TAOKA Yosuke



Faculty of Agriculture Department of Marine Biological and Environmental Science



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Degree 【 display / non-display

  • Doctor (Fishery) ( 2007.3   Kagoshima University )

Research Areas 【 display / non-display

  • Life Science / Applied microbiology

  • Life Science / Aquatic bioproduction science


Papers 【 display / non-display

  • Effects of u ltra f ine b ubble s on the w ater q uality in a c losed r ecirculating s ystem for 3 Tilapia Oreochromis niloticus and the microbiome in the rearing water Reviewed

    Yousuke T AOKA , Teruki K UROKI , Yasuhiro K ODOI , Eisei S AKATA and Chikashi K AMI MURA

    Aquaculture Science   2024.7

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

  • Effects of Hot-Spring Water Culture on the Nutritional Value of Muscle from Japanese Eel Anguilla japonica Reviewed

    Ishimaru M., Uchida K., Taoka Y., Matsumoto T., Tanaka R.

    Journal of Aquatic Food Product Technology   33 ( 1 )   33 - 48   2024

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    Publishing type:Research paper (scientific journal)   Publisher:Journal of Aquatic Food Product Technology  

    The chemical composition of muscles from Japanese eels cultured in hot-spring water was determined and compared with that of eels cultured in well water. The proximate composition did not differ significantly between the culture conditions, but the hepatosomatic indices of the hot-spring water eels were significantly higher than those of the well water eels. Amino acid levels were higher in the hot-spring water eels, and the carnosine content of the hot-spring eels was lower than that of the controls. Our results suggest that hot-spring water is a promising medium for eel culture, and its use may bring energy cost savings.

    DOI: 10.1080/10498850.2023.2277855


  • PUFA and carotenoid producing thraustochytrids and their anti-microbial and antioxidant activities Reviewed

    Kaliyamoorthy K., Chavanich S., Kandasamy K., Ponnuvel M., Kamlangdee N., Taoka Y., Viyakarn V.

    Frontiers in Marine Science   10   2023

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    Publishing type:Research paper (scientific journal)   Publisher:Frontiers in Marine Science  

    Thraustochytrids contribute to the microbiota of mangrove ecosystem, and they hold promise as a potential source of polyunsaturated fatty acids (PUFAs), antimicrobials and antioxidants for their application in pharmaceutical, aquaculture, and human health sectors. However, the thraustochytrids have not been properly studied in Indian mangrove ecosystems for their PUFAs and biological activities, and hence, the present study was carried to isolate the PUFAs-rich thraustochytrids for their pigments, antimicrobial and antioxidant properties. This work isolated and identified the thraustochytrids that are capable of producing PUFAs from decomposing leaves of mangroves at Pichavaram, southeast coast of India. Two predominant isolates were identified as Thraustochytrium sp. and Aurantiochytrium mangrovei based on morphological and molecular characteristics. Thraustochytrium sp., produced the biomass of 4.72 g L-1, containing total lipids of 42.36% and docosahexaenoic acid (DHA) of 32.69% of total lipids, whereas, A. mangrovei produced the biomass of 6.25 g L-1 containing total lipids of 49.81% and DHA of 44.71% of total lipids. Astaxanthin pigment accumulated up to 3.2 µg L-1 in A. mangrovei, whereas the pigment was not detected in Thraustochytrium sp. Further, the biomass extracted in organic solvents was tested for antibacterial activity against seven clinical pathogens along with positive control of ampicillin. Thraustochytrium sp., exhibited the highest antibacterial activity with the zone of inhibition of 78.77% against Staphylococcus aureus and the lowest (20.95%) against Klebsiella pneumonia. Thraustochytrium sp., also showed minimum inhibitory concentration (MIC) of 40 µg L-1 inhibiting the growth of S. aureus. The antioxidant activity of A. mangrovei was tested by using six assays and noted the highest free radical scavenging (87.37 ± 1.22%) and the lowest nitric oxide radical scavenging (75.12 ± 2.22%) activities. Hence, it is clear that the extracts of Thraustochytrium sp., and A. mangrovei are promising sources of lead compounds for biopharma and food industries.

