Behavioral mimicry of eating in mice

Nonconscious behavioral mimicry is prevalent in humans and highly social animals who imitate the behaviors of others without awareness. Previous studies indicated people tended to match their amount of eating to that of their eating companions due to behavioral mimicry, however whether such phenomena were existed in rodents is still unknown. Developing a behavioral paradigm would be helpful to better understand the molecular and circuit mechanisms underlying behavioral mimicry. In this study, we examined behavioral mimicry of eating in C57BL/6J mice which had strong sociality and were widely used as animal model in researches. We set up an eating monitoring platform, and this platform could record the data of mice eating behavior in real time. We further examined the behavioral mimicry of eating in mice, and found that the mice observing eating behavior of food-restricted mice would consume more food than control mice, and visual cue with eating behavior was sufficient to increased food consumption in mice. Our study indicated behavioral mimicry of eating was existed in mice and provided a mouse model for future studies on the mechanism of behavioral mimicry of eating.