- Data from: Increased fluctuation in a butterfly metapopulation leads to diploid males and decline of a hyperparasitoid(2018-07-23) Nair, Abhilash; Nonaka, Etsuko; van Nouhuys, Saskya; University of Helsinki - Nair, Abhilash; University of Helsinki - Nonaka, Etsuko; University of Helsinki - van Nouhuys, Saskya