Abstract
BackgroundThe introduction of species to new regions is occurring at an increasing rate. These introductions typically consist of species that are deliberately introduced for the purposes of biological control of pests or of species that are accidentally introduced through human-mediated transport networks.Understanding the potential and actual impacts of these introduced species requires comprehensive information on their geographic distributions and biological associations.However, apart from a few well-known case studies, such information is lacking for many introduced species which severely hinders further assessment of risks and impact.New informationA dataset is provided on host associations, geographic distributions and dates of collection for both deliberately and accidentally-introduced parasitoid wasp species (Hymenoptera) in New Zealand. Information was obtained by digitising specimens from the New Zealand Arthropod Collection. Dates of records range from 1921 to 2017.The dataset includes 1265 specimen records, representing 127 parasitoid species from 12 families, with host records for 177 host species from 61 families and eight insect orders.These data provide baseline information to help evaluate the risk from introduced parasitoids to non-target and native species.
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