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Affiliation |
Faculty of Agriculture Region of Animal and Plant Biosciences |
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Title |
Professor |
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Related SDGs |
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SAKAMOTO Shinsuke
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Degree 【 display / non-display 】
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Ph.D. (Science) ( 2013.3 Tokyo Metropolitan University )
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M.Sc.(Environmental Science) ( 2002.3 University of Tsukuba )
Research Interests 【 display / non-display 】
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Social behaviors
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ecology
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Seasonal reproduction
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stress response
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animal personality
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communication
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野生動物
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畜産環境
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養鶏
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Natal dispersal
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なわばり
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アフリカヤマネ
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デグー
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アカネズミ
Research Areas 【 display / non-display 】
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Life Science / Ecology and environment
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Life Science / Biodiversity and systematics
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Environmental Science/Agriculture Science / Radiation influence
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Life Science / Animal physiological chemistry, physiology and behavioral biology
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Life Science / Laboratory animal science
Campus Career 【 display / non-display 】
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University of Miyazaki Faculty of Agriculture Region of Animal and Plant Biosciences Professor
2025.04 - Now
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University of Miyazaki Faculty of Agriculture Department of Animal and Grassland Sciences Professor
2022.08 - 2025.03
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University of Miyazaki Center for Animal Disease Control Division of Livestock Production Research & Support Associate Professor
2021.04 - Now
Country：Japan
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University of Miyazaki Faculty of Agriculture Department of Animal and Grassland Sciences Associate Professor
2020.01 - 2022.07
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University of Miyazaki Faculty of Agriculture Department of Animal and Grassland Sciences Lecturer
2015.06 - 2019.12
Papers 【 display / non-display 】
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Optimization of inhaled anesthesia for <i>Octodon degus</i> using electroencephalography Reviewed
Ikai Yuki, Nagura-Kato Goro A., Sakamoto Shinsuke H., Shinohara Akio, Koshimoto Chihiro
Experimental Animals 74 ( 1 ) 93 - 103 2025.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Japanese Association for Laboratory Animal Science
Physiological responses to inhaled anesthetics vary among species. Therefore, a precise anesthetic technique is important for each individual species. In this study, we focused on the degu (<i>Octodon degus</i>), a small herbivorous rodent. Degus have recently begun to be used as laboratory models for brain research because of certain human-like characteristics, such as spontaneous development of Alzheimer’s disease. In this study, we evaluated appropriate induction and maintenance anesthesia conditions for isoflurane and sevoflurane in degus by a stimulation test, electroencephalography (EEG), minimum alveolar concentration (MAC), and vital signs. During induction, more rapid time to loss of the righting reflex and deeper anesthesia in degus were observed in isoflurane. The MAC value for degus were 1.75 ± 0.0% in isoflurane and 2.25 ± 0.27% in sevoflurane. Whereas some degus were awake during maintenance anesthesia using both anesthetics at concentrations of ≤2%, no rats were awake when using sevoflurane at a concentration of 2%. The duration of the total flat EEG, a measure of the depth of maintenance anesthesia, was longer for isoflurane than for sevoflurane. Furthermore, higher concentrations of both anesthetics suppressed the respiratory rate in degus. These new findings regarding inhalation anesthesia in degus will contribute to future developments in the fields of laboratory animals and veterinary medicine.
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Ishiniwa H., Okano T., Endoh D., Hirayama H., Yoshioka A., Yokohata Y., Shindo J., Koshimoto C., Shinohara A., Sakamoto S.H., Tamaoki M., Onuma M.
Scientific Reports 14 ( 1 ) 29706 2024.11
Language：English Publishing type：Research paper (scientific journal) Publisher：Scientific Reports
The Fukushima Daiichi Nuclear Power Plant accident caused the release of large amounts of radioactive material into the environment. Radiation from radionuclides cause DNA lesions, mainly via oxidation, which adversely affect wild organisms by damaging their germ cells. Here, we investigated the effects of radiation on the reproductive organs of Japanese field mice (Apodemus speciosus) by estimating the dose rate of radiation exposure, the accumulation of DNA lesions, and the expression of DNA repair enzymes. In highly contaminated areas, mouse testes received a radiation dose rate > 0.1 mGy/d. According to the International Commission on Radiological Protection, there is a very low probability of effects in the reference rat species at this exposure level. The results of the current study do not definitively conclude that the expression of 8-oxoguanine DNA glycosylase 1 and superoxide dismutase in mouse testes increase with dose rate and lifetime dose. However, 8-hydroxy-2′-deoxyguanosine accumulation increases in a dose rate- and lifetime dose-dependent manner in mouse testes, but is not observed in the sperm of the cauda epididymis. These results suggest that, although DNA lesions occurred in male germ cells of Fukushima mice, most were successfully repaired by DNA repair enzymes at the observed gene expression level.
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Kodama T., Sakamoto S.H., Mori A.
