{"id":{"repo_id":"uwo","oai_identifier":"oai:uwo.scholaris.ca:20.500.14721/28438"},"canonical_url":"https://search.dev.ndltd.org/etd/uwo/oai:uwo.scholaris.ca:20.500.14721/28438","repository":{"repo_id":"uwo","name":"Western University","base_url":"https://uwo.scholaris.ca/server/oai/request"},"display":{"title":"Overwintering biology of the brown marmorated stink bug, Halyomorpha halys (Hemiptera: Pentatomidae)","abstract":"The invasive crop pest Halyomorpha halys has been established in Ontario since 2012 and poses a significant threat to Canadian agriculture. I investigated the tolerance of H. halys to three stressors - low temperatures, desiccation, and energy depletion - in addition to investigating the role of lab-induced diapause in enhancing stress tolerance. Overwintering H. halys depress their supercooling point to -15.4 °C and LT50 to -17.5 °C after acute (1 h) exposure, however they do not encounter these temperatures while overwintering indoors. Moreover, overwintering H. halys maintain their water balance through a reduction of water loss rates, while conserving energy stores (lipids and carbohydrates). This is consistent with lab-reared-diapausing H. halys who exhibit reduced water loss rates and temperature-independent metabolic suppression relative to non-diapausing adults, suggesting that diapause enhances desiccation resistance and energy conservation. Thus, H. halys are likely to persist in Ontario barring any significant changes in overwintering conditions.","abstract_html":"The invasive crop pest Halyomorpha halys has been established in Ontario since 2012 and poses a significant threat to Canadian agriculture. I investigated the tolerance of H. halys to three stressors - low temperatures, desiccation, and energy depletion - in addition to investigating the role of lab-induced diapause in enhancing stress tolerance. Overwintering H. halys depress their supercooling point to -15.4 °C and LT50 to -17.5 °C after acute (1 h) exposure, however they do not encounter these temperatures while overwintering indoors. Moreover, overwintering H. halys maintain their water balance through a reduction of water loss rates, while conserving energy stores (lipids and carbohydrates). This is consistent with lab-reared-diapausing H. halys who exhibit reduced water loss rates and temperature-independent metabolic suppression relative to non-diapausing adults, suggesting that diapause enhances desiccation resistance and energy conservation. Thus, H. halys are likely to persist in Ontario barring any significant changes in overwintering conditions.","abstract_has_math":false,"creators":["Ciancio, John"],"institution":"The University of Western Ontario","degree_name":"M Sc","degree_level":null,"degree_discipline":"Biology","degree_department":null,"school":null,"contributors":[],"advisors":["Sinclair, Brent J.","Gariepy, Tara D."],"committee_chairs":[],"committee_members":[],"year":2018,"date_issued":"2018-10-02","date_published":"2018-10-02","updated_at":"2026-07-27T21:55:59Z","subjects":["Halyomorpha halys","overwintering","diapause","cold tolerance","water balance","energetics"],"languages":["en_ca"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/20.500.14721/28438","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Sinclair, Brent J.","Gariepy, Tara D."]},{"key":"dc:creator","label":"Author","values":["Ciancio, John"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2025-07-10T16:11:10Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2025-07-10T16:11:10Z"]},{"key":"dc:date.issued","label":"Date","values":["2018-10-02"]},{"key":"dc:publisher","label":"Institution","values":["The University of Western Ontario"]},{"key":"dc:type","label":"Dc Type","values":["thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Biology"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M Sc"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Halyomorpha halys","overwintering","diapause","cold tolerance","water balance","energetics"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_ca"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/20.500.14721/28438"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The thesis cover page in the PDF document includes references to Western University’s previous institutional repository platform, known as Scholarship@Western, and links to that platform (beginning with ir.lib.uwo.ca). In citing or referring to this thesis, use the DOI or handle from this page instead. Sample citation: Author name, \"Thesis title.\" (Year). Western University Open Repository. https://doi.org/10.71858/123456."]},{"key":"dc:description.abstract","label":"Abstract","values":["The invasive crop pest Halyomorpha halys has been established in Ontario since 2012 and poses a significant threat to Canadian agriculture. I investigated the tolerance of H. halys to three stressors - low temperatures, desiccation, and energy depletion - in addition to investigating the role of lab-induced diapause in enhancing stress tolerance. Overwintering H. halys depress their supercooling point to -15.4 °C and LT50 to -17.5 °C after acute (1 h) exposure, however they do not encounter these temperatures while overwintering indoors. Moreover, overwintering H. halys maintain their water balance through a reduction of water loss rates, while conserving energy stores (lipids and carbohydrates). This is consistent with lab-reared-diapausing H. halys who exhibit reduced water loss rates and temperature-independent metabolic suppression relative to non-diapausing adults, suggesting that diapause enhances desiccation resistance and energy conservation. Thus, H. halys are likely to persist in Ontario barring any significant changes in overwintering conditions."]},{"key":"dc:title","label":"Title","values":["Overwintering biology of the brown marmorated stink bug, Halyomorpha halys (Hemiptera: Pentatomidae)"]}]}],"canonical_facts":{"dc:contributor.advisor":["Sinclair, Brent J.","Gariepy, Tara D."],"dc:creator":["Ciancio, John"],"dc:date.accessioned":["2025-07-10T16:11:10Z"],"dc:date.available":["2025-07-10T16:11:10Z"],"dc:date.issued":["2018-10-02"],"dc:description":["The thesis cover page in the PDF document includes references to Western University’s previous institutional repository platform, known as Scholarship@Western, and links to that platform (beginning with ir.lib.uwo.ca). In citing or referring to this thesis, use the DOI or handle from this page instead. Sample citation: Author name, \"Thesis title.\" (Year). Western University Open Repository. https://doi.org/10.71858/123456."],"dc:description.abstract":["The invasive crop pest Halyomorpha halys has been established in Ontario since 2012 and poses a significant threat to Canadian agriculture. I investigated the tolerance of H. halys to three stressors - low temperatures, desiccation, and energy depletion - in addition to investigating the role of lab-induced diapause in enhancing stress tolerance. Overwintering H. halys depress their supercooling point to -15.4 °C and LT50 to -17.5 °C after acute (1 h) exposure, however they do not encounter these temperatures while overwintering indoors. Moreover, overwintering H. halys maintain their water balance through a reduction of water loss rates, while conserving energy stores (lipids and carbohydrates). This is consistent with lab-reared-diapausing H. halys who exhibit reduced water loss rates and temperature-independent metabolic suppression relative to non-diapausing adults, suggesting that diapause enhances desiccation resistance and energy conservation. Thus, H. halys are likely to persist in Ontario barring any significant changes in overwintering conditions."],"dc:identifier.uri":["https://hdl.handle.net/20.500.14721/28438"],"dc:language.iso":["en_ca"],"dc:publisher":["The University of Western Ontario"],"dc:subject":["Halyomorpha halys","overwintering","diapause","cold tolerance","water balance","energetics"],"dc:title":["Overwintering biology of the brown marmorated stink bug, Halyomorpha halys (Hemiptera: Pentatomidae)"],"dc:type":["thesis"],"thesis:degree_discipline":["Biology"],"thesis:degree_name":["M Sc"]},"updated_at":"2026-07-27T21:55:59Z"}