    DOI: 10.3389/fmars.2023.1126452


  • Identification and characterization of pathogenic bacteria isolated from dead masu salmon Oncorhynchus masou masou and antibacterial activity of probiotic Lactococcus lactis subsp. lactis strain K-C2 against isolated pathogens Reviewed

    Yasaka Y., Binh P.T., Hayami Y., Tanaka R., Uchida K., Taoka Y.

    Fisheries Science   89 ( 1 )   41 - 51   2022.12

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

    We focused on developing an epidemic prevention method for circulating masu salmon aquaculture using the probiotic Lactococcus lactis strain K-C2. This study aimed to evaluate the antibacterial activities of strain K-C2 against pathogens isolated from dead Yamame and masu salmon. First, we identified pathogenic bacteria that were isolated from dead masu salmon based on phylogenetic analysis of the 16S rRNA gene sequence and biological and biochemical characterization. The antibacterial activity of strain K-C2 against seven pathogenic strains isolated from dead masu salmon in this study and two strains of Aeromonas salmonicida previously isolated from dead Yamame was tested using a double agar plate method. The results of a BLAST search using 16S rRNA partial sequence data (1200–1300 bp) revealed that six of the former strains and one of the latter strains showed high similarity to Vibrio anguillarum and Tenacibaculum maritimum, respectively. Strain K-C2 showed antibacterial activity against all pathogenic bacteria. In this study, pathogenic bacteria were newly isolated from dead seawater-acclimated masu salmon, and strain K-C2 was found to have antibacterial effects against these pathogens.

    DOI: 10.1007/s12562-022-01648-4


  • Effect of the probiotic Lactococcus lactis subsp. lactis strain K-C2 on the release of amino acids from aquafeeds, and on the intestinal microflora of amberhack, Seriola dumerili and common carp, Cyprinus carpio following administration as a feed additive Invited Reviewed International coauthorship

    Yousuke Taoka, Yuki Hayami, Phan Trong Binh, Yurie Yasaka


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

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Books 【 display / non-display

  • 低分子カキ由来ペプチドは腸内細菌叢のdysbiosisと免疫抑制を緩和することルイス肺がんマウスにおけるシクロホスファミド化学療法による副作用を改善する

    田岡洋介, 阪口真帆( Role: Joint author)

    先端医学社  2023.8 

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    Language:Japanese Book type:Scholarly book

  • 水産増養殖におけるプロバイオティクスの可能性と物質代謝から見た作用機序の解明

    田岡洋介・Nguyen Thi Hue Linh( Role: Joint author)

    北隆館  2020.10 

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    Language:Japanese Book type:Scholarly book

MISC 【 display / non-display

  • シベリアチョウザメを原料とした蒲鉾の製造および評価 Reviewed

    矢野原泰士,田岡洋介, 山口徹, 松浦史哉, 羽太拓未, 北垣世蓮, 別府和樹

    南九州大学紀要   2023.12

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    Publishing type:Rapid communication, short report, research note, etc. (bulletin of university, research institution)  

  • 水産増養殖におけるプロバイオティクスの可能性と物質代謝から見た作用機序の解明 Invited International coauthorship

    田岡洋介・Nguyen Thi Hue Linh

    アグリバイオ   2021.5

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    Authorship:Lead author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

  • Effects of cold shock treatment on total lipid content and fatty acid composition of Aurantiochytrium limacinum strain mh0186

    Taoka Y., Nagano N., Okita Y., Izumida H., Sugimoto S., Hayashi M.

