Leadership amongst pigs when faced with a novel situation.

Area of Science:

• Animal Behavior
• Ethology
• Animal Social Dynamics

Background:

• Leadership is a crucial behavior impacting group dynamics and survival.
• While leadership has been studied in various contexts, individual characteristics predisposing animals to leadership, especially in domestic species, remain underexplored.
• Understanding leadership in domestic animals like pigs can offer insights into social structures and potentially improve animal welfare and management.

Purpose of the Study:

• To investigate leadership emergence and repeatability in groups of young pigs (Sus scrofa domesticus).
• To identify individual characteristics, such as sex, body weight (dominance proxy), and coping style, associated with leadership roles.
• To compare leadership patterns in domestic pigs with those observed in wild populations.

Main Methods:

• Leadership was assessed in 32 groups of pigs (n=366) using a group-based Human Approach Test, repeated three times.
• The first pig to approach the human in each group was identified as the leader.
• Leadership repeatability and the influence of sex, body weight, and coping style were statistically analyzed.

Main Results:

• Leadership was marginally repeatable across the tests, with only 6 out of 26 groups showing a consistent leader.
• Female pigs were significantly more likely (4.13 times odds) to emerge as leaders compared to males.
• No significant effect of body weight or coping style on leadership was found.

Conclusions:

• In domestic pigs, sex is a significant predictor of leadership, with females more prone to taking the lead.
• These findings align with observations in some wild populations where females often lead despite males being larger.
• Further research into the nuances of animal leadership can inform management practices and our understanding of social evolution.