伊澤 栄一 (イザワ エイイチ)

Izawa, Eiichi

写真a

所属(所属キャンパス)

文学部 人文社会学科(人間関係系) (三田)

職名

教授

HP

経歴 【 表示 / 非表示

  • 2002年04月
    -
    2004年03月

    日本学術振興会特別研究員(DC2,名古屋大学大学院生命農学研究科)

  • 2004年04月
    -
    2005年12月

    日本学術振興会特別研究員(PD,慶應義塾大学社会学研究科)

  • 2006年01月
    -
    2008年03月

    慶應義塾大学文学研究科 准教授(有期)(魅力ある大学院教育イニシアティブ)

  • 2008年04月
    -
    2012年03月

    慶應義塾大学社会学研究科 准教授(有期)(人文グローバルCOE”論理と感性に関する先端的教育研究拠点”)

  • 2012年04月
    -
    2013年03月

    慶應義塾大学 論理と感性のグローバル研究センター, 共同研究員

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学歴 【 表示 / 非表示

  • 1999年03月

    名古屋大学, 理学部, 物理学科

    大学, 卒業

  • 2003年03月

    名古屋大学, 生命農学研究科, 生物機構・機能科学専攻

    大学院, 修了, 博士

学位 【 表示 / 非表示

  • 博士(農学), 名古屋大学, 課程, 2003年03月

 

研究分野 【 表示 / 非表示

  • 実験心理学 (動物心理学)

  • 神経行動学

 

著書 【 表示 / 非表示

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論文 【 表示 / 非表示

  • Different patterns of allopreening in the same-sex and opposite-sex interactions of juvenile large-billed crows (Corvus macrorhynchos)

    Miyazawa E., Seguchi A., Takahashi N., Motai A., Izawa E.I.

    Ethology (Ethology)  126 ( 2 ) 195 - 206 2020年02月

    研究論文(学術雑誌), 共著, 査読有り,  ISSN  01791613

     概要を見る

    © 2019 Blackwell Verlag GmbH Allogrooming, where an individual grooms another, has been extensively studied in various social animals to understand its role in the evolution of cooperation/prosociality. In existing studies in mammals, allogrooming has been suggested to exhibit not only a hygiene but also a social function. Allopreening, a topic of increasing interest in mammals but recently also in birds, has been studied mostly with mature animals. However, in some species immature individuals also show allopreening and its function remains poorly understood. Crows, Corvus spp., are an ideal model to study this phenomenon, because juveniles form year-round aggregates during their long juvenile stage (e.g., throughout 3–4 years). Here, we investigated the function of allopreening in juvenile groups of wild-caught large-billed crows (C. macrorhynchos). Allopreening frequency and duration for three groups of wild-caught juveniles were analysed to determine whether there was a symmetrical (i.e., reciprocal) or asymmetrical allopreening pattern, and if sex composition of the dyad and/or relative dominance of donor and recipient had an effect. We found that both the frequency and duration of male allopreening correlated with frequency of aggression. Allopreening between both males and females occurred unidirectionally from dominants to subordinates but not in the opposite direction. On the contrary, allopreening between a male and a female was found to be reciprocated, though the absolute frequency and duration were both greater in males than in females. These results suggest that the social function of allopreening in juvenile crows differs depending on the sex composition of the dyad, functioning as a dominance signal for same-sex dyads, and serving a social bonding function for opposite-sex dyads. These findings may reflect the potentially crucial roles of allopreening in within-sex competition and opposite-sex attraction during the 3 year-long juvenile stage affecting future mate choice in lifelong monogamy.

  • Rapid adjustment of pecking trajectory to prism-induced visual shifts in crows as compared with pigeons

    Matsui H., Izawa E.

    Journal of Experimental Biology (Journal of Experimental Biology)  222 ( 4 ) jeb182345 2019年

    研究論文(学術雑誌), 共著, 査読有り,  ISSN  00220949

     概要を見る

    © 2019. Published by The Company of Biologists Ltd Pecking in birds is analogous to reaching and grasping movements in primates. Earlier studies on visuomotor control in birds, which were conducted mostly in pigeons, suggested that avian pecking is controlled feedforwardly, and is out of the control of visual guidance during movement. However, recent studies using crows suggested a role of vision in pecking control during movement. To unveil what visuomotor mechanisms underlie the flexibility of pecking in crows, we examined whether pigeons and crows adjust their pecking to the visual distortion induced by prisms. Because prisms induce visual shifts of object positions, birds were required to adjust their movements. Pecking kinematics were examined before and after attaching prisms in front of the birds' eyes. Analysis of lateral deviation caused by the prisms showed that crows rapidly adjusted their pecking trajectories, but pigeons did so slowly. Angular displacement also increased in pigeons after attachment of the prism, but decreased in crows. These responses to prisms were consistent among individuals in pigeons but varied in crows, though the adjustment of pecking commonly succeeded in crows. These results suggest that pecking in pigeons predominantly involves feedforward control and that the movement is determined depending on the visual information available before the initiation of pecking. In contrast, the results from crows suggest that their pecking trajectories are corrected during the movement, supporting on-line visual control. Our findings provide the first evidence to suggest the on-line visual control of pecking in birds.

