The Effect of Low and High Temperature Exposure of Chicken Embryos During Incubation on Hatchability and Subsequent Growth Rate, Feed Efficiency, Mortality, Sex Ratios and Carcass Quality |
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19 days 24 hours 36 hours approximately average weight gain carcasses chi-square chicken embryos chicks cold compared Cont CONTINUED Control Group cooling Crosses day embryos exposed day of incubation days 11 days days 21 decrease in hatchability delayed determine diet early effect embryonated eggs environment et.al exposed to low feed conversion fertile formula Four day embryos grade Groups in Experiment growing period hatching Heavies High Temperature Exposure higher increased influence internal temperature low and high low temperature Low Temperature Exposure lower means measured mortality Nineteen day embryos normal number of observations obtained optimum percent protein range reached relative growth rate reported resistance Romanoff sex ratios short showed significant difference significantly similar standard incubation temperature student t-test studied suggest Tables 11 tempera tested three embryonic stages treated treatment ture values week week growing period Wk 3 Wk