{"id":{"repo_id":"unt","oai_identifier":"info:ark/67531/metadc4716"},"canonical_url":"https://search.dev.ndltd.org/etd/unt/info:ark/67531/metadc4716","repository":{"repo_id":"unt","name":"University of North Texas","base_url":"https://digital.library.unt.edu/oai/"},"display":{"title":"Heart rate and oxygen consumption during the critical prenatal period in chicken embryos (Gallus gallus): Influence of light cues and the onset of pulmonary ventilation.","abstract":"To examine if a rhythm can be entrained in either heart rate or oxygen consumption in late stage embryos (days 17-19.5) with light as a zeitgeber, chicken embryos were incubated in complete darkness (D:D) and 12:12 light:dark cycle (L:D). Light had no impact on oxygen consumption (390 µL O2∙min-1∙egg-1) but increased heart rate for non-internally pipped embryos (260 to 270 beats∙min-1 during light cycle). Oxygen consumption increased independent of pipping while heart rate increased (255 to 265 beats∙min-1) in D:D embryos due to pipping. A light-induced rhythm or effect occurred in heart rate but not oxygen consumption, suggesting heart rate and oxygen consumption may be uncoupled.","abstract_html":"To examine if a rhythm can be entrained in either heart rate or oxygen consumption in late stage embryos (days 17-19.5) with light as a zeitgeber, chicken embryos were incubated in complete darkness (D:D) and 12:12 light:dark cycle (L:D). Light had no impact on oxygen consumption (390 µL O2∙min-1∙egg-1) but increased heart rate for non-internally pipped embryos (260 to 270 beats∙min-1 during light cycle). Oxygen consumption increased independent of pipping while heart rate increased (255 to 265 beats∙min-1) in D:D embryos due to pipping. A light-induced rhythm or effect occurred in heart rate but not oxygen consumption, suggesting heart rate and oxygen consumption may be uncoupled.","abstract_has_math":false,"creators":["Brown, Jessie W."],"institution":"University of North Texas","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Burggren, Warren W.","Dzialowski, Edward M.","Beitinger, Thomas L."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2004,"date_issued":"2004-12","date_published":"2004-12","updated_at":"2026-07-24T05:35:09Z","subjects":["Chickens -- Embryos -- Effect of light on.","Heart beat.","Chickens -- Respiration.","chicken embryos","rhythms","oxygen pulse","heart rate","oxygen consumption"],"languages":["English"],"rights":["Public","Copyright","Brown, Jessie W.","Copyright is held by the author, unless otherwise noted. All rights reserved."],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["oclc: 58652130","https://digital.library.unt.edu/ark:/67531/metadc4716/","ark: ark:/67531/metadc4716"],"render_values":[{"text":"oclc: 58652130","href":null,"code":true},{"text":"https://digital.library.unt.edu/ark:/67531/metadc4716/","href":"https://digital.library.unt.edu/ark:/67531/metadc4716/","code":true},{"text":"ark: ark:/67531/metadc4716","href":null,"code":true}]}]},"links":{"outbound_url":"https://doi.org/10.12794/metadc4716","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Burggren, Warren W.","Dzialowski, Edward M.","Beitinger, Thomas L."]},{"key":"dc:creator","label":"Author","values":["Brown, Jessie W."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2004-12"]},{"key":"dc:publisher","label":"Institution","values":["University of North Texas"]},{"key":"dc:type","label":"Dc Type","values":["Thesis or Dissertation"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Chickens -- Embryos -- Effect of light on.","Heart beat.","Chickens -- Respiration.","chicken embryos","rhythms","oxygen pulse","heart rate","oxygen consumption"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["Public","Copyright","Brown, Jessie W.","Copyright is held by the author, unless otherwise noted. 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A light-induced rhythm or effect occurred in heart rate but not oxygen consumption, suggesting heart rate and oxygen consumption may be uncoupled."]},{"key":"dc:format","label":"Dc Format","values":["Text"]},{"key":"dc:title","label":"Title","values":["Heart rate and oxygen consumption during the critical prenatal period in chicken embryos (Gallus gallus): Influence of light cues and the onset of pulmonary ventilation."]}]}],"canonical_facts":{"dc:contributor":["Burggren, Warren W.","Dzialowski, Edward M.","Beitinger, Thomas L."],"dc:creator":["Brown, Jessie W."],"dc:date":["2004-12"],"dc:description":["To examine if a rhythm can be entrained in either heart rate or oxygen consumption in late stage embryos (days 17-19.5) with light as a zeitgeber, chicken embryos were incubated in complete darkness (D:D) and 12:12 light:dark cycle (L:D). Light had no impact on oxygen consumption (390 µL O2∙min-1∙egg-1) but increased heart rate for non-internally pipped embryos (260 to 270 beats∙min-1 during light cycle). Oxygen consumption increased independent of pipping while heart rate increased (255 to 265 beats∙min-1) in D:D embryos due to pipping. A light-induced rhythm or effect occurred in heart rate but not oxygen consumption, suggesting heart rate and oxygen consumption may be uncoupled."],"dc:format":["Text"],"dc:identifier":["oclc: 58652130","doi: 10.12794/metadc4716","https://digital.library.unt.edu/ark:/67531/metadc4716/","ark: ark:/67531/metadc4716"],"dc:language":["English"],"dc:publisher":["University of North Texas"],"dc:rights":["Public","Copyright","Brown, Jessie W.","Copyright is held by the author, unless otherwise noted. All rights reserved."],"dc:subject":["Chickens -- Embryos -- Effect of light on.","Heart beat.","Chickens -- Respiration.","chicken embryos","rhythms","oxygen pulse","heart rate","oxygen consumption"],"dc:title":["Heart rate and oxygen consumption during the critical prenatal period in chicken embryos (Gallus gallus): Influence of light cues and the onset of pulmonary ventilation."],"dc:type":["Thesis or Dissertation"]},"updated_at":"2026-07-24T05:35:09Z"}