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Social security: individuals in socially reciprocal groups may perceive security from predators
Conner S Philson1,2,3, Clara Klassen1, Kenta Uchida4
1Rocky Mountain Biological Laboratory, P.O. Box 519, Crested Butte, CO 81224, United States.
Summary
Social group structure influences antipredator behavior in yellow-bellied marmots. Tightly connected marmot groups showed reduced vigilance, suggesting social connections enhance perceived security.
Area of Science:
- Behavioral Ecology
- Animal Social Behavior
- Predator-Prey Interactions
Background:
- Group size is a primary factor influencing antipredator behavior, with larger groups often reducing individual vigilance.
- Social connections and group social structure, beyond mere group size, can also impact an individual's perceived risk of predation.
- Understanding these social dynamics is crucial for a comprehensive view of antipredator strategies.
Purpose of the Study:
- To investigate the relationship between social structure and antipredator behavior in yellow-bellied marmots (Marmota flaviventer).
- To determine if social reciprocity and group connectivity influence vigilance and flight initiation distance (FID).
- To compare the effects of social structure versus immediate environmental factors on antipredator responses.
Main Methods:
- Quantified antipredator behavior using time allocated to vigilance during foraging and flight initiation distance (FID).
- Employed linear mixed effect models to analyze the influence of social structure metrics on these behaviors.
- Assessed the impact of immediate environmental factors, such as proximity to conspecifics and burrows.
Main Results:
- Found modest support for the Social Security Hypothesis: individuals in more socially reciprocal groups exhibited reduced vigilance.
- No significant effect of group social structure was found on flight initiation distance (FID).
- Immediate environmental factors (e.g., number of individuals nearby, distance to burrow) had a substantially larger effect on antipredator behavior than social structure.
Conclusions:
- Social structure, particularly social reciprocity, plays a role in modulating vigilance behavior in yellow-bellied marmots.
- The immediate environment is a more dominant factor influencing antipredator responses (vigilance and FID) than group social structure.
- Future research should consider both social dynamics and environmental context for a complete understanding of antipredator behavior.
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