Detecting and Tracking the Positions of Wild Ungulates Using Sound Recordings

Area of Science:

• Wildlife Ecology
• Bioacoustics
• Animal Tracking Technology

Background:

• Wild ungulate populations are increasing globally, leading to significant ecosystem damage.
• Accurate population and habitat estimation are crucial for effective wildlife management.
• Traditional monitoring methods like light census surveys are inaccurate and labor-intensive, especially in challenging terrains.

Purpose of the Study:

• To introduce a new technique for detecting and tracking wild deer positions using sound recordings.
• To address limitations of existing wildlife monitoring methods, including those using unmanned aerial vehicles and passive acoustic monitoring.
• To develop a system capable of overcoming time-drift issues in recorders for precise positioning.

Main Methods:

• A novel acoustic technique utilizing the time lag between three sound recorders to estimate deer positions.
• Development of a sound recording system synchronized with GPS satellite time information to prevent internal clock drift.
• Validation of the technique in both experimental and natural environments, including Oze National Park.

Main Results:

• The proposed technique demonstrated reasonable accuracy in determining deer positions in various environments.
• The system successfully identified and tracked deer calls, enabling the elimination of repetitive sounds from the same individual.
• Over a two-hour period in Oze National Park, the technique showed great potential for tracking deer movement.

Conclusions:

• This acoustic positioning technique offers a promising tool for tracking deer movement and potentially estimating population sizes.
• It represents a significant advancement towards automated wildlife monitoring systems for vocal species.
• The method overcomes key limitations of current wildlife monitoring techniques, particularly in difficult-to-access areas.