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Affiliation |
Faculty of Agriculture Region of Animal and Plant Biosciences |
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Title |
Assistant Professor |
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Laboratory Phone number |
0985-58-7197 |
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Contact information |
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Related SDGs |
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UKYO Rina
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Degree 【 display / non-display 】
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博士（農学） ( 2023.9 宮崎大学 )
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修士（農学） ( 2020.3 宮崎大学 )
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学士（農学） ( 2018.3 宮崎大学 )
Research Interests 【 display / non-display 】
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Octodon degus
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Social separation
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Early-life stress
Research Areas 【 display / non-display 】
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Life Science / Laboratory animal science
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Humanities & Social Sciences / Experimental psychology
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Life Science / Animal physiological chemistry, physiology and behavioral biology
Education 【 display / non-display 】
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University of Miyazaki Interdisciplinary Graduate school of Agriculture and Engineering
2020.4 - 2023.9
Country：Japan
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University of Miyazaki Graduate School of Agriculture, Masters Coarse
2018.4 - 2020.3
Country：Japan
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University of Miyazaki
2014.4 - 2018.3
Country：Japan
Papers 【 display / non-display 】
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Rina Ukyo, Akio Shinohara, Chihiro Koshimoto, Goro A. Nagura-Kato, Seiji Ieiri, Yasuhiro Tsuzuki, Shinsuke H. Sakamoto
Scientific Reports 13 ( 1 ) 9518 2023.6
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
File： Ukyo2023Long-term.pdf
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Tone M., Ukyo R., Sakamoto S.H., Hemmi K., Kobayashi I., Tsuzuki Y.
Cryo-Letters 44 ( 5 ) 307 - 313 2023.9
Publishing type：Research paper (scientific journal) Publisher：Cryo-Letters
BACKGROUND: Cryopreservation of porcine oocytes is difficult compared with other species and immature oocytes particularly so compared to the meiotic stage. OBJECTIVE: To evaluate the efficacy of a pretreatment with 1 μM paclitaxel (PTX, 30 min exposure) before vitrification to promote the maturation of porcine immature oocytes. MATERIALS AND METHODS: Cumulus cell-enclosed oocytes (COs) aspirated from porcine ovaries were divided into three groups: i) non-pretreated with PTX and non-vitrified group (control group); ii) pretreated with PTX and vitrified group (PTX-V group); and iii) non-pretreated with PTX and vitrified group (nPTX-V group). RESULTS: The nuclear maturation rate up to the preovulatory stage was significantly lower (P<0.05) in the nPTX-V group than in the control group, but was similar in the PTX-V and control groups. No significant differences were observed in viability assessed by a normal CO morphology and the embryonic development of oocytes activated by the parthenogenetic stimulation between the PTX-V and control groups, but not the non-PTX-V group. CONCLUSION: PTX may promote the maturation of vitrified porcine immature oocytes.
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Kuroyanagi A., Ukyo R., Kodama Y., Eto T., Okubo Y., Kobayashi I., Ieiri S., Morita T., Sakamoto S.H.
Mammal Study 47 ( 3 ) 2022.7
Authorship：Lead author Publishing type：Research paper (scientific journal) Publisher：Mammal Study
This study illustrated body temperature (Tb) fluctuation during reproduction and discussed the effectiveness of measuring Tb for predicting the reproductive profile of female Apodemus speciosus both under laboratory and field conditions. Tb fluctuation was monitored for four breeding events in the laboratory and for three in the field. Individual variation in Tb fluctuation during reproduction was larger in the field than in the laboratory, while its temporal pattern was clearer in the field than in the laboratory. Tb fluctuating patterns according to the progress of the reproductive stage were similar between the laboratory and the field. Daily mean Tb increased after the start of pregnancy, decreased during late pregnancy, rapidly increased after parturition, and remained higher through the lactation period. In particular, the following three characteristics should be apparent indices of parturition: increase of daily mean Tb and daily minimum Tb in early pregnancy, decrease of daily max Tb and daily mean Tb in late pregnancy, and increase of daily max Tb at the day of parturition. These results indicate that implanting small-sized loggers enables us to obtain a representative pattern of Tb fluctuation and to predict the reproductive profile of female A. speciosus, both under laboratory and field conditions.
DOI： 10.3106/ms2021-0048
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SAKAMOTO Shinsuke H., MIYAMOTO Yasuyuki, UKYO Rina, IEIRI Seiji
Journal of Veterinary Medical Science 84 ( 5 ) 653 - 659 2022.1
Language：English Publishing type：Research paper (scientific journal) Publisher：JAPANESE SOCIETY OF VETERINARY SCIENCE
To strengthen farm biosecurity, wildlife behaviors around livestock environments require significant attention. Livestock feed is considered one of essential factors that attract wildlife to the livestock environment. We experimentally studied wildlife response to cattle, swine, and chicken concentrated feeds in the forests surrounding poultry farms. In 14 feeding sites, four feed conditions were established: without feed (control); cattle feed; chicken feed; and swine feed. Wildlife behaviors at each feed point were monitored using infrared cameras. In 3,175 videos, 10 mammals were photographed on 10 or more occasions. Wildlife more frequently appeared at the points with feed than without feed. In addition, the number of videos that captured foraging or interest behaviors was largest for swine feed, followed by chicken feed, then cattle feed. There was a large difference among wildlife in their response to livestock feeds, although each species did not have a strong preference for a specific feed. Livestock feeds invite frequent visits by high and moderate response groups, especially omnivores and carnivores with omnivorous tendencies. Therefore, to protect against such wildlife intrusion, leftover feed and feed storage must be properly managed. This study also suggests that livestock feeds may not cause intrusions by rare response group species; hence, if their intrusions occur, they may be due to factors other than livestock feed. The study situation can partly reflect actual feed-stealing situations. The results will contribute to consider the properly management to protect livestock environments from wildlife intrusions.
DOI： 10.1292/jvms.21-0627
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牧場施設内外および季節間での野生哺乳類の出現頻度の差異 Reviewed
坂本信介、畔柳聴、右京里那、小林郁雄、家入誠二
日本暖地畜産学会報 62 ( 2 ) 99 - 105 2019.7
Language：Japanese Publishing type：Research paper (scientific journal)
Presentations 【 display / non-display 】
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ブタ卵母細胞の体外成熟に及ぼすフルオキセチンの影響
渡邉媛圭・右京里那・邉見広一郎・續木靖浩
第18回 日本暖地畜産学会佐賀大会 2025.10.25
Event date： 2025.10.25 - 2025.10.26
Language：Japanese Presentation type：Oral presentation (general)
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行動・姿勢指標を用いた豚の分娩検知精度の検討
石井彩夏、江川紗智子、徳永忠昭、坂本信介、右京里那、橋本果林、宮野大輝、杉浦陽介、平山祐理
第121回日本養豚学会大会
Event date： 2024.10.31 - 2024.11.1
Presentation type：Oral presentation (general)