Proceedings of the Royal Society B: Biological Sciences 291 ( 2027 ) 20240719 2024.7
Language：English Publishing type：Research paper (scientific journal) Publisher：Proceedings of the Royal Society B: Biological Sciences
Understanding how environmental factors affect the performance of predators can provide profound insights into predator-prey interactions from evolutionary and ecological perspectives and the global distributional patterns of each taxon. Almost all venomous predators are ectotherms, with muscle contraction properties depending on temperature. For predators having venom transportation systems driven by muscle contraction, temperature may have quite large effects on envenomation performance for prey subjugation. Here, we used videography and enzyme-linked immunosorbent assay to examine thermal effects on envenomation kinematics and venom expenditure in predatory strikes of a venomous snake, the Mamushi Gloydius blomhoffii, to its main rodent prey at various body temperatures under both field and laboratory experimental conditions. Unexpectedly, we found that the thermal effects on envenomation performance are limited over nearly the entire ecologically relevant range of temperature (from 13.2°C to 26.2°C). Although temperature statistically significantly affected the mass of venom injected under field conditions, temperature explained only a minor proportion of the variation in venom expenditure. These findings suggest that the Mamushi is able to maintain prey subjugation performance across a wide range of temperatures, which is highly advantageous for ectothermic predators. Further studies should examine the underlying mechanisms of the limited thermal effects and their ubiquity across venomous predators.
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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
Language：English 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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Long-term behavioral effects of social separation during early life in a social mammal, Octodon degus. Reviewed
Ukyo R, Shinohara A, Koshimoto C, Nagura-Kato GA, Ieiri S, Tsuzuki Y, Sakamoto SH
Scientific reports 13 ( 1 ) 9518 2023.6
Authorship：Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
Books 【 display / non-display 】
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脳とホルモンの行動学, 行動神経内分泌学への招待
近藤 保彦/小川 園子/菊水 健史/山田 一夫/富原 一哉【編】（ Role： Contributor , 季節繁殖, 休眠）
西村書店 2023.3
Language：Japanese Book type：Textbook, survey, introduction
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農業技術体系, 最新農業技術 畜産
坂本信介, 畔柳聴, 小林郁雄（ Role： Joint author , 野生動物の牧場への侵入の実態と特徴）
農山漁村文化協会 2018.11
Total pages：240 Responsible for pages：70-81 Language：Japanese Book type：Scholarly book
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日本のネズミ: 多様性と進化
本川雅治（編），佐藤淳，西岡佑一郎，新宅勇太，友澤森彦，島田卓哉，坂本信介，越本知大，城ヶ原貴通，鈴木仁，新井智（ Role： Contributor , アカネズミの社会行動―雌の分散行動の可塑性）
東京大学出版会 2016.10
Total pages：342 Responsible for pages：129-150 Language：Japanese Book type：Scholarly book
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大・中・小動物実験プロトコール
宮崎大学動物実験プロトコール編集委員会（ Role： Joint author , 編集, 2-2, 4-4, 5-5）
宮日文化情報センター 2016.3
Language：Japanese Book type：Textbook, survey, introduction
MISC 【 display / non-display 】
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野生動物が関わる問題にどのように対応するか？～基礎研究を応用した解決への取り組み Invited
石庭 寛子, 坂本 信介, 松波 雅俊, 石塚 真由美, 淺野 玄, 伊吾田 宏正, 大沼 学
哺乳類科学 57 ( 1 ) 149 - 150 2017.7
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal)
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Ishiniwa Hiroko, Eto Takeshi, Sakamoto Shinsuke, Onuma Manabu, Kubota Yoshihisa, Koshimoto Chihiro
Honyurui Kagaku (Mammalian Science) 55 ( 1 ) 67 - 69 2015.7
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：The Mammal Society of Japan
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齧歯類の雌の社会行動の多型と可塑性
坂本信介
九州実験動物雑誌 30 15 - 18 2014.10
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：九州実験動物研究会
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Societies of short-lived rodents : seasonally plastic individual relationships
SAKAMOTO Shinsuke
Honyurui Kagaku (Mammalian Science) 52 ( 1 ) 75 - 78 2012.6
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution) Publisher：The Mammal Society of Japan
