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International audienceEvery dioecious species of fig is pollinated by a specific wasp that only reproduces within the inflorescences of male trees. Pollinators usually die within the closed urn–shaped inflorescence (fig or syconium) they visit. Thus pollinators that enter female syconia allow seed production but die without reproducing. In a previous study, pollinators of one dioecious fig where male and female trees flower synchronously, Ficus hispida, did not exhibit differential attraction or choice between inflorescences of the two sexes. Here we show that Blastophaga psenes, the pollinator of another dioecious species of different lineage, the common fig F. carica), significantly avoided female syconia, when we experimentally induce a situation of choice. Paradoxically, choosiness can be demonstrated in F. carica; where usually wasps do not face a choice because male and female trees do not flower synchronously. We discuss how the mutualism may be stable despite this discrimination and hypothesize why the two species of fig–pollinators exhibit different behaviour on dioecious figs

Partial avoidance of female inflorescences of a dioecious fig by their mutualistic pollinating wasps