    Journal of Oleo Science   60 ( 5 )   217 - 220   2011

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (bulletin of university, research institution)   Publisher:Journal of Oleo Science  

    To examine the effect of cold shock treatment on the fatty acid composition of Aurantiochytrium limacinum strain mh0186, a marine thraustochytrid, we cultivated this strain at 28°C for 72 h with shaking and stored the obtained biomass at 10°C for 72 h. A growth experiment was carried out for comparison, wherein strain mh0186 was grown at 10 and 15°C for 72 h with shaking, and it was found that the unsaturation of fatty acids was accelerated relative to that at 28°C. In the cold shock experiment, the total lipid content signifi cantly increased during storage at 10°C for 72 h. Overall, the percentage of unsaturated fatty acids such as docosahexaenoic acid was almost stable while that of n-6 docosapentaenoic acid decreased slightly, but signifi cantly, relative to that in the growth experiment. © 2011 by Japan Oil Chemists' Society.

    DOI: 10.5650/jos.60.217


Presentations 【 display / non-display

  • Lactococcus lactis subsp. lactis K-C2株による 養魚飼料由来代謝物のメタボローム解析 International coauthorship

    早見 祐紀・並木よしの・Phan Trong Binh・八坂友里恵・ 田岡洋介

    日本水産学会九州支部大会  2023.12.9 

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    Event date: 2023.12.8 - 2023.12.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  • Effect of oral administration of Aurantiochytrium sp. strain mem0039 cells on immune responses of common carp, Cyprinus carpio Invited International conference

    Yousuke Taoka, Ms. Shizuki Okamoto, Mungkornpan Santiwijai

    The 11th Annual World Congress of Ocean  2023.11.17 

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    Event date: 2023.11.15 - 2023.11.17

    Language:English   Presentation type:Oral presentation (general)  

  • チョウザメ魚醤の速醸化の検討

    矢野原泰士・田岡洋介・梅津和歩・山本瑞貴* 田島良亮・黒田明大・細田蓮也

    日本水産学会春季大会  (オンライン開催(大会本部:東京海洋大学内))  日本水産学会

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    Event date: 2021.3.26 - 2021.3.30

    Language:English   Presentation type:Oral presentation (general)  


  • Complete replacement of fishmeal in aquafeeds for carp, Cyprinus carpio with lipid-extracted residue derived from a thraustochytrid Aurantiochytrium sp. mem0039 Invited International conference

    Noriyuki Tai, Horii Kenya, Yousuke Taoka

    International Conference on Aquaculture and Fisheries in Bangkok  (Bangkok, Thailand) 

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    Event date: 2019.11.11 - 2019.11.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Bangkok, Thailand  

  • プロバイオティクスを用いた魚病予防法の開発


    動物用ワクチン-バイオ医薬品研究会 シンポジウム 

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    Event date: 2019.9.12

    Language:English   Presentation type:Oral presentation (general)  

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Awards 【 display / non-display

  • 平成23年度日本水産学会論文賞

    2012.3   公益社団法人日本水産学会  

    田岡洋介、前田広人、Jae-Yoon JO、Min-Jee JEON、Sungchul C. BAI、Won-Jae LEE、弓削寿哉、越塩俊介

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    Award type:International academic award (Japan or overseas)  Country:Japan

  • 平成18年度日本防菌防黴学会論文賞

    2006.5   鹿児島大学  

    塩崎靖志、前田広人、田岡洋介、越塩俊介、吉川毅、坂田泰造、C. Saclauso

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

Other research activities 【 display / non-display

  • 宮崎県西都産養殖鯉を用いた機能性魚醤油の開発

    2021.04 - 2022.03

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  • 平成30年度拡充(ソフト)事業"細島いわがき"成分検査事業

    2018.04 - 2019.03

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  • TECH PLANTER 2018 宮崎大会


  • 宮崎県日向市沿岸の水質調査とブランド化に関わる研究


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  • 宮崎県高鍋町沿岸海水質調査


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Available Technology 【 display / non-display

  • 乳酸菌を用いた機能性成分強化発酵食品の開発


    Home Page: 研究室ホームページ

    Related fields where technical consultation is available:・発酵微生物の単離・同定や最適培養条件の探索