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ORIGINAL PAPER High individual variation in pheromone production

High individual variation in pheromone production
by tree-killing bark beetles
(Coleoptera: Curculionidae: Scolytinae)
Deepa S. Pureswaran & Brian T. Sullivan &
Matthew P. Ayres
Received: 18 December 2006 /Revised: 13 June 2007 /Accepted: 28 June 2007 / Published online: 28 July 2007
# Springer-Verlag 2007
Abstract Aggregation via pheromone signalling is essen-
tial for tree-killing bark beetles to overcome tree defenses
and reproduce within hosts. Pheromone production is a trait
that is linked to fitness, so high individual variation is
paradoxical. One explanation is that the technique of
measuring static pheromone pools overestimates true
variation among individuals. An alternative hypothesis is
that aggregation behaviour dilutes the contribution of
individuals to the trait under selection and reduces the
efficacy of natural selection on pheromone production by
individuals. We compared pheromone measurements from
traditional hindgut extractions of female southern pine


Source: Ayres, Matthew.P. - Department of Biological Sciences, Dartmouth College


Collections: Environmental Sciences and Ecology