研究者業績

嶌本 樹

Tatsuki Shimamoto

基本情報

所属
日本獣医生命科学大学 獣医学部獣医保健看護学科 講師
学位
博士(農学)(岩手大学大学院連合農学研究科)

J-GLOBAL ID
201801011090225030
researchmap会員ID
B000292303

論文

 32
  • T. Shimamoto, T. Taki, A. Kumaki, A. Motohashi, H. Tamatani, G. Oshima, J. Tanaka, T. Yamamoto
    Journal of Zoology 2024年8月30日  査読有り筆頭著者責任著者
    Abstract Hair hormone analysis has received increasing attention in the fields of wildlife management and conservation over the last decade. However, few studies focused on sex steroid hormones, even though hair sex steroid hormone analysis has the potential to provide information on an individual's reproductive health, leading to a better understanding of animal reproductive biology and the assessment of individual and population health. Here, we tested the assay validation and examined whether hair progesterone concentration (HPC) differs between different sexes and age classes in the Asian black bear, Ursus thibetanus. We also investigated the effects of reproductive condition, age, and body condition index (BCI) on HPC to determine the utility of hair progesterone analysis in bears. The assay validation was reported in our study. We found a significantly higher HPC in adult females than in juvenile females and juvenile and adult males. In addition, we found no effects of age and BCI on HPC but a significant positive effect of reproductive condition, as the HPC in breeding adult females was significantly higher than in nonbreeding adult females. These results suggest that hair progesterone analysis has the potential to evaluate the reproductive condition of Asian black bears.
  • Yu Takahata, Kenta Uchida, Nobuyuki Kutsukake, Tatsuki Shimamoto, Yushin Asari, Yohey Terai
    Conservation Genetics 2024年8月13日  査読有り
    Abstract Human activities often induce maladaptive effects in urban wildlife, such as increased inbreeding and decreased gene flow, consequently leading to a loss of biodiversity. Although maladaptive effects are commonly reported in urban wildlife, some wildlife species are not affected. Understanding the conditions and factors that affect the genetic structure of wildlife is crucial for its conservation in urban environments. Eurasian red squirrels Sciurus vulgaris in Obihiro City, Hokkaido, Japan, have settled in large residential lots with a high risk of vehicle collisions for approximately 30 years, raising the possibility that the urban population would be genetically isolated from nearby rural populations and may experience a rapid decrease in genetic diversity. In this study, we analysed the population structure, genetic distance, and nucleotide diversity of squirrels in the Obihiro area using genome-wide single nucleotide polymorphisms (SNPs). Principal component analysis and ADMIXTURE showed that urban and rural squirrel populations formed distinct clusters with intermediate urban and rural boundary populations. Genetic distances between the urban populations were greater than that of other pairs. Nucleotide diversities were lower in urban populations than in other populations, suggesting limited gene flow between urban and other populations, possibly due to urbanisation. The change in the genetic characteristics of urban squirrel populations during this short period demonstrates the strong impact of urbanisation. Our findings suggest that a genome-wide approach to the genetic structure of wildlife contributes to its conservation in urban environments.
  • 江口 勇也, 佐久間 幹大, 舩越 優実, 東 典子, 嶌本 樹, 片平 浩孝
    保全生態学研究 2024年  査読有り
  • Ayaka Hata, Anna Inoue, Yasuhiro Nakajima, Hikaru Uno, Tomoko Naganuma, Tatsuki Shimamoto
    Rapid Communications in Mass Spectrometry 2024年  査読有り責任著者
  • 嶌本樹, 古荘寿奈
    保全生態学研究 2024年  査読有り筆頭著者責任著者

MISC

 11

書籍等出版物

 3

講演・口頭発表等

 45

担当経験のある科目(授業)

 10

共同研究・競争的資金等の研究課題

 2

学術貢献活動

 1

メディア報道

 3

その他

 5
  • 2022年4月 - 2022年4月
    日本野生動物医学会学生部会主催パネルディスカッション(招聘講師)
  • 2019年6月 - 2019年6月
    日獣サイセンスセミナー
  • 2018年6月 - 2018年6月
    関東交流会(日本野生動物医学会学生部会関東地区主催) 招聘講師
  • 2017年5月 - 2017年5月
    北海道野生動物交流会(日本野生動物医学会学生部会北海道地区主催) 招聘講師
  • General and Comparative Endocrinology, Basic and Applied Ecology, Urban Ecosystems, Journal of Ethology, Mammal Study, 日本野生動物医学会誌、哺乳類科学