, ST Teng, T Kajita

    JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM   105   2025.06 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    • Access this article
      DOI

  • Mangrove aboveground biomass estimation using UAV imagery and a constructed height model in Budeng–Perancak, Bali, Indonesia

    Mohammad Basyuni, Alfian Mubaraq, Rizka Amelia, Anindya Wirasatriya, Sigit Bayhu Iryanthony, Bejo Slamet, Shofiyah S. Al Mustaniroh, Novia Arinda Pradisty, Frida Sidik, Rizki Hanintyo, Elham Sumarga, Siti H. Larekeng, Severino G. Salmo, Tadashi Kajita, Hayssam M. Ali, Anjar Dimara Sakti, Virni B. Arifanti

    Ecological Informatics   86 ( May 2025, 103037 )   2025.05 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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      DOI Open Access

  • Morphological and molecular monitoring of fishes in the waters of mangrove eco-systems

    M. Basyuni, Irmawati, A. Mubaraq, A. Susilowati, A.B. Rangkuti, Desrita, A.A. Aznawi, S.S. Al Mustaniroh, S.H. Larekeng, A.H. Salman, E.R. Ardli, Y. Isowa, T. Kajita

    Global Journal of Environmental Science and Management   11 ( 2 ) 711 - 732   2025.03 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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      DOI

  • Reduction of mangrove carbon stock ecosystems due to illegal logging using a combination of unmanned aerial vehicle imagery and field surveys

    M. Basyuni, R. Amelia A.A. Aznawi, A. Wirasatriya S.B. Iryanthony, B. Slamet S.S. Al Mustaniroh, R.Rahmania, Y.I. Rahmila, E. Sumarga, S.H. Larekeng, S. Salmo III, T. Kajita, I. Sivaipram, H.M. Ali

    Global Journal of Environmental Science and Management   11 ( 41 ) 225 - 242   2025.02 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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      DOI

  • Application of eDNA metabarcoding in the assessment of fish biodiversity in Philippine mangroves: Challenges and opportunities

    Camila Frances P. Naputo, Yukinobu Isowa, Maria Elisa Gerona-Daga, Ma Daniela Artigas, Tadashi Kajita, Severino G. Salmo

    Regional Studies in Marine Science   77   2024.12 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    Biodiversity assessments are important in designing mangrove conservation and restoration programs. In the Philippines, conventional biodiversity assessment methods (e.g., trap nets, fish visual census) can be time-consuming, labor-intensive, and expensive. In recent years, environmental DNA (eDNA) metabarcoding has been an emerging tool for rapid biodiversity monitoring as it is fast, non-intrusive, and can provide broader detection of fauna. But, it is still subject to various field sampling and laboratory analysis constraints. Here, we applied the eDNA metabarcoding method to document and assess fish biodiversity in mangroves from two biogeographic regions in the Philippines: Oriental Mindoro in the West Philippine Sea and Sorsogon in the Northern Philippine Sea. Using 12S genetic markers from eDNA water samples, we detected 89 fish species from 44 families. Only twelve species were commonly detected in both sites. Several species were found in the Philippines' list of economically important aquatic organisms while one species (Epinephelus fuscoguttatus) was classified as Vulnerable in IUCN's Red List of Threatened Species. Seventy-six percent more species were detected in Sorsogon probably because the sampling sites were within a seascape of mangroves, seagrasses, and coral reefs. In contrast, the lesser species detected in Oriental Mindoro could probably be because of the more limited sampling points to coastal fringes. Our results serve as baseline data and the first obtained using this method in the country. However, we observed some limitations that should be addressed to improve the method: (1) lack or absence of a comprehensive reference database specific to Philippine aquatic organisms; (2) low eDNA reads which could be attributed to insufficient on-site filtration due to turbid seawaters common in Philippine mangroves; and (3) possible cross-contaminations that can affect comparative analyses. Despite these limitations, we were able to demonstrate the usefulness of this technique in doing rapid assessments which could address knowledge gaps in Philippine mangrove biodiversity studies and contribute to its conservation programs.

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      DOI Open Access

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Other Papers 【 display / non-display 】

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Work 【 display / non-display 】

  • Field works for the study of patropic sea-current seed dispersal plants

    1997
    　
    　
     

  • Phylogegraphical study of pantropic sea-current seed dispersal plants

    1997
    　
    　
     

  • Molecular systematic study of Desmodieae(Leguminosae)

    1994
    　
    　
     

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