Reproductive success in a socially polymorphic spider: social individuals experience depressed reproductive success in isolation

摘要: 1. Correlated individual differences in behaviour across ecological contexts, or behavioural syndromes, can theoretically constrain individuals' ability to optimally adjust their for specific contexts. 2. Female Anelosimus studiosus exhibit a unique polymorphism: ‘social’ females are tolerant of conspecifics and aggregate multi-female colonies, while ‘solitary’ aggressively defend singleton webs from intrusion by adult female conspecifics. Previous work found that social also less aggressive toward prey more fearful predators. 3. In this study we quantify potential fitness consequences these correlated behaviours examining the realised fecundities two phenotypes naturally occurring quantifying rear offspring as individuals. 4. There were no laboratory-reared between phenotypes, nor there field-collected brooding solitary nests. 5. Brooding colonies isolated new nests growing season both capable rearing broods; however, had significantly greater success. 6. These results suggest consequence reduced-aggression syndrome may represent general impediment evolution sociality spiders.