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The effects of exposure to cold during incubation on developmental stability, fear, growth, and carcass traits in Japanese quails

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Abstract

The aim of this study was to determine the effects of 6 h/day cold (35.0 °C) acclimatization between the 9th and 15th days of incubation of Japanese quail embryos on hatchability, livability, chick quality, developmental stability, fear response, live weight, and slaughter-carcass characteristics. Two homologous incubators and a total of 500 hatching eggs were used in the study. Randomly selected half of the eggs were exposed to cold according to the eggshell temperature. The cold acclimation of Japanese quail embryos had no adverse effects on all mentioned traits, except for chick quality. Chicks in the control group had higher Tona scores (99.46) than those exposed to cold (99.00) (P < 0.05). In addition, there were differences among the treatment groups in terms of the parameters of mature weight (β0), instantaneous growth rate (β2), and inflection point coordinates of the Gompertz growth model (P < 0.05 for all). It was found that exposing embryos to cold during the incubation changed the shape of the growth curve. As the development of embryos exposed to cold slows down, a compensatory growth occurs in the early posthatch period. Thus, the growth rate increased in the period before the inflection point of the growth curve.

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Funding

This study was carried out with the support of the TUBITAK (The Scientific and Technological Research Council of Turkey) 2209A project.

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Correspondence to Doğan Narinç.

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Karakelle, H., Özçalişan, G., Şahin, F. et al. The effects of exposure to cold during incubation on developmental stability, fear, growth, and carcass traits in Japanese quails. Int J Biometeorol 67, 1303–1310 (2023). https://doi.org/10.1007/s00484-023-02497-1

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  • DOI: https://doi.org/10.1007/s00484-023-02497-1

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