Polistes biglumis is a species that in Southern Europe lives at high altitude where generally cold temperatures exert a selective pressure. Colonies of P biglumis may be parasitized by the obligate and permanent social parasite P atrimandibularis and suffer a drastic reduction in fitness. Locally, parasite prevalence is high and parasitism costs to hosts are elevated; under these conditions hosts are selected to evolve counter-adaptations against parasites. " Comparing the behaviour of P biglumis femules from three populations under ,different combinations of selective pressures (cold temperature and social parasitism) we show how different selective pressures operate and differentiate the life cycle and behaviour of local populations.
Local adaptations in Polistes biglumis expression of sociality (Hymenoptera Vespidae).
DI BONA, Valeria;LORENZI, Maria Cristina
2003-01-01
Abstract
Polistes biglumis is a species that in Southern Europe lives at high altitude where generally cold temperatures exert a selective pressure. Colonies of P biglumis may be parasitized by the obligate and permanent social parasite P atrimandibularis and suffer a drastic reduction in fitness. Locally, parasite prevalence is high and parasitism costs to hosts are elevated; under these conditions hosts are selected to evolve counter-adaptations against parasites. " Comparing the behaviour of P biglumis femules from three populations under ,different combinations of selective pressures (cold temperature and social parasitism) we show how different selective pressures operate and differentiate the life cycle and behaviour of local populations.
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