American Ornithological Society

Low extra-pair paternity and climatic associations in a Patagonian population of Chilean Swallows
2026-03-30 12:00 - 13:00 (America/New_York) | https://americanornithology-org.zoom.us/webinar/register/WN_Y6y9q_RMSV6q0_ECi2CH7Q
AOS Student Research Grant Seminar
Presenter: Bruno Riovitti, Ph.D. student, University of Buenos Aires, 2023 Student Research Grant winner

Intraspecific variation in extra-pair paternity (EPP) continues to intrigue researchers, as the factors shaping this trait remain only partially understood. In this talk, I present genomic parentage analyses from a Patagonian population of Chilean Swallows (Tachycineta leucopyga) and resulting estimates of EPP rates , motivated by previous reports of exceptionally low EPP rates in the species at high southern latitudes. I show that EPP rates remain consistently low across two breeding seasons and that EPP probability is significantly associated with local climatic conditions.
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