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- W2100103962 abstract "In most aphid species, the volatile sesquiterpene (E)-β-farnesene (Eβf) is released as an alarm pheromone in response to predation and is also emitted continuously at low levels. Some aphid predators use Eβf as a foraging cue, suggesting that the benefits to aphids of signaling via Eβf must be weighed against the cost of increasing apparency to natural enemies. To determine whether aphids vary Eβf production in response to features of their social environment, we compared the production of Eβf by Acyrthosiphon pisum (Harris) individuals reared in isolation with that of individuals reared among conspecifics or individuals of a different aphid species, Myzus persicae. Production of Eβf by A. pisum reared in isolation was significantly lower than that of aphids reared among conspecifics or among M. persicae individuals. When we reared A. pisum individuals in isolation but exposed them to odors from an aphid colony, Eβf production was similar to that of aphids reared among conspecifics, suggesting that aphids use a volatile cue to assess their social environment and regulate their production of alarm pheromone. It is likely that this cue is Eβf itself, the only volatile compound previously found in headspace collections of A. pisum colonies. Finally, we examined the attraction of a predatory hoverfly, which uses Eβf as a foraging cue, to groups of aphids reared in isolation or among conspecifics and found that groups comprising individuals reared in isolation were significantly less attractive to the predator, suggesting that the observed variation in Eβf production may be ecologically relevant." @default.
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- W2100103962 date "2009-01-01" @default.
- W2100103962 modified "2023-09-23" @default.
- W2100103962 title "Social enviroment influences aphid production of alarm pheromone" @default.
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- W2100103962 doi "https://doi.org/10.1093/beheco/arp009" @default.
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