Puberty in breeds of female hair sheep in Northeast Brazil
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
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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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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1793416666424541184 |