Current Affiliation Organization 【 display / non-display 】

Current Affiliation Organization 【 display / non-display 】

External Career 【 display / non-display 】

External Career 【 display / non-display 】

Affiliated academic organizations 【 display / non-display 】

Affiliated academic organizations 【 display / non-display 】

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Research Areas 【 display / non-display 】

Research Areas 【 display / non-display 】

Research Theme 【 display / non-display 】

Research Theme 【 display / non-display 】

• Aquaculture of Cephalopods

• Sociality and Communication of Cephalopods

• Natural History of Cephalopods

Published Papers 【 display / non-display 】

Published Papers 【 display / non-display 】

• Allometry for Eyes and Optic Lobes in Oval Squid (Sepioteuthis lessoniana) with Special Reference to Their Ontogenetic Asymmetry

  Yuma Sakurai, Yuzuru Ikeda

  Symmetry ( MDPI AG )  14 ( 4 ) 644 - 644   2022.03 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

  　View Summary

  Eyes develop in relation to body size and brain area for visual processing in some vertebrates. Meanwhile, it is well known that many animals exhibit left–right asymmetry in both morphology and behavior, namely, lateralization. However, it remains unclear whether the eyes and visual processing brain areas synchronously develop for their asymmetry. Oval squid (Sepioteuthis lessoniana) exhibits lateralization of optic lobe volume and left or right eye usage toward specific targets during their ontogeny. We address the question of how left–right asymmetry of the eyes and optic lobes exhibit an allometric pattern. To examine this question, we estimated the left and right volumes of eyes and optic lobes using microcomputed tomography. We found that, for the optic lobe volume, the right enlargement that appeared at ages 45 and 80 days then shifted to the left at age 120 days. In contrast, the volume of eyes did not show any left–right asymmetries from hatching to age 120 days. We also found that the volume of the eyes and optic lobes showed a slower increase than that of the whole-body size. Within these two visually related organs, the eyes grew faster than the optic lobes until age 120 days. These results are discussed in the context of the survival strategy of oval squid that form schools, two months post-hatching.

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• Visual and brain lateralization during the posthatching phase in squid under solitary and group conditions

  Yuma Sakurai, Yuzuru Ikeda

  Animal Behaviour ( Elsevier BV )  183   13 - 28   2022.01 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Evaluation of Visual and Tactile Perception by Plain-Body Octopus (<i>Callistoctopus aspilosomatis</i>) of Prey-Like Objects.

  Kawashima S, Ikeda Y

  Zoological science ( Zoological Science )  38 ( 6 ) 495 - 505   2021.12 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Morphology of the suckers for hunting behavior in broadclub cuttlefish (Sepia latimanus)

  Omura A.

  Ecological Research ( Ecological Research )  37 ( 1 ) 156 - 162   2021.11 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Plain-body octopus's (Callistoctopus aspilosomatis) learning about objects via both visual and tactile sensory inputs: A pilot study.

  Sumire Kawashima, Haruhiko Yasumuro, Yuzuru Ikeda

  Zoological Science   38 ( 5 ) 383 - 396   2021.07 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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Books 【 display / non-display 】

Books 【 display / non-display 】

• Color Change in Cephalopods. In (H. Hashimoto, M. Goda, R. Futahashi, R. Kelsh, T. Akiyama, eds.) Pigments, Pigment Cells and Pigment Patterns

  Yuzuru Ikeda ( Part: Joint Editing and Writing )

  Springer  2021.07

Other Papers 【 display / non-display 】

Other Papers 【 display / non-display 】

• How squid build their graded-index spherical lenses

    34 ( 3 ) 42 - 45   2019.03

   

• Universal "emotional expression" across species: thinking from human, dog, rat, octopus and squid

  Nakashima Satoshi, Takano Yuji, Ikeda Yuzuru, Komori Masashi, Takaoka Akiko, Hiraishi Kai

  The Proceedings of the Annual Convention of the Japanese Psychological Association ( The Japanese Psychological Association )  81 ( 0 ) SS - 046-SS-046   2017

   

  DOI

• アオリイカにおける群れ気質と構成員の遺伝的組成との関係.

