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Summary

•This study introduces a noninvasive video-based system to monitor cardiac activity in insects by analyzing subtle body movements.

•The method accurately captures heart signals without restraining the subjects, aligning closely with traditional invasive techniques.

•This approach offers a cost-effective and ethical tool for long-term ecological and physiological research.

Arthropods are vital to ecosystems and are among the most diverse and abundant living creatures on Earth. Understanding their physiological processes, such as cardiac activity, is essential for studying their health, behavior, and responses to environmental changes.

Traditional methods of monitoring cardiac signals often rely on invasive or contact techniques that require immobilization, which limits applicability of the methods in long-term studies and disrupts the insect's natural behavior.

This study proposes a noninvasive, video system to extract cardiac signals from insects by analyzing subtle body movements.

The results closely align with reference data obtained from established methods, validating the system's accuracy and feasibility.

The study provides a foundation for developing cost-effective, noninvasive tools that preserve insects’ natural behavior welfare while offering new opportunities for ecological and physiological research.