title: Metapopulation genetic structure of two coexisting parasitoids of the Glanville fritillary butterfly.
abstract: We investigated the metapopulation genetic structure of two specialist parasitoids, Cotesia melitaearum and Hyposoter horticola, attacking the Glanville fritillary butterfly (Melitaea cinxia) in the Aland Islands south-western Finland. The host butterfly persists as a classic metapopulation in a network of 4,000 small habitat patches within an area of 50 by 70 km . The two parasitoids are known to differ greatly in their population dynamics and spatial pattern of occupancy in local host populations. Analysis of genetic population structure using F(ST) and clustering of multilocus genotypes revealed a distinct large-scale spatial structure in C. melitaearum but a very weak pattern in H. horticola. This result is consistent with the known difference in the dispersal range (much longer in H. horticola) and population size (much greater in H. horticola) of the two parasitoids.
authors.affiliation: Department of Biological and Environmental Sciences, University of Helsinki, P.O. Box 65, 00014 Finland. maaria.kankare@helsinki.fi
authors.forename: Maaria
authors.initials: M
authors.lastname: Kankare
authors.forename: Saskya
authors.initials: S
authors.lastname: van Nouhuys
authors.forename: Oscar
authors.initials: O
authors.lastname: Gaggiotti
authors.forename: Ilkka
authors.initials: I
authors.lastname: Hanski
mesh_terms: D000818:Animals; D002080:Butterflies / Q000469:parasitology*; D004247:DNA / Q000235:genetics; D005260:Female; D005387:Finland; D005838:Genotype; D018895:Microsatellite Repeats; D011156:Population Density; D011157:Population Dynamics; D014863:Wasps / Q000235:genetics* / Q000472:pathogenicity
chemical_list: D004247:DNA