Variation in Captures of Adult Winter Moths (<i>Operophtera brumata</i>) in Coastal Maine Over Two Years

O'Donnell, Kaitlyn M; Groden, Eleanor

doi:10.1656/045.024.s709

Cited by 2 publications

(2 citation statements)

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“…Two factors that have been proposed to limit winter moth flight are subzero temperatures (O'Donnell and Groden 2017) and heavy snowfall (Peterson and Nilssen 1998). Factors that might limit Bruce spanworm flight are unknown, but we expect that given their shared evolutionary histories, that they might be the same as for winter moth.…”

Section: Discussionmentioning

confidence: 99%

“…To explore whether flight for either species might be terminated by the onset of subzero temperatures (O'Donnell and Groden 2017) or heavy snow fall (Peterson and Nilssen 1998) we obtained daily maximum temperature (tmax) and daily snow water equivalent (swe) and data for each trap location from 1 January 2016 through 28 February 2019 using the DayMet “single pixel extraction tool” (Thornton et al 2020).…”

Section: Methodsmentioning

confidence: 99%

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Seasonal differences in the timing of flight between the invasive winter moth and native Bruce spanworm promotes reproductive isolation

Andersen

Havill

Chandler

et al. 2023

Environmental Entomology

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The European winter moth, Operophtera brumata L. (Lepidoptera: Geometridae), was accidentally introduced to North America on at least 4 separate occasions, where it has been hybridizing with the native Bruce spanworm, O. bruceata Hulst, at rates up to 10% per year. Both species are known to respond to the same sex pheromones and to produce viable offspring, but whether they differ in the seasonal timing of their mating flights is unknown. Therefore, we collected adult male moths weekly along 2 transects in the northeastern United States and genotyped individuals using polymorphic microsatellite markers as males of these 2 species cannot be differentiated morphologically. Along each transect, we then estimated the cumulative proportions (i.e., the number of individuals out of the total collected) of each species on each calendar day. Our results indicate that there are significant differences between the species regarding their seasonal timing of flight, and these allochronic differences likely are acting to promote reproductive isolation between these 2 species. Lastly, our results suggest that the later flight observed by winter moth compared to Bruce spanworm may be limiting its inland spread in the northeastern United States because of increased exposure to extreme winter events.

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Section: Discussionmentioning

confidence: 99%