Temperature during the last week of incubation. I. Effects on hatching pattern and broiler chicken embryonic organ development

Poultry Science
C M MaatjensH van den Brand

Abstract

We investigated the effects of an eggshell temperature (EST) of 35.6, 36.7, 37.8, and 38.9°C applied from d of incubation (E) 15, E17, and E19 on hatching pattern and embryonic organ development. A total of 2,850 first-grade eggs of a 43-week-old Ross 308 broiler breeder flock were incubated at an EST of 37.8°C until E15. From E15, E17, or E19 onward, eggs were incubated at an EST of 35.6, 36.7, 37.8, or 38.9°C. Moment of internal pipping (IP), external pipping (EP), and hatch was determined, and organ development was measured at E15, E17, E19, IP, EP, and hatch. A lower EST extended incubation duration compared to a higher EST. The lower incubation duration was mainly caused by the extended time until IP, whereas time between IP and hatch hardly varied between treatments. Relative heart weight was affected by EST already from 2 d after the start of EST treatment on E15, and effects became more pronounced at longer exposure time to various EST treatments. At hatch, the largest difference in relative heart weight was found between an EST of 35.6 and 38.9°C started at E15 (Δ=64.4%). From E17 onward, EST affected yolk-free body mass (YFBM) and relative stomach weight, where a lower EST resulted in a lower YFBM and relative stomach...Continue Reading

References

May 1, 1991·British Poultry Science·S EstebanJ A Tur
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Jan 1, 1972·Advances in Enzyme Regulation·H A Krebs
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Jul 1, 2008·Animal : an International Journal of Animal Bioscience·J E BolhuisW J J Gerrits

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Citations

Jul 7, 2020·PloS One·João Batista Matos JúniorIsabel Cristina Boleli
Aug 1, 2020·Poultry Science·H J WijnenH van den Brand
Jun 24, 2018·Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine·Martin FreesmeyerThomas Winkens

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