Behaviour 2019
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Aggressive males are more attractive to females and more likely to win contests in jumping spiders
Bernetta Z.W. Kwek1, Min Tan1, Long Yu1,2, Wei Zhou1, Chia-chen Chang1, Daiqin Li1. 1National University of Singapore, Singapore, Singapore, Singapore; 2Hubei University, Wuhan, Hubei, China

Consistent interindividual differences in behavior and intraindividual variability in behavior are common across animal taxa. However, how personality and behavioral predictability of males and females influence sexual selection remains poorly understood. Here, we investigated this in the jade jumping spider, Siler semiglaucus. After assessing the level of aggression and aggression predictability of males and females, we performed female mate choice trials to test if aggression and aggression predictability in females, males, or both would affect female mate choice. We also conducted male contest trials to test if male aggression or aggression predictability would influence the outcomes of male contests. Both females and males showed consistent interindividual differences in aggression. Females showed a directional preference for aggressive males over docile males regardless of female aggression or aggression predictability. Predictably aggressive males were also more likely to win contests. Our results suggest that both female mate choice and male-male competition favor males with high aggression, and thus total sexual selection that acts on male aggression may be enforcing.