Current Affiliation Organization 【 display / non-display 】

Current Affiliation Organization 【 display / non-display 】

External Career 【 display / non-display 】

External Career 【 display / non-display 】

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Research Interests 【 display / non-display 】

Research Interests 【 display / non-display 】

Research Areas 【 display / non-display 】

Research Areas 【 display / non-display 】

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Published Papers 【 display / non-display 】

Published Papers 【 display / non-display 】

• Estimating individual exposure to predation risk in group-living baboons, Papio anubis.

  Suire A, Kunita I, Harel R, Crofoot M, Mutinda M, Kamau M, Hassel JM, Murray S, Kawamura S, Matsumoto-Oda A

  PloS one ( Public Library of Science (PLoS) )  18 ( 11 ) e0287357 - e0287357   2023 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

  　View Summary

  In environments with multiple predators, vulnerabilities associated with the spatial positions of group-living prey are non-uniform and depend on the hunting styles of the predators. Theoretically, coursing predators follow their prey over long distances and attack open areas, exposing individuals at the edge of the group to predation risk more than those at the center (marginal predation). In contrast, ambush predators lurk unnoticed by their prey and appear randomly anywhere in the group; therefore, isolated individuals in the group would be more vulnerable to predators. These positions of vulnerability to predation are expected to be taken by larger-bodied males. Moreover, dominant males presumably occupy the center of the safe group. However, identifying individuals at higher predation risk requires both simultaneous recording of predator location and direct observation of predation events; empirical observations leave ambiguity as to who is at risk. Instead, several theoretical methods (predation risk proxies) have been proposed to assess predation risk: (1) the size of the individual ‘unlimited domain of danger’ based on Voronoi tessellation, (2) the size of the ‘limited domain of danger’ based on predator detection distance, (3) peripheral/center position in the group (minimum convex polygon), (4) the number and direction of others in the vicinity (surroundedness), and (5) dyadic distances. We explored the age-sex distribution of individuals in at-risk positions within a wild baboon group facing predation risk from leopards, lions, and hyenas, using Global Positioning System collars. Our analysis of the location data from 26 baboons revealed that adult males were consistently isolated at the edge of the group in all predation risk proxies. Empirical evidence from previous studies indicates that adult male baboons are the most frequently preyed upon, and our results highlights the importance of spatial positioning in this.

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• A Three-Dimensional Scanning System for Digital Archiving and Quantitative Evaluation of Arabidopsis Plant Architectures.

  Kunita I, Morita MT, Toda M, Higaki T

  Plant & cell physiology     2021.05 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Three-dimensional reconstruction of Arabidopsis plant architecture

  Kunita Itsuki, Kinjo Airi, Toda Masashi, Higaki Takumi

  PLANT MORPHOLOGY ( The Japanese Society of Plant Morphology )  33 ( 1 ) 67 - 69   2021

  Type of publication: Research paper (scientific journal)

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  <p>Non-destructive three-dimensional reconstruction is required to precisely determine plant morphology and its changes. We developed a space-efficient and low-cost three-dimensional reconstruction system for plant architecture of <i>Arabidopsis thaliana,</i> which can be easily obtained in laboratories specializing in plant science. In this system, images of a plant rotating at low speed on a rotator are captured by a camera from multiple directions and a three-dimensional image is reconstructed based on the visual volume intersection method. The accuracy of the three-dimensional reconstruction was verified using a three-dimensional model of known size and shape. It was observed that 360 images captured at intervals of approximately 1° were sufficient to obtain accurate three-dimensional images with submillimeter resolution and high shape reproducibility. Our system is expected to contribute to the promotion of multi-dimensional phenotyping of plant architectures.</p>

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• Millimeter-sized belt-like pattern formation of actin filaments in solution by interacting with surface myosin in vitro

  Kentaro Ozawa, Hirotaka Taomori, Masayuki Hoshida, Itsuki Kunita, Shigeru Sakurazawa, Hajime Honda

  Biophysics and Physicobiology ( Biophysics and Physicobiology )  16   1 - 8   2019.01 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Behavioural differentiation induced by environmental variation when crossing a toxic zone in an amoeba

  Kunita I.