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SAKAMOTO Shinsuke, TOMOZAWA Morihiko
Honyurui Kagaku (Mammalian Science) 52 ( 1 ) 136 - 138 2012.6
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution) Publisher：The Mammal Society of Japan
Presentations 【 display / non-display 】
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エアコンのセンサ技術を応用した家畜の体温・体調測定システム Invited
坂本信介，宮内輝，佐々木渉，木村亜紀，上田健介
アグリビジネス創出フェア2024 2024.11.27
Event date： 2024.11.26 - 2024.11.28
Language：Japanese Presentation type：Symposium, workshop panel (public)
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ネット式電気柵はアナグマ被害に苦しむ農家の味方になるのか
室屋敦紀，末松謙一，宇佐美二朗，迫中千晴，坂本信介
第10回山岳科学学術集会 第29回「野生生物と社会」学会 合同大会 2024.12.14
Event date： 2024.12.13 - 2024.12.15
Language：Japanese Presentation type：Poster presentation
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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 2024.10.31
Event date： 2024.10.31 - 2024.11.1
Language：Japanese Presentation type：Oral presentation (general)
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齧歯類の生態学 2024 種内変異―染色体から個性
坂本信介，島田卓哉，齊藤 隆，田村典子
日本哺乳類学会2024年度大会 2024.9.7
Event date： 2024.9.6 - 2024.9.9
Language：Japanese Presentation type：Symposium, workshop panel (public)
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低コストなTDIR方式の赤外線センサでアカネズミと実験用マウスの体温変動を推定する
坂本信介，右京里那，宮内 輝，西牟田 勇哉，長谷川 美鳳，高木 和也，杵鞭 健太，奥田 悟崇，徳永 忠昭，小林郁雄
日本哺乳類学会2024年度大会 2024.9.7
Event date： 2024.9.6 - 2024.9.9
Language：Japanese Presentation type：Oral presentation (general)
Awards 【 display / non-display 】
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日本哺乳類学会大会ポスター賞
2017.9 日本哺乳類学会 コウベモグラおよびヒミズの消化管内微生物叢の比較
篠原明男※・井上比加里・稲留健人・樫村 敦・江藤 毅・加藤悟郎・坂本信介・越本知大
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
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日本哺乳類学会大会ポスター賞
2013.9 日本哺乳類学会 食性の異なる小型哺乳類の消化管内微生物叢の分子生態学的比較解析
井上比加里, 酒井悠輔, 坂本信介, 森田哲夫, 越本知大, 篠原明男
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
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2013 Mammal Study論文賞
2013.9 日本哺乳類学会
Sakamoto SH, Suzuki SN, Degawa Y, Koshimoto C, Suzuki RO
Award type：Honored in official journal of a scientific society, scientific journal Country：Japan
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日本哺乳類学会2010年度大会ポスター優秀賞
2010.9 日本哺乳類学会
坂本信介，鈴木惟司，篠原明男，越本知大
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
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第55回日本生態学会ポスター優秀賞（行動部門）
2008.3 日本生態学会
坂本信介
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
Grant-in-Aid for Scientific Research 【 display / non-display 】
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小型哺乳類の成体雌雄間と親子間の季節応答のギャップ
Grant number：24K09596 2024.04 - 2028.03
日本学術振興会 科学研究費基金 基盤研究(C)
坂本信介
Authorship：Principal investigator
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光周性に依存しない季節繁殖：季節繁殖の多様性を説明しうる新たなメカニズムの探求
Grant number：20K15865 2020.04 - 2025.03
独立行政法人日本学術振興会 科学研究費基金 若手研究
Authorship：Principal investigator Grant type：Competitive
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哺乳類の季節繁殖の性差：RNAseqを用いた遺伝的基盤と多様化の仕組みの解明
Grant number：17K07537 2017.04 - 2023.03
科学研究費補助金 基盤研究(C)
坂本信介、石庭寛子，大沼学，續木靖浩
Authorship：Principal investigator
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哺乳動物の季節繁殖制御機構に性差を構築するメカニズムの解明
Grant number：24657018 2012.04 - 2016.03
科学研究費補助金 挑戦的萌芽研究
坂本信介、越本知大
Authorship：Principal investigator
本研究は、季節繁殖の進化プロセスにおいて雌雄で異なる選択圧が作用するとの仮説を、繁殖期に希有な地理的変異を示す我が国固有の齧歯類アカネズミを用いて検証した。
具体的には、季節的な繁殖生理応答に性差が存在するかをまず確かめた上で、繁殖期が形成されるメカニズムを検証し、「哺乳動物の季節繁殖制御機構に性差を構築する要因の解明」および「将来的な光周性研究に好適な齧歯類材料の探索」を目的とした研究をおこなった。 -
農業ICT化に向けた畜舎内での小動物行動追跡システムの構築
Grant number：17K00240 2017.04 - 2020.03
科学研究費補助金 基盤研究(C)
椋木雅之、坂本信介
Authorship：Coinvestigator(s)
Other research activities 【 display / non-display 】
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野生動物が関わる問題にどのように対応するか？～基礎研究を応用した解決への取り組み～ーシンポジウム記録
2016.03
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動物行動学図説 家畜・伴侶動物・展示動物
2012.07
哺乳類科学，第52巻，144–145，に書評が掲載された
Available Technology 【 display / non-display 】
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家畜・動物園動物・愛玩動物・実験動物の適正飼養管理に関する研究
暖温帯地域における野生動物の保全と管理に関する研究
動物のユニークな生態・行動・生理現象の解明に関する研究Home Page： 宮崎大学農学部
Related fields where technical consultation is available：・さまざまな動物の行動観察や解析が必要な研究
・野生動物・希少動物の保全に関する研究
・動物を用いた実験的検証が必要な研究