The relationship between eggshell porosity and oxygen consumption of the embryo in the domestic fowl

Artificial incubation and hand‐rearing of Humboldt penguins: Spheniscus humboldti at Birdworld, Farnham

“…An increase in weight loss during incubation observed in eggs of s. humboldti has also been reported for P. adelie and is associated with an increase in egg temperature as the embryo develops (Rahn & Hammel, 1982). This did not seem to produce any great problems for the embryos and hatchability was high despite previous results which show that low porosity eggshells restrict exchange of oxygen and carbon dioxide causing respiratory problems for fowl embryos late in incubation (Tullett & Deeming, 1982;Burton & Tullett, 1983).…”

Artificial incubation and hand‐rearing of Humboldt penguins: Spheniscus humboldti at Birdworld, Farnham

“…An increase in weight loss during incubation observed in eggs of s. humboldti has also been reported for P. adelie and is associated with an increase in egg temperature as the embryo develops (Rahn & Hammel, 1982). This did not seem to produce any great problems for the embryos and hatchability was high despite previous results which show that low porosity eggshells restrict exchange of oxygen and carbon dioxide causing respiratory problems for fowl embryos late in incubation (Tullett & Deeming, 1982;Burton & Tullett, 1983).…”

Hematological values and body, heart and liver weights of male and female broiler embryos of young and old breeder eggs

“…Increases in environmental oxygen during the last quarter of incubation increases oxygen consumption, as well as embryo growth and survival (Tazawa et al, 1992;Christensen et al, 1997). It is known that a lower number of pores per egg limits the oxygen available for the embryo (Tullett & Deeming, 1982) and reduces its growth rate (Burton & Tullett, 1983). In avian embryos, higher oxygen consumption and, consequently, higher metabolic rates and gas exchange, depends on two structural eggshell features: thickness and pore number.…”

Effects of egg mass and percentage mass loss during incubation on hatchability of eggs of the rock partridge ( Alectoris graeca )

“…The effects of %ML on hatchability observed in rock partridge eggs are similar to that observed for turkey and goose eggs Ar, 1987, 1991). In particular, there was lower hatchability for eggs with a low weight loss and this probably reflects the adverse effects of low eggshell conductance on oxygen consumption and embryonic growth (Tullett and Deeming, 1982;Burton and Tullett, 1983).…”

Artificial incubation and hand‐rearing of Humboldt penguins: Spheniscus humboldti at Birdworld, Farnham

“…An increase in weight loss during incubation observed in eggs of s. humboldti has also been reported for P. adelie and is associated with an increase in egg temperature as the embryo develops (Rahn & Hammel, 1982). This did not seem to produce any great problems for the embryos and hatchability was high despite previous results which show that low porosity eggshells restrict exchange of oxygen and carbon dioxide causing respiratory problems for fowl embryos late in incubation (Tullett & Deeming, 1982;Burton & Tullett, 1983).…”

Hematological values and body, heart and liver weights of male and female broiler embryos of young and old breeder eggs

“…Increases in environmental oxygen during the last quarter of incubation increases oxygen consumption, as well as embryo growth and survival (Tazawa et al, 1992;Christensen et al, 1997). It is known that a lower number of pores per egg limits the oxygen available for the embryo (Tullett & Deeming, 1982) and reduces its growth rate (Burton & Tullett, 1983). In avian embryos, higher oxygen consumption and, consequently, higher metabolic rates and gas exchange, depends on two structural eggshell features: thickness and pore number.…”

Effects of egg mass and percentage mass loss during incubation on hatchability of eggs of the rock partridge ( Alectoris graeca )

“…The effects of %ML on hatchability observed in rock partridge eggs are similar to that observed for turkey and goose eggs Ar, 1987, 1991). In particular, there was lower hatchability for eggs with a low weight loss and this probably reflects the adverse effects of low eggshell conductance on oxygen consumption and embryonic growth (Tullett and Deeming, 1982;Burton and Tullett, 1983).…”

Artificial incubation and hand‐rearing of Humboldt penguins: Spheniscus humboldti at Birdworld, Farnham

“…An increase in weight loss during incubation observed in eggs of s. humboldti has also been reported for P. adelie and is associated with an increase in egg temperature as the embryo develops (Rahn & Hammel, 1982). This did not seem to produce any great problems for the embryos and hatchability was high despite previous results which show that low porosity eggshells restrict exchange of oxygen and carbon dioxide causing respiratory problems for fowl embryos late in incubation (Tullett & Deeming, 1982;Burton & Tullett, 1983).…”

Hematological values and body, heart and liver weights of male and female broiler embryos of young and old breeder eggs

“…Increases in environmental oxygen during the last quarter of incubation increases oxygen consumption, as well as embryo growth and survival (Tazawa et al, 1992;Christensen et al, 1997). It is known that a lower number of pores per egg limits the oxygen available for the embryo (Tullett & Deeming, 1982) and reduces its growth rate (Burton & Tullett, 1983). In avian embryos, higher oxygen consumption and, consequently, higher metabolic rates and gas exchange, depends on two structural eggshell features: thickness and pore number.…”

Effects of egg mass and percentage mass loss during incubation on hatchability of eggs of the rock partridge ( Alectoris graeca )

“…The effects of %ML on hatchability observed in rock partridge eggs are similar to that observed for turkey and goose eggs Ar, 1987, 1991). In particular, there was lower hatchability for eggs with a low weight loss and this probably reflects the adverse effects of low eggshell conductance on oxygen consumption and embryonic growth (Tullett and Deeming, 1982;Burton and Tullett, 1983).…”