Extracting Cardiac Activity for Arthropods Using Digital Cameras: Insights From a Pilot Study

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.