{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,12]],"date-time":"2026-09-12T02:45:45Z","timestamp":1789181145875,"version":"build-2803163510"},"reference-count":52,"publisher":"Oxford University Press (OUP)","issue":"1","license":[{"start":{"date-parts":[[2024,10,25]],"date-time":"2024-10-25T00:00:00Z","timestamp":1729814400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2025,2,19]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Diapause regulates seasonal insect life cycles and may be highly variable within and among populations due to genetic and environmental variability. Both types of variation may influence how populations respond plastically or evolutionarily to changing climates. We assessed diapause variability in spruce beetle Dendroctonus rufipennis Kirby (Coleoptera: Curculionidae, Scolytinae), a major forest pest whose life cycle timing is regulated by both prepupal and adult diapauses. Using mating studies and ovary dissections, we tested for variability in adult diapause within and between collection sites in Colorado and Wyoming, USA. Ovary morphology suggested that most females from both sites enter diapause prior to egg formation (oogenesis) when reared at warm temperatures. Though previous studies suggested that adult diapause is obligate, we found that a small proportion of females from both populations terminated diapause without winter chilling in the lab. Moreover, we found that most female beetles sampled at the Colorado field site had mature ovaries relatively early in the fall, suggesting that transient exposure to low temperatures may potentiate pre-winter reproductive development. Adult diapause may act primarily as a block to prevent offspring production late in the season but not necessarily as an overwintering phenotype. Overall, our data do not suggest imminent life cycle shifts mediated by adult diapause, but if the observed variability is heritable, diapause regulation may evolve in response to changing environmental conditions.<\/jats:p>","DOI":"10.1093\/ee\/nvae104","type":"journal-article","created":{"date-parts":[[2024,10,25]],"date-time":"2024-10-25T11:11:03Z","timestamp":1729854663000},"page":"154-166","source":"Crossref","is-referenced-by-count":1,"title":["Variability in spruce beetle (Coleoptera: Curculionidae, Scolytinae) adult diapause and evidence for oocyte development prior to winter in a Colorado population"],"prefix":"10.1093","volume":"54","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1574-1947","authenticated-orcid":false,"given":"Marianne E","family":"Davenport","sequence":"first","affiliation":[{"name":"Department of Integrative Biology, University of Colorado Denver , Denver, CO ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2741-1542","authenticated-orcid":false,"given":"Barbara J","family":"Bentz","sequence":"additional","affiliation":[{"name":"Rocky Mountain Research Station, USDA Forest Service , Logan, UT ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9299-3948","authenticated-orcid":false,"given":"E Matthew","family":"Hansen","sequence":"additional","affiliation":[{"name":"Rocky Mountain Research Station, USDA Forest Service , Logan, UT ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6501-3641","authenticated-orcid":false,"given":"Gregory J","family":"Ragland","sequence":"additional","affiliation":[{"name":"Department of Integrative Biology, University of Colorado Denver , Denver, CO ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2024,10,25]]},"reference":[{"issue":"12","key":"2025021914025105900_CIT0001","doi-asserted-by":"publisher","first-page":"1475","DOI":"10.1111\/j.1461-0248.2010.01534.x","article-title":"Tell me what you eat and I\u2019ll tell you when you fly: diet can predict phenological changes in response to climate change","volume":"13","author":"Altermatt","year":"2010","journal-title":"Ecol. 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