Mechanism of behavioral individuality and its adaptive significance

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   Behavioral individuality is believed to contribute to the emergence of social organization. For example, bold individuals are likely to lead in a group, while timid ones are likely to follow. The purpose of this project is to clarify how genetic polymorphisms generate behavioral individuality and examine if the individuality could contribute to the emergence of the division of labors in animal groups.

Future plan

   Germany groups (Heidelberg University and Karlsruhe Institute of Technology) established over 100 inbred strains derived from a wild medaka population from Kiyosu in Southern Japan. This enables us to test if genetic variation within the same population can generate division of labor. Japan group (Okayama University) will perform behavioral tests and compare behavioral properties among inbred strains. We are planning to identify genetic polymorphisms related to the individuality. In addition, we will examine if the division of labor could emerge based on different behavioral properties in a mixed group.

Establish of inbred panel derived from a single wild population (Heidelberg University and Karlsruhe Institute of Technology) Reference: G3 (2014) 4: 433–445.
Behavioral test using a mixed group of some fish strains with different behavioral properties (Okayama University)