Using conservation genetics to inform reintroduction of the endangered Mottled Duskywing (Erynnis martialis)

Background/Question/Methods

Habitat loss paired with climate change have caused declines in species diversity and abundance across the globe, including in butterflies which are important components of many ecosystems. Butterflies are important as they provide services and serve as important indicators of environmental health. Reintroductions are increasingly used to reverse loss of diversity but are most effective when informed using genetic data. The Mottled Duskywing (Erynnis martialis) is a medium-sized, brown butterfly listed as Endangered in Ontario, and reintroductions have been begun as part of the species Recovery Plan. I developed 24 microsatellite markers and characterized genetic structure and diversity of the endangered Mottled Duskywing (Erynnis martialis) in Ontario and nearby locations. These were used to inform planned reintroductions through the recommendation of a source population.

Results/Conclusions

I found that populations had moderate levels of genetic diversity and were differentiated from each other. These results have informed a reintroduction of the species to Pinery Provincial Park through the selection of the source population for the reintroduction. My work forms part of a larger effort to achieve the overall recovery goal of the species in Ontario and will support a locally sourced model for insect species-at-risk recovery planning. Tools developed in my research may be used to inform future reintroductions of the species, and to monitor success and status of the introduced populations.