Puberty in breeds of female hair sheep in Northeast Brazil

Detalhes bibliográficos
Autor(a) principal: Simplício, Aurino Alves
Data de Publicação: 2014
Outros Autores: Figueiredo, Elsio Antonio P. de, Riera, Gerardo Simon, Foote, Warren Cristopher
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/16458
Resumo: This experiment was carried out with 112 ewe lambs, 32 of Morada Nova breed (MN), 63 Brazilian Somali (BS), and 17 Santa Inês (SI); grazing in native pasture at the Brazilian National Goat Research Center, CNPC, Sobral, CE, Northeast Brazil (3° 42' south latitude and 40° 21' west longitude). Lambs were weaned in groups averaging 112 days of age. Live body weights were recorded at birth and at four-week intervals until the first puberal estrus. Estrus was detected by using Leaser rams. The date, time of day and live body weights were recorded to obtain the age and weight at first puberal estrus. Between 40 to 60 hours after estrus was detected, the ovaries of each ewe lamb were observed by laparotomy to determine the occurrence and rate of prepuberal (CA) and puberal (CL) ovulations. The overall mean age and weight at puberty were 306.3 ± 5.6 days and 20.7 ± 0.3 kg, respectively. The SI breed (24.0 ± 1.0 kg) was statistically (P < 0.05) heavier at puberty than the MN (21.2±0.6 kg) and BS (19.7±0.4 kg) breeds. No statistical differences were found (P > 0.05) among breeds for age at puberty. There was no statistical difference (P> 0.05) for weight or age at puberty due to type of birth. A significant (P < 0.05) influence of year on weight and age at puberty was found. No differences (P > 0.05) were found among breeds for incidence and rate of ovulation. All ewe lambs ovulated at puberal estrus with a mean ovulation rate of 1.31. During prepuberal period, 78.35% of the ewe lambs ovulated with an ovulation rate of 1.13.
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spelling Puberty in breeds of female hair sheep in Northeast BrazilPuberdade em fêmeas de raças ovinas deslanadas no Nordeste do Brasilreproduction; ewe lambs; ovulation; native pasturereprodução; borregas; ovulação; pastagem nativaThis experiment was carried out with 112 ewe lambs, 32 of Morada Nova breed (MN), 63 Brazilian Somali (BS), and 17 Santa Inês (SI); grazing in native pasture at the Brazilian National Goat Research Center, CNPC, Sobral, CE, Northeast Brazil (3° 42' south latitude and 40° 21' west longitude). Lambs were weaned in groups averaging 112 days of age. Live body weights were recorded at birth and at four-week intervals until the first puberal estrus. Estrus was detected by using Leaser rams. The date, time of day and live body weights were recorded to obtain the age and weight at first puberal estrus. Between 40 to 60 hours after estrus was detected, the ovaries of each ewe lamb were observed by laparotomy to determine the occurrence and rate of prepuberal (CA) and puberal (CL) ovulations. The overall mean age and weight at puberty were 306.3 ± 5.6 days and 20.7 ± 0.3 kg, respectively. The SI breed (24.0 ± 1.0 kg) was statistically (P < 0.05) heavier at puberty than the MN (21.2±0.6 kg) and BS (19.7±0.4 kg) breeds. No statistical differences were found (P > 0.05) among breeds for age at puberty. There was no statistical difference (P> 0.05) for weight or age at puberty due to type of birth. A significant (P < 0.05) influence of year on weight and age at puberty was found. No differences (P > 0.05) were found among breeds for incidence and rate of ovulation. All ewe lambs ovulated at puberal estrus with a mean ovulation rate of 1.31. During prepuberal period, 78.35% of the ewe lambs ovulated with an ovulation rate of 1.13.Analisou-se o desempenho de 112 borregas Morada Nova (32), Somalis Brasileira (63) e Santa Inês (17), mantidas em pastagem nativa, no Centro Nacional de Pesquisa de Caprinos (CNPC), em Sobral, CE, Nordeste do Brasil (latitude 3° 42' Sul e longitude em 40° 21' Oeste). Desmamadas a idade média de 112 dias, foram pesadas ao nascer e a cada 28 dias, até à puberdade e observadas com vistas à detecção da ocorrência de estro, durante duas vezes ao dia, com auxílio de rufiões. Entre 40 e 60 horas após a borrega ser identificada em estro, era submetida à laparotomia, como objetivo de se avaliar a função ovariana quanto à ocorrência e à taxa de ovulação nos períodos pré-puberal e puberal. A idade e o peso médio à puberdade foram de 306,3 ± 5,6 dias e de 20,7 ± 0,3 kg, respectivamente. A raça Santa Inês (24,0 ± 1,0 kg) foi estatisticamente mais pesada (P < 0,05) do que a Morada Nova (21,2 ± 0,6 kg) e a Somalis Brasileira (19,7 ± 0,4 kg), porém as duas últimas não diferiram entre si. Não houve efeito de raça sobre a idade à puberdade, nem efeito do tipo de parto sobre peso ou idade (P > 0,05), porém observou-se efeito de ano (P < 0,05) sobre peso e idade à puberdade. Todas as borregas ovularam à puberdade, apresentando taxa de ovulação média de 1,31. Não houve diferença estatística (P > 0,05) entre raças. Durante o período pré-puberal, 78,35% das borregas ovularam com uma taxa de 1,13.