東京大学社会心理学研究室では、2ヶ月に1回程度のペースで「新・社会心理学コロキウム」を開催しています。 一人の話者にＱ＆Ａを含めて1時間半お話しいただき、参加者との活発な議論を楽しむ集まりです。 事前の登録などは一切不要で、自由にご参加いただけます。 平成30年度の第2回目は、9月10日（月）午後4時から開催します。 どうぞ奮ってご参加ください。
◆日 時： 9月10日（月）16:00 ～ 17:30
◆場 所： 東京大学本郷キャンパス 法文2号館 教員談話室
◆講 師： Dr. Guy Theraulaz (CNRS [フランス国立科学研究センター] )
◆演 題： Deciphering individuals' interactions involved in the coordination of three-dimensional nest construction in ant colonies
◆概 要： The amazing ability of social insects to solve everyday-life problems, also known as «swarm intelligence» has received a considerable attention the past twenty years. One of the most famous feats of insect societies is their ability to build impressive nest architectures. Not only their characteristic scale is typically much larger than the size of individual insects but some of these nests can also be highly complex. The evolution of construction techniques used by ants, wasps, bees and termites has provided a whole set of innovations in terms of architectural designs that proved to be efficient to solve problems as various as controlling nest temperature, ensuring gas exchanges with the outside environment or adapting nest architecture to growing colony size. How these efficient designs emerge from the combination of millions of local building actions performed by individual workers? And how do insects coordinate their building actions? To investigate these issues, we focused on the early stages of nest construction in the garden ant Lasius niger. This experimental paradigm was used to disentangle the coordinating mechanisms at work and characterize individual behaviors (transport and assemblage of construction material) and the stigmergic interactions involved in the coordination of building actions. We then developed a 3D model implementing the behavioral mechanisms detected on the individual level and showed that they correctly explain the construction dynamics and the spatial patterns observed at the collective level for various conditions. Our model shows that the evaporation rate of a building pheromone is a highly influential parameter on the phenotypic plasticity of nest architectures. The model also reveals that complex structures such as helicoidal ramps connecting nearby chambers emerge from a constant remodeling process of the nest architecture. Through this particular example we will illustrate the methods we routinely used to understand collective intelligence phenomena in animal and human groups.
◆お問い合わせ先： 東京大学大学院人文社会系研究科 社会心理学研究室
E-mail: sphisho [at] L.u-tokyo.ac.jp