  杉本親要, 井上-村山美穂, 池田 譲

  日本水産学会2016年3月26-30日,東京海洋大学品川キャンパス(東京都港区)     2016

   

• 頭足類の社会性に関する研究―12)アオリイカの群れにみる集団力学

  江崎貴之介, 青徹, 安室春彦, 杉本親要, 池田譲

  日本水産学会大会講演要旨集   2015   33   2015.03

   

  J-GLOBAL

• 頭足類の社会性に関する研究―14)アオリイカのソーシャルネットワークと群れ構成員の遺伝的組成

  杉本親要, 井上(村山)美穂, 池田譲

  日本水産学会大会講演要旨集   2015   33   2015.03

   

  J-GLOBAL

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Presentations 【 display / non-display 】

Presentations 【 display / non-display 】

• 知の旧家に住まう者たち:イカ・タコの行動から

  池田 譲

  NICTオープンサミット in 沖縄 -量子情報、生命システムが創る情報通信技術-  2018  -  2018 

• 頭足類における表情もしくは代替的なシグルナルによる社会的相互作用研究

  池田 譲

  日本心理学会シンポジウム生物種を越えてユニバーサルな「表情」：ヒト、犬、ラット、タコ・イカから考える  2017.09  -  2017.09 

• イカ・タコの心を探る

  池田 譲

  にいがた市民大学講座 人間と動物のつながり–動物が私たちに教えてくれること–  2017.06  -  2017.06 

• 知を武具に生きるものたち–イカとタコにみる心と社会–

  池田 譲

  新潟大学人文社会・教育科学系附置間主観的感性論研究センター主催公開講演会  2017.06  -  2017.06 

• What’s the cephalopod megalobrain for?

  池田 譲

  International Symposium on Evolution of Brain, Cognition, and Emotion  2017  -  2017 

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Academic Awards 【 display / non-display 】

Academic Awards 【 display / non-display 】

• Zoological Science Award and Fujii Award

  2022.09     Evaluation of Visual and Tactile Perception by Plain-body Octopus (Callistoctopus aspilosomatis) of Prey-like Objects

  Winner: Kawashima, S., Ikeda, Y.

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

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

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

  Project Year: 2021.04  -  2025.03 

  Direct: 13,200,000 (YEN)  Overheads: 17,160,000 (YEN)  Total: 3,960,000 (YEN)

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

  Project Year: 2021.04  -  2024.03 

• Challenging research (sprout)

  Project Year: 2019.06  -  2021.03 

  Direct: 5,000,000 (YEN)  Overheads: 6,500,000 (YEN)  Total: 1,500,000 (YEN)

• Challenging research (sprout)

  Project Year: 2019.06  -  2021.03 

  Direct: 5,000,000 (YEN)  Overheads: 6,500,000 (YEN)  Total: 1,500,000 (YEN)

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

  Project Year: 2017.04  -  2020.03 

  Direct: 3,700,000 (YEN)  Overheads: 1,110,000 (YEN)  Total: 4,810,000 (YEN)

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Social Activity 【 display / non-display 】

Social Activity 【 display / non-display 】

• 2022.10

  　

  　

• 2022.08

  　

  　

• 2021.11

  　

  　

• 2021.11

  　

  　

• 2021.11

  　

  　

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Media Coverage 【 display / non-display 】

Media Coverage 【 display / non-display 】

• タコは…宇宙から来た!?  TV or radio program

  フジテレビ  世界の何だコレ!?ミステリー 2時間SP  2024.4

  Author： Myself 

  　View Summary

  ゲスト出演し、タコの宇宙起源説について解説した。

• 南の楽園 石垣島のショアエギング 価値ある一杯を求めて  TV or radio program

  BS-TBS  釣り百景  2024.3

  Author： Myself 

  　View Summary

  アオリイカについて解説した。

• おいしいだけじゃない！神秘の知的生命体「タコ」  TV or radio program

  NHK Eテレ  サイエンスZERO  2023.12

  Author： Myself 

  　View Summary

  おいしいだけじゃない！神秘の知的生命体「タコ」にゲスト出演し、タコについて解説した。

• マダコ  TV or radio program

  BS釣りビジョン  熱愛！サカナ図鑑  2023.9

  Author： Myself 

  　View Summary

  ゲスト出演し、マダコについて語った。

• タコについて  TV or radio program

  TOKYO FM /JFM38局  レコレール  2023.8

  Author： Myself 

  　View Summary

  ゲスト出演し、タコについて語った。

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