EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/26/2021 | 8:30 AM - 10:30 AM | PHENOLOGICAL AND ISOTOPIC EVIDENCE FOR MIGRATION AS A LIFE HISTORY STRATEGY IN AESHNA CANADENSIS (FAMILY: AESHNIDAE) DRAGONFLIES | Virtual Platform
PHENOLOGICAL AND ISOTOPIC EVIDENCE FOR MIGRATION AS A LIFE HISTORY STRATEGY IN AESHNA CANADENSIS (FAMILY: AESHNIDAE) DRAGONFLIES
Investigating dragonfly migration is important for understanding species’ life history strategies, migratory connectivity, terrestrial-aquatic linkages, and for successful species conservation. We investigated the potential for migration of Aeshna canadensis using phenological observations in three study ponds in central Minnesota, 2017 – 2019. We also conducted probabilistic assignment to natal origins by measuring stable hydrogen isotope values of wing tissue of dragonflies collected in Minnesota and acquired through Canadian museum collections. This species emerged May – June from study ponds in central Minnesota, with a 10 – 15 week lag after emergence before mature adults were observed in late summer. The probabilistic assignment depictions of emerging tenerals overlapped with the sampling location, confirming accuracy of isotopic assignments of natal origin. Late-flying adults collected at our study ponds likely originated from southern Manitoba, suggesting a north-south migration pathway. We found further evidence for migration by analyzing wing tissue of adult dragonflies collected in northern Minnesota and south-central Canada. We provide the first conclusive evidence of Aeshna migration in North America and demonstrate a robust approach, combining field observations with stable isotope analysis, which can test for migration in other dragonfly populations.
- Connectivity
- Aquatic–terrestrial biodiversity
- Biodiversity
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Presenters/Authors
Emily Schilling
(), Augsburg University, schillin@augsburg.edu;
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Kevin Kardynal
(), Environment and Climate Change Canada, kevin.kardynal@canada.ca;
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Holly Kundel
(), University of Minnesota, kunde058@umn.edu;
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Zephyr Crews-Erjavek
(), Augsburg University, zephyr.crewserjavec@gmail.com;
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John Zobitz
(), Augsburg University, zobitz@augsburg.edu;
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Keith Hobson
(), University of Western Ontario, khobson6@uwo.ca;
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