The research group of Professor Nakayachi University, Researcher Kimimoto Yasugi, Associate Professor Eiji Watanabe, and Professor Souma Shiraishi and Professor Seiichi Uchida of the National Institute for Basic Biology announced on April 4th, 12D Computer Graphics (3D Computer Graphics). 3DCG) Incorporating virtual reality technology such as animation, we created a "virtual medaka" that is almost indistinguishable from the real thing, and clarified that medaka uses various information to select a group of opponents.
In general, groups and populations of saltwater fish such as tuna and bonito to freshwater fish such as medaka are composed of the same species, but it was not known how to determine the same species or different species.Previous studies have reported that morphological information such as color, size, and shape play an important role in selecting a group of people.However, in previous studies, it was technically difficult to systematically and strictly manipulate motor information in addition to morphological information, and there was no study that verified how much information contributed to the induction of herd behavior. ..
This time, the research group created a three-dimensional model of medaka that closely resembles the real thing based on medaka photographs taken from multiple angles, quantified the movement of medaka that freely moves from video images, and based on that, the movement of medaka. Was reproduced on the display to create a very realistic 3DCG animation of medaka.
By using this, it is clear that medaka selects a group of opponents by making full use of various information such as color, shape, movement trajectory (overall movement), body axis movement (local movement such as tail fin). I made it.By developing a virtual medaka that can simultaneously control and operate motion information such as movement locus and body axis motion in addition to morphological information such as color and shape, research that was not possible in the past will become possible, and how animals will be. It is expected that it will lead to the elucidation of the herd formation and visual cognitive mechanism of animals, such as whether they judge the same species or different species.
