Environmental induction of larval diapause and life-history consequences of post-diapause development in the Large Copper butterfly, Lycaena dispar (Lepidoptera: Lycaenidae)

Kim, Seong-Hyun; Kim, Nam Jung; Hong, Seong-Jin; Lee, Young-Bo; Park, Hae-Chul; Je, Yeon-Ho; Lee, Kwang Pum

doi:10.1007/s10841-014-9678-9

Cited by 2 publications

(1 citation statement)

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“…The thermal development thresholds of O. poweshiek are unknown; Dearborn and Westwood (2014) used 6 °C as the lower threshold, based on studies of other Lepidoptera that overwinter as larvae in this region. The diapause-inducing conditions likely comprise a combination of temperature and photoperiod, as has been observed for other butterflies (Kim et al 2014). Given this uncertainty, we assumed that larvae would be inactive approximately when the minimum daily temperature was below 0 °C and during a shorter photoperiod (late fall and early spring), with developmental conditions likely deteriorating from September to December.…”

Section: Egg Enclosures July 2018 To July 2019mentioning

confidence: 99%

Endangered Oarisma poweshiek larvae vary their graminoid forage in Manitoba, Canada

Henault

Westwood

2022

Can Entomol

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The Poweshiek skipperling (Oarisma poweshiek) is endemic to the tall grass prairie in North America and is now critically endangered globally. Existing populations are scattered among tall grass prairie remnants. However, the host food plants eaten by Poweshiek skipperling larvae, the vegetative and microclimatic descriptions of immature and adult microhabitats, and O. poweshiek behaviour in Manitoba are unknown. We followed Poweshiek skipperling adults in their natural habitat to locate microhabitats where eggs were laid and to observe larval foraging behaviour and development. We measured vegetative, structural, and microclimatic characteristics of microhabitats used by immatures and documented the host species larvae consumed, their general behaviour (on plants; movement within microhabitats), and their developmental schedules. Larvae ate Andropogon gerardi, Muhlenbergia richardsonis, Sporobolus heterolepis, and Schizachyrium scoparium (all Poaceae) in natural tall grass prairie. Larvae appeared to navigate microhabitats to locate host food plants, alternating between shoots of various species throughout their development. Microhabitats seemed to be more open, with drier microclimates, than areas where eggs were not laid. This improved understanding of larval feeding patterns, adult behaviours, and microhabitat attributes may help local grassland stewards and researchers reduce the list of possible causes of decline and identify potential solutions to recover the Poweshiek skipperling.

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Section: Egg Enclosures July 2018 To July 2019mentioning

confidence: 99%