Avaliação da temperatura, umidade e vacinação in ovo

The figure 1 shows the chick/egg weight ratio (%) of Japanese quail eggs in
different temperatures from 35ºC up to 41ºC.
Chick/egg weight
80%
78%
76%
74%
72%
70%
68%
66%
64%
62%
60%
Figure 1. Chick/egg weight ratio (%) of Japanese quail eggs
incubated in different temperatures
66.7% d
72.7% c 72.6% c
75.5% a
73.2% bc 74.5% ab 73.2% bc
35 36 37 38 39 40 41
Incubation temperature (°C)
a,b,c,d Means in the columns with different superscripts differ significantly (P < 0.05)
The chick/egg weigh of Japanese quail chicks varied from 66.7% to 75.5%,
showing that incubation temperature promoted a variation up to 13% of Japanese quail
hatch weight. The highest proportional weights at hatch were observed for eggs
incubated at the 38ºC, 39°C 40ºC and 41ºC. Their means of hatch weight varied from
9.11g to 9.68g. They were followed by eggs incubated at 36ºC and 37ºC that had the
following hatch weight means 8.78g and 9.14g. The lowest weights at hatch were found
in eggs incubated at 35ºC that had a mean hatch weight of 8.45g. There was no hatch
for eggs incubated at 34°C. In general the higher incubation temperatures promoted
heavier quail chicks than the lower ones.
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