  Journal of Physics D: Applied Physics ( Journal of Physics D: Applied Physics )  50 ( 35 )   2017.08

  Type of publication: Research paper (scientific journal)

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Other Papers 【 display / non-display 】

Other Papers 【 display / non-display 】

• Cellular Ethological Dynamics in Diorama Environments

  Nishigami, Y; Kunita, I; Sato, K; Nakagaki, T

  JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN ( Journal of the Physical Society of Japan )  92 ( 12 )   2023.12  [Refereed]

   

  DOI

• Proposal of a self-organizing formation building Model based on difference in behavior due to Baboon sexage attributes

  Nonoka HOMMA, Akiko MATSUMOTO, Itsuki KUNITA

      1F2-02   2023.12  [Refereed]

   

• A customer behavior classification method using trajectory clustering

  Kanon MIYAZATO, Itsuki KUNITA

      2E2-06   2023.12  [Refereed]

   

• The physarum model by membrane potential change proceed growing

  Megumi UZA, Itsuki KUNITA

      2B2-02   2023.12  [Refereed]

   

• Effects of interactions between agents on swarm control in multi-shephering.

  Keigo NAKADA, Akiko MATSUMOTO, Itsuki KUNITA

      1F2-04   2023.12  [Refereed]

   

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Presentations 【 display / non-display 】

Presentations 【 display / non-display 】

• アクチンフィラメントの末端を数ナノメートルの精度で観察

  圓福 光, 三谷 隆大, 國田 樹, 本多 元

  第61回 日本生物物理学会年会  2023.11  -  2023.11 

• Slow Time-Constant Channel Responses Driving Intellectual Behavior in Paramecium

  Itsuki Kunita

  Diorama-Ethology Ciliate Workshop  2023.11  -  2023.11 

• Effects of sizes of self-organized patterns composed by vascular endothelial cells on vasculogenesis

  Akiko Nakamasu, Masamune Nakayama, Naoto Shingu, Hirofumi Izuhara, Yuji Nashimoto, Itsuki Kunita, Yuichiro Arima, Yoshimi Yamaguchi, Koichi Nishiyama, Ryuji Yokokawa, Takashi Miura

  The 50th Annual Meeting of the Japanese Society of Developmental Biologists  2017.05  -  2017.05 

• Vascular Intraluminal Pressure Load Inhibits Vessel Elongation during Angiogenesis

  Yuichiro Arima, Itsuki Kunita, Shinya Yuge, Ryuji Yokokawa, Takashi Miura, Naoki Mochizuki, Shigetomo Fukuhara, Koichi Nishiyama

  2017.03  -  2017.03 

• A relationship between optimized transport network and a biological scaling law

  Dai Akita, Itsuki Kunita, Mark Fricker, Shigeru Kuroda, Katsuhiko Sato, Toshiyuki Nakagaki

  The 17th RIES-Hokudai International Symposium  2016.12  -  2016.12 

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Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• Grant-in-Aid for Scientific Research(C)

  Project Year: 2023.04  -  2027.03 

  Direct: 3,600,000 (YEN)  Overheads: 4,680,000 (YEN)  Total: 1,080,000 (YEN)

• Heuristic algorithm of exploration and exploitation to the space geometry in ciliates and amoebae

  Grant-in-Aid for Transformative Research Areas (A)

  Project Year: 2021.09  -  2026.03 

  Direct: 92,400,000 (YEN)  Overheads: 120,120,000 (YEN)  Total: 27,720,000 (YEN)

• Grant-in-Aid for Scientific Research(C)

  Project Year: 2019.04  -  2023.03 

  Direct: 3,400,000 (YEN)  Overheads: 4,420,000 (YEN)  Total: 1,020,000 (YEN)

• Imaging analysis on cell geometry during mechanical optimization in leaves

  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

  Project Year: 2018.06  -  2023.03 

  Direct: 44,200,000 (YEN)  Overheads: 57,460,000 (YEN)  Total: 13,260,000 (YEN)

• Development of on-chip vascular model utilizing the self-organizing ability: reconstitution-based understanding of vascular physiology and pathology

  Grant-in-Aid for challenging Exploratory Research

  Project Year: 2014.04  -  2016.03 

  Investigator(s): Nishiyama Koichi, MIURA Takashi, YOKOKAWA Ryuji, MATSUBARA Akira, KUNITA Itsuki 

  Direct: 2,800,000 (YEN)  Overheads: 3,640,000 (YEN)  Total: 840,000 (YEN)

  　View Summary

  In this study, we developed a fundamental technology, which enables to reconstiute the long-term-perfusable vascualr network on a microfluidic device via angiogenesis. Using either human or murine primary cells, we succeeded to reconstruct the vascualr strucutre that approsimates in vivo, in which endothelial sprouts were properly covered with perivascular pericytes and have a lumen structure. Furthermore, the reconstructed vasculature was perfusable with the culture media at a perfusion speed, corresponding to capillary blood flow, over a week. In addition, we established an imaging and quatitative analysis system for understanding of cellular angiogenic mechanisms. Using the on-chip angiogenic model, we identified intraluinal pressure to be one of the potential negative regulators of endothelial cell-driven aniogenesis.

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SDGs 【 display / non-display 】

SDGs 【 display / non-display 】