Observations on the embryonic development of domestic meat-type guinea fowl (Numida meleagris)

Guinea fowl breeding for meat production is widespread across Europe and the USA. For hatcheries to achieve their output potentials, they need in-depth knowledge about incubation techniques and guinea fowl embryonic development. The aim of this study was to provide updated quantitative data on the d...

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Autores principales:	Alessandro Franzoni, Annelisse Castillo, Claudia Russo, Francesca Cecchi, Achille Schiavone, Margherita Marzoni Fecia di Cossato
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2021
Materias:	body weight embryo development growth curves guinea fowl Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/52e53b7933654980b1fabb06bfe4e872
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spelling	oai:doaj.org-article:52e53b7933654980b1fabb06bfe4e8722021-11-11T14:23:42ZObservations on the embryonic development of domestic meat-type guinea fowl (Numida meleagris)1594-40771828-051X10.1080/1828051X.2021.1993757https://doaj.org/article/52e53b7933654980b1fabb06bfe4e8722021-01-01T00:00:00Zhttp://dx.doi.org/10.1080/1828051X.2021.1993757https://doaj.org/toc/1594-4077https://doaj.org/toc/1828-051XGuinea fowl breeding for meat production is widespread across Europe and the USA. For hatcheries to achieve their output potentials, they need in-depth knowledge about incubation techniques and guinea fowl embryonic development. The aim of this study was to provide updated quantitative data on the developing meat-type strain embryo and to describe its embryonic growth pattern in terms of embryonic weight modelled using Gompertz and logistic functions. Eggs from a 56-week-old genetically controlled flock (Galor S.A.S., Amboise, France) were individually weighed and incubated according to good hatchery practices. 10 embryos were randomly removed every 12 h through to hour 192 of incubation, and thereafter every 24 h. Incubation traits, blastoderm diameter, vitelline circulation diameter, and embryo body weight were recorded, and the mean daily wet embryo-specific mass was calculated. During each session, photographic documentation of the embryos was also obtained, including a general view of the egg content as well as the isolated embryonic body. Embryonic growth curves were estimated using Gompertz and logistic functions, and their parameters are given. High fertility (96%) and hatchability (81%) rates were observed, and the mean keet weight was 32 g at hatch. The accuracy of the curve fit was high for both models. The curves’ inflection points occurred on days 21 and 23 for the logistic and Gompertz models, respectively, demonstrating an embryonic growth pattern typical of a precocial bird species. A photographic chart of the in-ovo chronological development of guinea fowl is provided.HIGHLIGHTS The study follows the incubation and embryonic development of meat-type guinea fowl (Numida meleagris). Daily photographic images and graphical growth models of body weight document the birds’ embryonic development. The results provide effective practical help for hatchery practices by enabling the determination of embryo age.Alessandro FranzoniAnnelisse CastilloClaudia RussoFrancesca CecchiAchille SchiavoneMargherita Marzoni Fecia di CossatoTaylor & Francis Grouparticlebody weightembryo developmentgrowth curvesguinea fowlAnimal cultureSF1-1100ENItalian Journal of Animal Science, Vol 20, Iss 1, Pp 2034-2040 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	body weight embryo development growth curves guinea fowl Animal culture SF1-1100
spellingShingle	body weight embryo development growth curves guinea fowl Animal culture SF1-1100 Alessandro Franzoni Annelisse Castillo Claudia Russo Francesca Cecchi Achille Schiavone Margherita Marzoni Fecia di Cossato Observations on the embryonic development of domestic meat-type guinea fowl (Numida meleagris)
description	Guinea fowl breeding for meat production is widespread across Europe and the USA. For hatcheries to achieve their output potentials, they need in-depth knowledge about incubation techniques and guinea fowl embryonic development. The aim of this study was to provide updated quantitative data on the developing meat-type strain embryo and to describe its embryonic growth pattern in terms of embryonic weight modelled using Gompertz and logistic functions. Eggs from a 56-week-old genetically controlled flock (Galor S.A.S., Amboise, France) were individually weighed and incubated according to good hatchery practices. 10 embryos were randomly removed every 12 h through to hour 192 of incubation, and thereafter every 24 h. Incubation traits, blastoderm diameter, vitelline circulation diameter, and embryo body weight were recorded, and the mean daily wet embryo-specific mass was calculated. During each session, photographic documentation of the embryos was also obtained, including a general view of the egg content as well as the isolated embryonic body. Embryonic growth curves were estimated using Gompertz and logistic functions, and their parameters are given. High fertility (96%) and hatchability (81%) rates were observed, and the mean keet weight was 32 g at hatch. The accuracy of the curve fit was high for both models. The curves’ inflection points occurred on days 21 and 23 for the logistic and Gompertz models, respectively, demonstrating an embryonic growth pattern typical of a precocial bird species. A photographic chart of the in-ovo chronological development of guinea fowl is provided.HIGHLIGHTS The study follows the incubation and embryonic development of meat-type guinea fowl (Numida meleagris). Daily photographic images and graphical growth models of body weight document the birds’ embryonic development. The results provide effective practical help for hatchery practices by enabling the determination of embryo age.
format	article
author	Alessandro Franzoni Annelisse Castillo Claudia Russo Francesca Cecchi Achille Schiavone Margherita Marzoni Fecia di Cossato
author_facet	Alessandro Franzoni Annelisse Castillo Claudia Russo Francesca Cecchi Achille Schiavone Margherita Marzoni Fecia di Cossato
author_sort	Alessandro Franzoni
title	Observations on the embryonic development of domestic meat-type guinea fowl (Numida meleagris)
title_short	Observations on the embryonic development of domestic meat-type guinea fowl (Numida meleagris)
title_full	Observations on the embryonic development of domestic meat-type guinea fowl (Numida meleagris)
title_fullStr	Observations on the embryonic development of domestic meat-type guinea fowl (Numida meleagris)
title_full_unstemmed	Observations on the embryonic development of domestic meat-type guinea fowl (Numida meleagris)
title_sort	observations on the embryonic development of domestic meat-type guinea fowl (numida meleagris)
publisher	Taylor & Francis Group
publishDate	2021
url	https://doaj.org/article/52e53b7933654980b1fabb06bfe4e872
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Observations on the embryonic development of domestic meat-type guinea fowl (Numida meleagris)

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