Resting networks and personality predict attack speed in social spiders

Area of Science:

• Behavioral ecology
• Social network analysis
• Collective behavior in animals

Background:

• Social predators often hunt cooperatively, with interaction patterns influencing response times to prey.
• Understanding social dynamics is crucial for predicting collective predation success.

Purpose of the Study:

• To investigate how social interaction patterns at different organizational levels affect collective predation speed in the social spider Stegodyphus dumicola.
• To determine if network properties and individual traits predict collective attack speed across developmental stages.

Main Methods:

• Observed resting interactions (individual, sub-group, group) at various intervals before collective prey attack.
• Analyzed social network metrics (average degree, closeness centrality) and boldness.
• Correlated network properties and boldness with predation speed (latency to attack).

Main Results:

• In adult spiders, higher group connectivity immediately before attack correlated with faster speeds.
• Lower social proximity of the boldest adult spider to others predicted faster attacks.
• Subadult spiders showed boldness correlated with attack speed, but no network predictors were found.

Conclusions:

• For adult social spiders, network position of bold individuals, not just boldness, influences collective attack speed.
• Social network structure and behavioral traits interact to define key individuals in collective actions.
• Different developmental stages may utilize distinct mechanisms for collective behavior and predation timing.