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Experiments with sex allocation in parasitic wasps offer excellent opportunities for testing how the way in which organisms process information about their environment influences behaviour. If mating takes place in temporary patches, where only a small number of females produce offspring, then sex allocation theory predicts a female-biased sex ratio. When(More)
Models of insect-pathogen interactions in highly seasonal environments are developed. The models apply to insects such as many temperate forest pests that have a single generation per year and which are susceptible to viral disease only during their larval period. The disease kills the hosts after a fixed time period when infectious pathogen particles are(More)
The parasitoid wasp genus Achrysocharoides (Eulophidae) is unusual in that many of its species lay male and female eggs in single-sex clutches. The average clutch size of female broods is always greater than that of male broods, and in some species male clutch size is always one. We constructed models that predicted that severely egg-limited wasps should(More)
In haplodiploid species, the presence of unmated (virgin) females that can produce only haploid male offspring may have several important effects on a range of phenomena such as reproductive strategies, the transmission of parasitic chromosomes and the evolution of eusociality. The strength of these effects will depend upon the prevalence of virgin females.(More)
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