  • Control of bill-grasping aperture with varying food size in crows

    Matsui H., Izawa E.

    NeuroReport (NeuroReport)  30 ( 7 ) 522 - 525 2019年

    研究論文(学術雑誌), 共著, 査読有り,  ISSN  09594965

     概要を見る

    © 2019 Wolters Kluwer Health, Inc. All rights reserved. Grasping movement in primates is known to be a visually guided behavior and the aperture of hand opening is adjusted to the target size on the basis of visual information. The analogous behavior can be found in birds, called 'pecking', consisting of head-reaching and bill-grasping. Bill-grasping has been investigated mainly in pigeons and an aperture adjustment as seen in primates has been reported. This study focused on kinematics of pecking in crows, known to possess dexterous visuomotor skills, to examine whether crows adjust the grasping aperture to food diameter with a kinematic mechanism similar to that in pigeons. The pecking at a small piece of food was video recorded to analyze the grasping aperture. The results showed that the grasping aperture was proportional to food diameter. Kinematic analysis showed that the aperture adjustment was mediated by grasping velocity and grasping duration, which is consistent with the findings of previous research on pecking in pigeons. However, the relative contribution of grasping velocity was much higher than that of grasping duration. Our findings suggest the different sensorimotor mechanisms to control bill-grasping between the avian species with different foraging ecology.

  • Avian brains: insights from development, behaviors and evolution

    NOMURA Tadashi, IZAWA Ei-Ichi

    Development Growth and Differentiation 59   244 - 257 2017年06月

    研究論文(学術雑誌), 共著, 査読有り

  • Flexible motor adjustment of pecking with an artificially extended bill in crows but not in pigeons

    MATSUI Hiroshi, IZAWA Ei-Ichi

    Royal Society Open Science 4   160796 2017年

    研究論文(学術雑誌), 共著, 査読有り

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KOARA(リポジトリ)収録論文等 【 表示 / 非表示

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総説・解説等 【 表示 / 非表示

  • Understand the evolution of animal behaviour at the different levels: brain/body anatomy and physiology, and behavioural functions

    Ei-Ichi IZAWA

    Science IMPACT (Science Impact Ltd.)  12   70 - 72 2018年

    総説・解説(商業誌、新聞、ウェブメディア), 単著

  • カラスから探る社会認知機能の進化 -知性に大脳“皮質”は必要か?-

    伊澤栄一

    科学 (岩波書店)  79   678 - 681 2009年

    総説・解説(商業誌、新聞、ウェブメディア), 単著

  • カラスの脳と行動から探る知性の進化

    伊澤栄一

    脳21 (金芳堂)  10   355 - 359 2007年

    総説・解説(商業誌、新聞、ウェブメディア), 単著

競争的資金等の研究課題 【 表示 / 非表示

  • 身体拡張性の比較心理学

    2019年06月
    -
    2021年03月

    文部科学省・日本学術振興会, 科学研究費助成事業, 伊澤 栄一, 挑戦的研究(萌芽), 補助金,  代表

  • 情動をうみだす脳と身体の協働システムの比較認知神経科学研究

    2017年04月
    -
    2020年03月

    文部科学省・日本学術振興会, 科学研究費助成事業, 伊澤 栄一, 基盤研究(B), 補助金,  代表

  • 鳥の道具使用における視覚機能の解明に向けた眼球運動の非侵襲計測法の開発

    2016年04月
    -
    2018年03月

    文部科学省・日本学術振興会, 科学研究費助成事業, 伊澤 栄一, 挑戦的萌芽研究, 補助金,  代表

 

担当授業科目 【 表示 / 非表示

  • 比較心理学特殊研究Ⅰ

    2020年度

  • 生物心理学演習Ⅱ

    2020年度

  • 心理学実験Ⅱ

    2020年度

  • 心理学実験Ⅰ

    2020年度

  • 心理学研究会Ⅳ

    2020年度

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所属学協会 【 表示 / 非表示

  • 日本動物心理学会

     
  • 日本動物行動学会

     
  • 日本鳥学会

     
  • 日本動物学会

     
  • 日本比較生理生化学会

     

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委員歴 【 表示 / 非表示

  • 2014年07月
    -
    継続中

    理事, 日本動物心理学会

  • 2016年04月
    -
    継続中

    科学技術予測センター専門調査員, 文部科学省