Heart rate response to egg rotation in the domestic fowl embryo

Vince, Margaret A.; Clarke, Jon; Reader, M.

doi:10.1080/00071667908416575

Cited by 14 publications

(2 citation statements)

References 19 publications

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“…This is probably a re¯ection of the retarded development of embryos in unturned eggs. By contrast, during actual turning events heart rate is usually increased (Vince et al, 1979).…”

Section: Egg Turning and The Avian Embryomentioning

confidence: 94%

Electrolyte and Water Balance of the Early Avian Embryo: Effects of Egg Turning

Baggott¹,

Deeming²,

Latter³

2002

Avian & Poul. Biolog. Rev.

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Formation of sub-embryonic fluid (SEF) is a key aspect of the physiology of the early avian embryo. Here we review the process of SEF formation and the factors which influence its composition and the rate of SEF production and depletion in the Japanese quail and domestic fowl. There is particular emphasis on the role of turning of the egg during incubation and we briefly consider the broader role of egg turning during avian incubation. The bulk of the review deals with the growth of the area vasculosa of the yolk sac membrane, the cellular processes of SEF formation, and the water and electrolyte physiology of the avian embryo during the first half of incubation.We conclude with a brief discussion of the areas for future investigation.

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“…This is probably a re¯ection of the retarded development of embryos in unturned eggs. By contrast, during actual turning events heart rate is usually increased (Vince et al, 1979).…”

Section: Egg Turning and The Avian Embryomentioning

confidence: 94%

Electrolyte and Water Balance of the Early Avian Embryo: Effects of Egg Turning

Baggott¹,

Deeming²,

Latter³

2002

Avian & Poul. Biolog. Rev.

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“…Embryos showed increased heart rate during the late prenatal period in response to egg rotation (Vince, Clarke, & Reader, 1979). Tolhurst and Vince (1976) found that domestic fowl embryos' heart rate increased in response to particular odorants presented after internal pipping (penetration of the air space in the upper portion of the egg in preparation for hatching).…”

Section: Introductionmentioning

confidence: 98%

Effects of prenatal visual stimulation on growth and heart rate in bobwhite quail (Colinus virginianus)

Sleigh

Birchard

2006

Dev. Psychobiol.

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This study examined the effects of prenatal visual stimulation on bobwhite quail embryos' growth and heart rate. No differences in growth rate were found between embryos exposed to visual stimulation during the late prenatal period and control embryos. Embryos exposed to visual stimulation throughout incubation maintained lower heart rates in response to visual stimulation than did naïve embryos. In a subsequent experiment, naïve embryos that underwent an egg-opening procedure exhibited heart rates that were lower than embryos measured in intact eggshells. Embryos in opened eggs maintained lower heart rates than comparison embryos across time; however, a less invasive egg-opening procedure led to a quicker heart rate recovery than did a more invasive egg-opening procedure. These findings indicate that prenatal heart rate responses may be mediated by multiple features of the organism's developmental context, including intensity and duration of sensory stimulation.

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Failure to turn eggs during incubation: Development of the area vasculosa and embryonic growth

Deeming¹

1989

Journal of Morphology

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Effect of turning of the egg during incubation on development of the area vasculosa of the chick embryo was investigated. The size of the area vasculosa was determined by two methods: direct measurement with calipers and measurement of a template cut from the eggshell by use of an automatic surface area recorder. The effects of turning and additionally the effects of lowered temperature (36°C) on both growth of the area vasculosa by day 7 and embryo growth by day 14 of incubation were investigated. The effects of turning during a critical period for turning, from 3 to 7 days of incubation, were also recorded. Generally, failure to turn eggs retarded growth of the area vasculosa. Turning during the critical period stimulated the extent of growth of the area vasculosa by day 7 of incubation and of subsequent embryonic growth by day 14. Incubation at low temperature resulted both in reduced expansion of the area vasculosa and retarded embryonic growth in a pattern similar to that observed for unturned eggs. It is suggested that turning stimulates development of blood vessels in the area vasculosa via localized increases in blood pressure. The effect of a reduced area vasculosa is considered to retard embryonic development through restricted nutrient uptake from the yolk. The prevailing hypothesis that turning prevents deleterious membrane adhesions is questioned in light of these observations. It is suggested that the physiological basis for the need for turning lies in maximizing the growth rate of the area vasculosa to maximize yolk use and embryonic growth rate.

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Heart rate response to egg rotation in the domestic fowl embryo

Cited by 14 publications

References 19 publications

Electrolyte and Water Balance of the Early Avian Embryo: Effects of Egg Turning

Electrolyte and Water Balance of the Early Avian Embryo: Effects of Egg Turning

Effects of prenatal visual stimulation on growth and heart rate in bobwhite quail (Colinus virginianus)

Failure to turn eggs during incubation: Development of the area vasculosa and embryonic growth

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