Influence of Oxygen Concentration on Hatchability and on Selecting for Hatchability , ,

Hatching Time and Hatchability in the Fowl

“…This effect could then explain the increased heritability of hatchability of stored eggs as observed by Abplanalp and Kosin (1953). A similar ar-gument could be applied to the results of Davis (1955) who observed a higher heritability of hatchability in eggs hatched at high altitudes without supplemental oxygen, than when the eggs were hatched with supplemental oxygen.…”

“…Hereditary differences are also suggested by Wilgus and Sadler (1954), who further observed that the greatest hatchability response to added oxygen was obtained from individuals with the lowest hatchability without oxygen. Davis (1955) also observed individual hen differences and found that the heritability of hatchability was higher when estimated from air-hatched eggs than when oxygen supplementation was used. The interaction between hens and oxygen levels as reported by Wilgus and Sadler (1954) was not observed by Davis (1955).…”

“…Davis (1955) also observed individual hen differences and found that the heritability of hatchability was higher when estimated from air-hatched eggs than when oxygen supplementation was used. The interaction between hens and oxygen levels as reported by Wilgus and Sadler (1954) was not observed by Davis (1955).…”

“…Thompson (1952) reports finding as many as 80 percent late dead embryos. Such late dead embryos were examined by Davis (1955) to determine if they were truly dead or merely unhatched, but the result of such examination was not reported. Thompson (1952) also states that eggs incubated under hens hatch equally well from sea level to 10,000 feet in altitude.…”

Selection for Increased Hatchability at High Altitude

“…S UB-OPTIMAL environments have been effective in increasing the heritability of polygenic traits such as growth rate in mice (Falconer and Latyszewski, 1952) and hatchability in turkeys (Davis, 1955;Moreng and Thornton, 1958). High altitude is a sub-optimal environment for incubation of turkey and chicken eggs.…”