Temperature Dependency of Insect's Wingbeat Frequencies: An Empirical Approach to Temperature Correction.

Area of Science:

• Ecology
• Biophysics
• Entomology

Background:

• Ambient temperature significantly influences insect physiology and behavior.
• Understanding insect flight dynamics is key for ecological monitoring and pest control.
• Previous studies have noted temperature effects on insect activity, but a comprehensive analysis of wingbeat frequency is lacking.

Purpose of the Study:

• To investigate the relationship between ambient temperature and insect wingbeat frequency.
• To develop a general model for temperature correction of wingbeat frequency data.
• To improve the accuracy of insect classification using optical and acoustic sensing technologies.

Main Methods:

• Collected over 302,000 insect observations using a near-infrared optical sensor over eight months.
• Measured insect wingbeat frequency, wing and body optical cross-sections, and ambient temperature.
• Utilized clustering analysis to group insects and analyze wingbeat frequency trends across a temperature range of 10 °C to 38 °C.

Main Results:

• A positive correlation was found between ambient temperature and insect wingbeat frequency.
• Wingbeat frequency increased more significantly at higher frequencies.
• Average frequency increase ranged from 2.02 Hz/°C at 50 Hz to 9.63 Hz/°C at 525 Hz.

Conclusions:

• A general model was proposed to correct wingbeat frequencies based on temperature.
• This model can enhance the accuracy of insect clustering by optical and acoustic sensors.
• The study provides general insights into insect flight behavior dynamics related to environmental temperature, applicable across multiple species.