Influence of feeding differentiation on the age at onset of puberty in Brazilian Bergamasca dairy ewe lambs

Detalhes bibliográficos
Autor(a) principal: Dantas,A.
Data de Publicação: 2016
Outros Autores: Siqueira,E.R., Fernandes,S., Oba,E., Castilho,A.M., Meirelles,P.R.L., Sartori,M.M.P., Santos,P.T.R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Arquivo brasileiro de medicina veterinária e zootecnia (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000100022
Resumo: The objective of the study was to evaluate body growth and age at onset of puberty on lambs fed two specific diets for low and high growth rates. A herd of 20 Brazilian Bergamasca lambs was divided in two groups (n= 10) and kept confined throughout the experimental period, two animals of the same treatment/pen. Two phases were established: Phase 1, from 90 days of age until the onset of puberty; and Phase 2, from puberty onset up to 1 year old. For Phase 1, two distinct diets were formulated, being: Treatment A, which was formulated to obtain an average daily gain of approximately 150g; and Treatment B, for an average daily gain of about 250g. In Phase 2, a balanced, equal diet was provided to both groups. Every 14 days, the animals were weighed and given average daily gain, average daily dry matter intake and body condition score. From the 5th month of age on, in each group, a vasectomized male was used to detect estrus, establishing age at puberty onset and estrus interval for each lamb. Blood samples were collected every 28 days to determine plasma growth hormone concentration. Treatment B lambs gained more weight and had higher body condition score (P<0.05) and there was no difference for age at puberty onset and plasma growth hormone levels (P>0.05) between treatments. It was found that both treatments showed satisfactory performances. Thus, treatment A may be indicated as a reasonable feeding system to achieve positive responses on confined ewe lambs during growth phase.
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spelling Influence of feeding differentiation on the age at onset of puberty in Brazilian Bergamasca dairy ewe lambsnutritionperformancereproductiongrowth hormonesheepThe objective of the study was to evaluate body growth and age at onset of puberty on lambs fed two specific diets for low and high growth rates. A herd of 20 Brazilian Bergamasca lambs was divided in two groups (n= 10) and kept confined throughout the experimental period, two animals of the same treatment/pen. Two phases were established: Phase 1, from 90 days of age until the onset of puberty; and Phase 2, from puberty onset up to 1 year old. For Phase 1, two distinct diets were formulated, being: Treatment A, which was formulated to obtain an average daily gain of approximately 150g; and Treatment B, for an average daily gain of about 250g. In Phase 2, a balanced, equal diet was provided to both groups. Every 14 days, the animals were weighed and given average daily gain, average daily dry matter intake and body condition score. From the 5th month of age on, in each group, a vasectomized male was used to detect estrus, establishing age at puberty onset and estrus interval for each lamb. Blood samples were collected every 28 days to determine plasma growth hormone concentration. Treatment B lambs gained more weight and had higher body condition score (P<0.05) and there was no difference for age at puberty onset and plasma growth hormone levels (P>0.05) between treatments. It was found that both treatments showed satisfactory performances. Thus, treatment A may be indicated as a reasonable feeding system to achieve positive responses on confined ewe lambs during growth phase.Universidade Federal de Minas Gerais, Escola de Veterinária2016-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000100022Arquivo Brasileiro de Medicina Veterinária e Zootecnia v.68 n.1 2016reponame:Arquivo brasileiro de medicina veterinária e zootecnia (Online)instname:Universidade Federal de Minas Gerais (UFMG)instacron:UFMG10.1590/1678-4162-8278info:eu-repo/semantics/openAccessDantas,A.Siqueira,E.R.Fernandes,S.Oba,E.Castilho,A.M.Meirelles,P.R.L.Sartori,M.M.P.Santos,P.T.R.eng2016-01-27T00:00:00Zoai:scielo:S0102-09352016000100022Revistahttps://www.scielo.br/j/abmvz/PUBhttps://old.scielo.br/oai/scielo-oai.phpjournal@vet.ufmg.br||abmvz.artigo@abmvz.org.br1678-41620102-0935opendoar:2016-01-27T00:00Arquivo brasileiro de medicina veterinária e zootecnia (Online) - Universidade Federal de Minas Gerais (UFMG)false
dc.title.none.fl_str_mv Influence of feeding differentiation on the age at onset of puberty in Brazilian Bergamasca dairy ewe lambs
title Influence of feeding differentiation on the age at onset of puberty in Brazilian Bergamasca dairy ewe lambs
spellingShingle Influence of feeding differentiation on the age at onset of puberty in Brazilian Bergamasca dairy ewe lambs
Dantas,A.
