Abstract
1. Abuoghaba A.A., 2017. Impact of spraying incubated eggs submitted to high temperature with ascorbic acid on embryonic development, hatchability, and some physiological responses of hatched chicks. Can. J. Anim. Sci. 97, 172–182, https://doi.org/10.1139/cjas-2... CrossRef Google Scholar
Highlights
During incubation, the development of chick embryos is affected by genetic makeup and many micro-environmental factors can influence dynamic processes in hatching eggs (Willemsen et al, 2010)
150 eggs were collected and divided into two incubation groups as follows: in the first group eggs were incubated at 37.5 °C and with 55% relative humidity (RH) up to day 18, while those from the second group were incubated at the same incubation temperature except 3 days, during which eggs were exposed to 40.0 °C and 55% RH for 3 h a day in the separate hatchery
It was noted that EW and EW8-day for eggs exposed to chronic incubation temperature (40.0 °C) did not differ from the group exposed to normal temperature, while the relative water loss (RWL) was significantly (P ≤ 0.05) increased
Summary
The development of chick embryos is affected by genetic makeup and many micro-environmental factors can influence dynamic processes in hatching eggs (Willemsen et al, 2010). The effects of different incubation temperatures and the duration of exposure on the hatchability and chick quality were described previously (Leksrisompong et al, 2007). Several attempts were made to reduce the harmful effects of high incubation temperature on chick embryos (Sgavioli et al, 2015; Abuoghaba, 2017). Abuoghaba (2017), for instance, sprayed hatching eggs with ascorbic acid after exposure to high temperature during the incubation period to reduce the heat stress of the chick embryos. There were injections of some anti-heat stress substances to hatching eggs during incubation or in ovo injections of bee pollen (BP) in order to ameliorate and reduce the adverse effect of heat stress (Coşkun et al, 2014)
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