Linear and non-linear regression model fitting of testicular three-dimensional growth in Miranda donkeys

In endangered donkey populations, reproductive performance is one the most important areas to study, provided its connection with conservation opportunities. Among reproductive traits, testicular dimensions, their relationship with body weight and seminal qualitative and quantitative parameters is p...

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Autores principales:	Ana Martins-Bessa, Miguel Quaresma, Belén Leiva, Ana Calado, Ander Arando, Carmen Marín, Francisco Javier Navas
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2021
Materias:	donkeys akaike information criterion body weight testicular dimensions predictive models bayesian information criterion Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/a59fb418edee4c5fa08b946efefd48b5
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spelling	oai:doaj.org-article:a59fb418edee4c5fa08b946efefd48b52021-11-11T14:23:42ZLinear and non-linear regression model fitting of testicular three-dimensional growth in Miranda donkeys1594-40771828-051X10.1080/1828051X.2021.1965046https://doaj.org/article/a59fb418edee4c5fa08b946efefd48b52021-01-01T00:00:00Zhttp://dx.doi.org/10.1080/1828051X.2021.1965046https://doaj.org/toc/1594-4077https://doaj.org/toc/1828-051XIn endangered donkey populations, reproductive performance is one the most important areas to study, provided its connection with conservation opportunities. Among reproductive traits, testicular dimensions, their relationship with body weight and seminal qualitative and quantitative parameters is particularly notable. The aim of the present study was to model the evolution of body weight, testicular length, width and height, volume and gonadosomatic index in Miranda donkeys using in vivo ultrasonography. Data on the aforementioned variables of 23 Miranda donkeys, from 4 to 259 months of age, were fitted to eleven linear and nonlinear models. Cubic function modelling reported the best-fitting properties for almost all variables, except for body weight (sigmoid curve model). Cubic model presented a higher ability to capture interindividual variability (Adj. R2 from 0.795 to 0.922) for testicular height, width, length and volume measurements than the rest of fucntions tested. Bayesian information criterion (BIC) values suggest in vivo ultrasonography may be a rather efficient and accurate tool when predicting for the evolution of testicular volume or gonadosomatic index than three-dimensional testicular measurements.Highlights Cubic functions efficiently model testicular dimensions, volume and composite indices evolution. Ultrasonography objectively, accurately and reproducibly determines testicular volume. Testicular asymmetry physiologically occurs to balance bilateral testicular activity.Ana Martins-BessaMiguel QuaresmaBelén LeivaAna CaladoAnder ArandoCarmen MarínFrancisco Javier NavasTaylor & Francis Grouparticledonkeysakaike information criterionbody weighttesticular dimensions predictive modelsbayesian information criterionAnimal cultureSF1-1100ENItalian Journal of Animal Science, Vol 20, Iss 1, Pp 1518-1531 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	donkeys akaike information criterion body weight testicular dimensions predictive models bayesian information criterion Animal culture SF1-1100
spellingShingle	donkeys akaike information criterion body weight testicular dimensions predictive models bayesian information criterion Animal culture SF1-1100 Ana Martins-Bessa Miguel Quaresma Belén Leiva Ana Calado Ander Arando Carmen Marín Francisco Javier Navas Linear and non-linear regression model fitting of testicular three-dimensional growth in Miranda donkeys
description	In endangered donkey populations, reproductive performance is one the most important areas to study, provided its connection with conservation opportunities. Among reproductive traits, testicular dimensions, their relationship with body weight and seminal qualitative and quantitative parameters is particularly notable. The aim of the present study was to model the evolution of body weight, testicular length, width and height, volume and gonadosomatic index in Miranda donkeys using in vivo ultrasonography. Data on the aforementioned variables of 23 Miranda donkeys, from 4 to 259 months of age, were fitted to eleven linear and nonlinear models. Cubic function modelling reported the best-fitting properties for almost all variables, except for body weight (sigmoid curve model). Cubic model presented a higher ability to capture interindividual variability (Adj. R2 from 0.795 to 0.922) for testicular height, width, length and volume measurements than the rest of fucntions tested. Bayesian information criterion (BIC) values suggest in vivo ultrasonography may be a rather efficient and accurate tool when predicting for the evolution of testicular volume or gonadosomatic index than three-dimensional testicular measurements.Highlights Cubic functions efficiently model testicular dimensions, volume and composite indices evolution. Ultrasonography objectively, accurately and reproducibly determines testicular volume. Testicular asymmetry physiologically occurs to balance bilateral testicular activity.
format	article
author	Ana Martins-Bessa Miguel Quaresma Belén Leiva Ana Calado Ander Arando Carmen Marín Francisco Javier Navas
author_facet	Ana Martins-Bessa Miguel Quaresma Belén Leiva Ana Calado Ander Arando Carmen Marín Francisco Javier Navas
author_sort	Ana Martins-Bessa
title	Linear and non-linear regression model fitting of testicular three-dimensional growth in Miranda donkeys
title_short	Linear and non-linear regression model fitting of testicular three-dimensional growth in Miranda donkeys
title_full	Linear and non-linear regression model fitting of testicular three-dimensional growth in Miranda donkeys
title_fullStr	Linear and non-linear regression model fitting of testicular three-dimensional growth in Miranda donkeys
title_full_unstemmed	Linear and non-linear regression model fitting of testicular three-dimensional growth in Miranda donkeys
title_sort	linear and non-linear regression model fitting of testicular three-dimensional growth in miranda donkeys
publisher	Taylor & Francis Group
publishDate	2021
url	https://doaj.org/article/a59fb418edee4c5fa08b946efefd48b5
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Linear and non-linear regression model fitting of testicular three-dimensional growth in Miranda donkeys

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