Reshaping Human-animal Relationships: Exploring Lemur and Human Enrichment through Smell, Sound, and Sight

Research Background and Issues

• What problems or challenges did the authors identify?

  • Modern zoos face the challenge of balancing public education with ensuring animal welfare. While direct interactions between visitors and animals can be engaging, they may negatively impact animal welfare through behaviors such as noise, feeding, and touching.
  • Current zoo technologies primarily separate the use of animals and visitors, lacking integrated designs that simultaneously address both animal welfare and visitor education needs.
  • The sensory preferences and behavioral patterns of the red ruffed lemur (Varecia rubra), an endangered species, remain under-researched.

• Why is this issue important?

  • Zoos are critical hubs for the conservation of endangered species and serve as venues for public ecological and conservation education. Optimizing human-animal relationships through technology could enhance visitor empathy and improve animal quality of life.
  • A lack of comprehensive understanding of the potential of multisensory technologies in zoo education and welfare limits their effective application.

• Research Motivation and Related Work

  • Previous studies have highlighted the potential of digital technologies to enhance primate cognition and stimulate natural behaviors, but most have focused on single-sensory stimuli.
  • In visitor education, the effectiveness of technology in enhancing exhibits and experiences has been validated in fields such as museums, but its application in zoos remains relatively underexplored.
  • This study aims to address the knowledge gap in designing technologies that simultaneously cater to animals and visitors, exploring the impact of multisensory stimuli on both.

Solution

• What methods or solutions did the authors propose?

  • Developed a multimodal device named SensorySafari, which allows red ruffed lemurs to autonomously trigger olfactory, auditory, and visual stimuli, while designing a similar interactive device for visitors.
  • The visitor device is based on an educational game that guides visitors to guess the sensory preferences of lemurs and personally experience the stimuli chosen by the lemurs.

• What is innovative about this solution?

  • Designed parallel technologies for both animals and visitors, enabling simultaneous interaction through similar devices, fostering cross-species perception and understanding.
  • Conducted the first systematic study of red ruffed lemurs' preferences for multimodal sensory stimuli, addressing a gap in research on animals' multisensory experiences.
  • Combined behavioral observation data with direct technological interaction to quantify visitor education, empathy, and experiential outcomes.

• What are the implementation steps and key technologies used?

  • Phase 1: Study on Lemurs:
    • Deployed the multimodal device in the lemurs' habitat, recording their interactions with single and combined modes of olfactory, visual, and auditory stimuli.
    • Collected interaction data using an infrared-triggered system and cameras to evaluate the attractiveness of different stimuli types to the lemurs.
  • Phase 2: Visitor Interaction:
    • Deployed a visitor device and observed visitor behavior across four stages (no technology, lemur device only, visitor device only, both devices combined).
    • Recorded visitor dwell time, numbers, educational outcomes, empathy scores, and overall experience through questionnaires and observations.
  • Used a Raspberry Pi control system to enable remote monitoring and data recording for the devices.

Research Outcomes

• What specific results were achieved?

  • Red ruffed lemurs' interaction time with multimodal combined stimuli was significantly higher than with single-mode stimuli, with olfactory stimuli being the most attractive and visual stimuli the least.
  • Simultaneous deployment of lemur and visitor devices significantly increased visitor numbers, dwell time, educational outcomes, empathy scores, and overall experience.
  • Even when visitors did not directly interact with or observe lemurs using the device, the mere presence of the device enhanced visitor education and experience.

• What advantages does it have compared to existing solutions?

  • Current technologies are mostly designed for either animals or visitors, whereas this study is the first to demonstrate that technology can simultaneously meet the needs of both animal welfare and visitor education.
  • Proposed a novel methodology that effectively integrates animal behavior research with visitor perception through technological devices.
  • The experiment revealed the potential of technology to enhance visitors' understanding of animal intelligence and behavior.

• What were the experimental or evaluation results?

  • Over 63 days of experimentation, lemurs triggered the device 4,021 times, demonstrating the significant appeal of the technological device, particularly for olfactory and multimodal stimuli.
  • During the second phase involving 25,782 visitors, the average visitor dwell time during the "lemur and visitor dual-device" stage significantly increased (from 70 seconds to 1,094 seconds).
  • Questionnaire data (968 responses) showed that empathy scores peaked during the dual-device stage, with 83% of visitors reporting increased empathy.

• Limitations and Future Directions

  • Limitations:
    • The study was limited to the endangered red ruffed lemur, and the generalizability of the results needs further testing with other animals and environments.
    • Sensory dimensions such as tactile and gustatory stimuli were not explored.
    • Some visitors were unable to fully experience the lemur device due to sensory barriers (e.g., sound blocked by glass enclosures).
  • Future Directions:
    • Extend the technology to other species to verify cross-species applicability, particularly for less visitor-attractive animals such as reptiles or insects.
    • Investigate the potential long-term impacts of such devices on animal behavior patterns and welfare, including possible habituation effects.
    • Optimize technology design to enhance real-time interactions between animals and visitors, such as developing augmented reality or synchronized devices.
    • Incorporate broader sensory dimensions (e.g., tactile) and accommodate visitors of different ages and cognitive abilities to improve system inclusivity.

Conclusion

This study successfully developed the SensorySafari technology, which simultaneously addresses the needs of both animals and visitors, significantly enhancing the behavioral enrichment of red ruffed lemurs and the educational experience of visitors. It sets an effective example for cross-species technology design. Future work will further explore its application potential across more animal species and through smarter technological interactions.