Data from: Small spermatophore size and reduced female fitness in an isolated butterfly population

dc.contributor.affiliationUniversity of Helsinki - Duplouy, Anne
dc.contributor.affiliationUniversity of Helsinki - Hanski, Ilkka
dc.contributor.authorDuplouy, Anne
dc.contributor.authorHanski, Ilkka
dc.coverage.spatialAland islands Finland
dc.coverage.spatialPikku Tytärsaari Russia
dc.date.accessioned2025-03-24T15:11:34Z
dc.date.issued2015-10-16
dc.date.issued2015-10-16
dc.descriptionThe Glanville fritillary butterfly (Melitaea cinxia) has a small population (Ne ~100) on the small island of Pikku Tytärsaari (PT) in the Gulf of Finland. The population has remained completely isolated for ~100 generations, which has resulted in greatly reduced genetic variation and high genetic load (low fitness). In particular, females lay small egg clutches with low egg-hatching rate in comparison with a large reference population in the Åland Islands (ÅL). Here, we analyze to what extent egg clutch size and egg-hatching rate are influenced by male population and spermatophore size. Spermatophore size increases with male body size, is smaller after the first mating, and is smaller in the small PT population. In the ÅL population but not in the PT population, egg-hatching rate increases with spermatophore size. Egg-hatching rate of PT females is higher when mated with ÅL males than when mated with PT males (heterosis), but there is no such effect on clutch size. Clutch size of ÅL females is however reduced when mated with PT males. These results indicate that both male and female traits contribute to reduced reproductive fitness in the small isolated population.
dc.identifierhttps://doi.org/10.5061/dryad.7p42b
dc.identifier.urihttps://hydatakatalogi-test-24.it.helsinki.fi/handle/123456789/9255
dc.rightsOpen
dc.rights.licensecc-zero
dc.subjectMelitaea cinxia
dc.subjectpopulation isolation
dc.subjectegg-hatching rate
dc.subjectSpermatophore
dc.subjectlast 100 years
dc.titleData from: Small spermatophore size and reduced female fitness in an isolated butterfly population
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