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraSimplício, Aurino AlvesFigueiredo, Elsio Antonio P. deRiera, Gerardo SimonFoote, Warren Cristopher2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/16458Pesquisa Agropecuaria Brasileira; v.24, n.10, out. 1989; 1249-1253Pesquisa Agropecuária Brasileira; v.24, n.10, out. 1989; 1249-12531678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://seer.sct.embrapa.br/index.php/pab/article/view/16458/10723info:eu-repo/semantics/openAccess2014-08-29T17:15:25Zoai:ojs.seer.sct.embrapa.br:article/16458Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-08-29T17:15:25Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Puberty in breeds of female hair sheep in Northeast Brazil
Puberdade em fêmeas de raças ovinas deslanadas no Nordeste do Brasil
title Puberty in breeds of female hair sheep in Northeast Brazil
spellingShingle Puberty in breeds of female hair sheep in Northeast Brazil
Simplício, Aurino Alves
reproduction; ewe lambs; ovulation; native pasture
reprodução; borregas; ovulação; pastagem nativa
title_short Puberty in breeds of female hair sheep in Northeast Brazil
title_full Puberty in breeds of female hair sheep in Northeast Brazil
title_fullStr Puberty in breeds of female hair sheep in Northeast Brazil
title_full_unstemmed Puberty in breeds of female hair sheep in Northeast Brazil
title_sort Puberty in breeds of female hair sheep in Northeast Brazil
author Simplício, Aurino Alves
author_facet Simplício, Aurino Alves
Figueiredo, Elsio Antonio P. de
Riera, Gerardo Simon
Foote, Warren Cristopher
author_role author
author2 Figueiredo, Elsio Antonio P. de
Riera, Gerardo Simon
Foote, Warren Cristopher
author2_role author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Simplício, Aurino Alves
Figueiredo, Elsio Antonio P. de
Riera, Gerardo Simon
Foote, Warren Cristopher
dc.subject.por.fl_str_mv reproduction; ewe lambs; ovulation; native pasture
reprodução; borregas; ovulação; pastagem nativa
topic reproduction; ewe lambs; ovulation; native pasture
reprodução; borregas; ovulação; pastagem nativa
description This experiment was carried out with 112 ewe lambs, 32 of Morada Nova breed (MN), 63 Brazilian Somali (BS), and 17 Santa Inês (SI); grazing in native pasture at the Brazilian National Goat Research Center, CNPC, Sobral, CE, Northeast Brazil (3° 42' south latitude and 40° 21' west longitude). Lambs were weaned in groups averaging 112 days of age. Live body weights were recorded at birth and at four-week intervals until the first puberal estrus. Estrus was detected by using Leaser rams. The date, time of day and live body weights were recorded to obtain the age and weight at first puberal estrus. Between 40 to 60 hours after estrus was detected, the ovaries of each ewe lamb were observed by laparotomy to determine the occurrence and rate of prepuberal (CA) and puberal (CL) ovulations. The overall mean age and weight at puberty were 306.3 ± 5.6 days and 20.7 ± 0.3 kg, respectively. The SI breed (24.0 ± 1.0 kg) was statistically (P < 0.05) heavier at puberty than the MN (21.2±0.6 kg) and BS (19.7±0.4 kg) breeds. No statistical differences were found (P > 0.05) among breeds for age at puberty. There was no statistical difference (P> 0.05) for weight or age at puberty due to type of birth. A significant (P < 0.05) influence of year on weight and age at puberty was found. No differences (P > 0.05) were found among breeds for incidence and rate of ovulation. All ewe lambs ovulated at puberal estrus with a mean ovulation rate of 1.31. During prepuberal period, 78.35% of the ewe lambs ovulated with an ovulation rate of 1.13.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-17
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/16458
url https://seer.sct.embrapa.br/index.php/pab/article/view/16458
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/16458/10723
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.24, n.10, out. 1989; 1249-1253
Pesquisa Agropecuária Brasileira; v.24, n.10, out. 1989; 1249-1253
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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