nutrition
performance
reproduction
growth hormone
sheep
title_short Influence of feeding differentiation on the age at onset of puberty in Brazilian Bergamasca dairy ewe lambs
title_full Influence of feeding differentiation on the age at onset of puberty in Brazilian Bergamasca dairy ewe lambs
title_fullStr Influence of feeding differentiation on the age at onset of puberty in Brazilian Bergamasca dairy ewe lambs
title_full_unstemmed Influence of feeding differentiation on the age at onset of puberty in Brazilian Bergamasca dairy ewe lambs
title_sort Influence of feeding differentiation on the age at onset of puberty in Brazilian Bergamasca dairy ewe lambs
author Dantas,A.
author_facet Dantas,A.
Siqueira,E.R.
Fernandes,S.
Oba,E.
Castilho,A.M.
Meirelles,P.R.L.
Sartori,M.M.P.
Santos,P.T.R.
author_role author
author2 Siqueira,E.R.
Fernandes,S.
Oba,E.
Castilho,A.M.
Meirelles,P.R.L.
Sartori,M.M.P.
Santos,P.T.R.
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Dantas,A.
Siqueira,E.R.
Fernandes,S.
Oba,E.
Castilho,A.M.
Meirelles,P.R.L.
Sartori,M.M.P.
Santos,P.T.R.
dc.subject.por.fl_str_mv nutrition
performance
reproduction
growth hormone
sheep
topic nutrition
performance
reproduction
growth hormone
sheep
description The objective of the study was to evaluate body growth and age at onset of puberty on lambs fed two specific diets for low and high growth rates. A herd of 20 Brazilian Bergamasca lambs was divided in two groups (n= 10) and kept confined throughout the experimental period, two animals of the same treatment/pen. Two phases were established: Phase 1, from 90 days of age until the onset of puberty; and Phase 2, from puberty onset up to 1 year old. For Phase 1, two distinct diets were formulated, being: Treatment A, which was formulated to obtain an average daily gain of approximately 150g; and Treatment B, for an average daily gain of about 250g. In Phase 2, a balanced, equal diet was provided to both groups. Every 14 days, the animals were weighed and given average daily gain, average daily dry matter intake and body condition score. From the 5th month of age on, in each group, a vasectomized male was used to detect estrus, establishing age at puberty onset and estrus interval for each lamb. Blood samples were collected every 28 days to determine plasma growth hormone concentration. Treatment B lambs gained more weight and had higher body condition score (P<0.05) and there was no difference for age at puberty onset and plasma growth hormone levels (P>0.05) between treatments. It was found that both treatments showed satisfactory performances. Thus, treatment A may be indicated as a reasonable feeding system to achieve positive responses on confined ewe lambs during growth phase.
publishDate 2016
dc.date.none.fl_str_mv 2016-02-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000100022
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000100022
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1678-4162-8278
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Universidade Federal de Minas Gerais, Escola de Veterinária
publisher.none.fl_str_mv Universidade Federal de Minas Gerais, Escola de Veterinária
dc.source.none.fl_str_mv Arquivo Brasileiro de Medicina Veterinária e Zootecnia v.68 n.1 2016
reponame:Arquivo brasileiro de medicina veterinária e zootecnia (Online)
instname:Universidade Federal de Minas Gerais (UFMG)
instacron:UFMG
instname_str Universidade Federal de Minas Gerais (UFMG)
instacron_str UFMG
institution UFMG
reponame_str Arquivo brasileiro de medicina veterinária e zootecnia (Online)
collection Arquivo brasileiro de medicina veterinária e zootecnia (Online)
repository.name.fl_str_mv Arquivo brasileiro de medicina veterinária e zootecnia (Online) - Universidade Federal de Minas Gerais (UFMG)
repository.mail.fl_str_mv journal@vet.ufmg.br||abmvz.artigo@abmvz.org.br
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