Comparison of non-linear growth models to describe the growth curve in West African Dwarf sheep

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dc.contributor.authorGbangboche, A. B.
dc.contributor.authorGlele-Kakai, R.
dc.contributor.authorSalifou, S.
dc.contributor.authorAlbuquerque, Lucia Galvão de [UNESP]
dc.contributor.authorLeroy, P. L.
dc.contributor.institutionUniv Abomey Calavi
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Liege
dc.date.accessioned2014-05-20T13:19:10Z
dc.date.available2014-05-20T13:19:10Z
dc.date.issued2008-07-01
dc.description.abstractThe objectives of this study were to compare the goodness of fit of four non-linear growth models, i.e. Brody, Gompertz, Logistic and Von Bertalanffy, in West African Dwarf (WAD) sheep. A total of 5274 monthly weight records from birth up to 180 days of age from 889 lambs, collected during 2001 to 2004 in Betecoucou breeding farm in Benin were used. In the preliminary analysis, the General Linear Model Procedure of the Statistical Analysis Systems Institute was applied to the dataset to identify the significant effects of the sex of lamb (male and female), type of birth (single and twin), season of birth (rainy season and dry season), parity of dam (1, 2 and 3) and year of birth (2001, 2002, 2003 and 2004) on the observed birth weight and monthly weight up to 6 months of age. The models parameters (A, B and k), coefficient of determination (112), mean square error (MSE) were calculated using language of technical computing package Matlab(R), 2006. The mean values of A, B and k were substituted into each model to calculate the corresponding Akaike's Information Criterion (AIC). Among the four growth functions, the Brody model has been selected for its accuracy of fit according to the higher R(2), lower MSE and A/C Finally, the parameters A, B and k were adjusted in Matlab(R) 2006 for the sex of lamb, year of birth, season of birth, birth type and the parity of ewe, providing a specific slope of the Brody growth curve. The results of this study suggest that Brody model can be useful for WAD sheep breeding in Betecoucou farm conditions through growth monitoring.en
dc.description.affiliationUniv Abomey Calavi, Fac Sci Agron, Cotonou 01BP526, Benin
dc.description.affiliationUniv Abomey Calavi, Ecole Polytech Abomey Calavi, Lab Rech Biol Appl LARBA, Cotonou 01BP2009, Benin
dc.description.affiliationUniv Estadual Paulista, Fac Ciencias Agrarias & Vet, Dept Zootecnia, UNESP, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationUniv Liege, Fac Med Vet, Dept Anim Prod, B-4000 Liege, Belgium
dc.description.affiliationUnespUniv Estadual Paulista, Fac Ciencias Agrarias & Vet, Dept Zootecnia, UNESP, BR-14884900 Jaboticabal, SP, Brazil
dc.format.extent1003-1012
dc.identifierhttp://dx.doi.org/10.1017/S1751731108002206
dc.identifier.citationAnimal. Cambridge: Cambridge Univ Press, v. 2, n. 7, p. 1003-1012, 2008.
dc.identifier.doi10.1017/S1751731108002206
dc.identifier.fileWOS000257149700005.pdf
dc.identifier.issn1751-7311
dc.identifier.lattes5866981114947883
dc.identifier.urihttp://hdl.handle.net/11449/4946
dc.identifier.wosWOS:000257149700005
dc.language.isoeng
dc.publisherCambridge University Press
dc.relation.ispartofAnimal
dc.relation.ispartofjcr1.870
dc.relation.ispartofsjr0,842
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectbiological traitsen
dc.subjectNonlinear modelsen
dc.subjectWest African Dwarf sheepen
dc.subjectBeninen
dc.titleComparison of non-linear growth models to describe the growth curve in West African Dwarf sheepen
dc.typeArtigo
dcterms.licensehttp://journals.cambridge.org/action/displaySpecialPage?pageId=4676#
dcterms.rightsHolderCambridge Univ Press
unesp.author.lattes5866981114947883
unesp.author.orcid0000-0002-2030-7590[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt
unesp.departmentZootecnia - FCAVpt

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Jaboticabal - FCAV - Faculdade de Ciências Agrárias e Veterinárias