Growth modeling of castrated Brahman males raised in tropical conditions and born in different seasons

In this paper, parameters that describe growth, as a function of the season in which they were born (dry or rainy), are presented for males of the for males of the Brahman breed that were castrated at birth and raised in their native environment in the intense system of the Llano Venezolano. Data ar...

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Autores principales:	Miguel,José A, Melendez,Sandy J, Asenjo,Begoña, Bonilla,Luis M, Ciria,Jesús
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2012
Materias:	Bertalanffy model Brahman cattle Brody model Gompertz model growth curves logistic model Richards model
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000200004
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spelling	oai:scielo:S0718-162020120002000042012-10-24Growth modeling of castrated Brahman males raised in tropical conditions and born in different seasonsMiguel,José AMelendez,Sandy JAsenjo,BegoñaBonilla,Luis MCiria,Jesús Bertalanffy model Brahman cattle Brody model Gompertz model growth curves logistic model Richards model In this paper, parameters that describe growth, as a function of the season in which they were born (dry or rainy), are presented for males of the for males of the Brahman breed that were castrated at birth and raised in their native environment in the intense system of the Llano Venezolano. Data are presented for 1,478 Brahman males that were castrated at birth. Of these, 750 were born in the months of June and July (the rainy season) and 728 were born in January and February (the dry season). The animals born during the dry season were heavier up until the beginning of the fattening period; after weaning, the greatest average daily weight gain coincided in both groups during rainy periods when the pasture production was greater. When comparing the observed weights with the estimates, the Brody model was better at estimating the actual weight of the animals at birth, weaning and maturity in both seasons of birth. The Gompertz, Bertalanffy, Richards and Logistic models overestimated the weights of the animals at birth and at the end of the fattening period; however, they underestimated the weights at weaning and maturity for both birth seasons. Regarding the birth season, no differences were found in the estimated maturation rate for any of the models, although there were differences among the models for the same season of birth.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.39 n.2 20122012-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000200004en10.4067/S0718-16202012000200004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Bertalanffy model Brahman cattle Brody model Gompertz model growth curves logistic model Richards model
spellingShingle	Bertalanffy model Brahman cattle Brody model Gompertz model growth curves logistic model Richards model Miguel,José A Melendez,Sandy J Asenjo,Begoña Bonilla,Luis M Ciria,Jesús Growth modeling of castrated Brahman males raised in tropical conditions and born in different seasons
description	In this paper, parameters that describe growth, as a function of the season in which they were born (dry or rainy), are presented for males of the for males of the Brahman breed that were castrated at birth and raised in their native environment in the intense system of the Llano Venezolano. Data are presented for 1,478 Brahman males that were castrated at birth. Of these, 750 were born in the months of June and July (the rainy season) and 728 were born in January and February (the dry season). The animals born during the dry season were heavier up until the beginning of the fattening period; after weaning, the greatest average daily weight gain coincided in both groups during rainy periods when the pasture production was greater. When comparing the observed weights with the estimates, the Brody model was better at estimating the actual weight of the animals at birth, weaning and maturity in both seasons of birth. The Gompertz, Bertalanffy, Richards and Logistic models overestimated the weights of the animals at birth and at the end of the fattening period; however, they underestimated the weights at weaning and maturity for both birth seasons. Regarding the birth season, no differences were found in the estimated maturation rate for any of the models, although there were differences among the models for the same season of birth.
author	Miguel,José A Melendez,Sandy J Asenjo,Begoña Bonilla,Luis M Ciria,Jesús
author_facet	Miguel,José A Melendez,Sandy J Asenjo,Begoña Bonilla,Luis M Ciria,Jesús
author_sort	Miguel,José A
title	Growth modeling of castrated Brahman males raised in tropical conditions and born in different seasons
title_short	Growth modeling of castrated Brahman males raised in tropical conditions and born in different seasons
title_full	Growth modeling of castrated Brahman males raised in tropical conditions and born in different seasons
title_fullStr	Growth modeling of castrated Brahman males raised in tropical conditions and born in different seasons
title_full_unstemmed	Growth modeling of castrated Brahman males raised in tropical conditions and born in different seasons
title_sort	growth modeling of castrated brahman males raised in tropical conditions and born in different seasons
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000200004
work_keys_str_mv	AT migueljosea growthmodelingofcastratedbrahmanmalesraisedintropicalconditionsandbornindifferentseasons AT melendezsandyj growthmodelingofcastratedbrahmanmalesraisedintropicalconditionsandbornindifferentseasons AT asenjobegona growthmodelingofcastratedbrahmanmalesraisedintropicalconditionsandbornindifferentseasons AT bonillaluism growthmodelingofcastratedbrahmanmalesraisedintropicalconditionsandbornindifferentseasons AT ciriajesus growthmodelingofcastratedbrahmanmalesraisedintropicalconditionsandbornindifferentseasons
_version_	1714202139627094016

Growth modeling of castrated Brahman males raised in tropical conditions and born in different seasons

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