Neophobia in 10 ungulate species-a comparative approach

Area of Science:

• Animal behavior and cognition
• Comparative psychology
• Ecology

Background:

• Neophobia, the fear of novel stimuli, significantly impacts individual fitness but the factors influencing its variation remain unclear.
• Understanding neophobia is crucial for conservation efforts and managing captive animal populations.
• Ungulates offer a diverse model system to investigate inter-specific variations in behavior due to their varied socio-ecological traits.

Purpose of the Study:

• To investigate the predictors of neophobia variation in ungulates.
• To determine if individual characteristics (rank, social integration, sex) and species-level traits (dietary breadth, group size, domestication) influence neophobia.
• To explore the relationship between social structure and neophobia across different ungulate species.

Main Methods:

• Behavioral observations and experimental tests were conducted on 78 captive ungulates from 10 species.
• Individuals were presented with familiar food near a novel object to measure latency to approach and eat, and time spent near the food.
• Phylogenetic approaches and social network analyses were employed to analyze the data.

Main Results:

• Neophobia was higher in socially integrated individuals across ungulate species.
• Individual rank and sex did not significantly predict neophobia levels.
• Barbary sheep exhibited lower neophobia compared to other species, correlating with their larger group sizes.

Conclusions:

• Social integration is a key factor predicting higher neophobia in ungulates.
• Larger group sizes are associated with reduced neophobia, supporting the hypothesis that social structure modulates fear responses to novelty.
• Ungulates provide a valuable model for comparative studies on animal behavior and cognition.