Population dynamics and sex ratio of a parasitoid altered by fungal-infected diet of host butterfly.

ABSTRACT: Variation of host quality affects population dynamics of parasitoids, even at the landscape scale. What causes host quality to vary and the subsequent mechanisms by which parasitoid population dynamics are affected can be complex. Here, we examine the indirect interaction of a plant pathogen with a parasitoid wasp. Under laboratory conditions, parasitoids from hosts fed fungus-infected plants weighed less than those from hosts fed uninfected plants, indicating that the fungus causes the hosts to be of poor quality. However, parasitoids reared from hosts fed fungal-infected diet also tended to be female, a characteristic associated with high host quality. The pathogen, herbivore and parasitoid persist regionally as metapopulations in a shared landscape in Aland, Finland. In an analysis of t

SUBMITTER: van Nouhuys S 

PROVIDER: S-EPMC2596907 | biostudies-literature | 2008 Apr

REPOSITORIES: biostudies-literature