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.

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.

Grantor dc:publisher

University of North Texas

Year dc:date

2004

Author dc:creator

• Brown, Jessie W.

Contributors dc:contributor

• Burggren, Warren W.
• Dzialowski, Edward M.
• Beitinger, Thomas L.

• Chickens -- Embryos -- Effect of light on.
• Heart beat.
• Chickens -- Respiration.
• chicken embryos
• rhythms
• oxygen pulse
• heart rate
• oxygen consumption

Statement dc:rights

• Public
• Copyright
• Brown, Jessie W.
• Copyright is held by the author, unless otherwise noted. All rights reserved.

Language dc:language

English

Identifier

oclc: 58652130
https://digital.library.unt.edu/ark:/67531/metadc4716/
ark: ark:/67531/metadc4716

OAI identifier oai:identifier

info:ark/67531/metadc4716