Resumption of cyclic ovarian activity in postpartum ewes: a review
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/31356 |
Resumo: | The reproduction rate is considered a crucial factor that affects the ability of producers to meet the growing demand for ovines meat, and optimizing this factor will maximize the production rate and increase the efficiency of livestock. A reduction in the length of the postpartum anestrus period results in a shorter interval between lambing and conception and enables more lambs to be produced throughout the life of a ewe. This review discusses the current knowledge of several factors associated with the resumption of cyclic ovarian function in postpartum ewes and how the suckling management of ewes may affect this process. Factors that influence the resumption of cyclic ovarian activity include uterine involution, follicular development, occurrence of silent ovulation and short estrous cycles, breed, reproductive seasonality, nutrition and lactation. Controlled suckling and early weaning are management practices that may be used to obtain three lambings in a 24-month period. In the majority of the studies the interval between lambing and first estrus was reduced when a controlled suckling management strategy was used, therefore the controlled suckling appears to be the best alternative because it has produced good results and is easy to implement. Currently, however, this practice is still not widely used. |
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Resumption of cyclic ovarian activity in postpartum ewes: a reviewRetorno da atividade ovariana cíclica pós-parto de ovelhas: uma revisãoControlled sucklingEarly weaningFollicular developmentSheepAmamentação controladaDesmame precoceDesenvolvimento follicularOvinos de corteThe reproduction rate is considered a crucial factor that affects the ability of producers to meet the growing demand for ovines meat, and optimizing this factor will maximize the production rate and increase the efficiency of livestock. A reduction in the length of the postpartum anestrus period results in a shorter interval between lambing and conception and enables more lambs to be produced throughout the life of a ewe. This review discusses the current knowledge of several factors associated with the resumption of cyclic ovarian function in postpartum ewes and how the suckling management of ewes may affect this process. Factors that influence the resumption of cyclic ovarian activity include uterine involution, follicular development, occurrence of silent ovulation and short estrous cycles, breed, reproductive seasonality, nutrition and lactation. Controlled suckling and early weaning are management practices that may be used to obtain three lambings in a 24-month period. In the majority of the studies the interval between lambing and first estrus was reduced when a controlled suckling management strategy was used, therefore the controlled suckling appears to be the best alternative because it has produced good results and is easy to implement. Currently, however, this practice is still not widely used.A taxa de reprodução é considerado um fator crucial que afeta a capacidade dos produtores em atender a crescente demanda por carne ovina e otimizar esse fator pode maximizar a taxa de produção e aumentar a eficiência da pecuária. A redução da duração do período de anestro pós-parto resulta em um intervalo menor entre a parição e concepção e permite que mais cordeiros sejam produzidos durante toda a vida de uma ovelha. Esta revisão discute o conhecimento atual de vários fatores associados com o retorno da função ovariana cíclica pós-parto em ovelhas e como o regime de amamentação de ovelhas podem afetar esse processo. Fatores que influenciam o retomada da atividade ovariana cíclica incluem involução uterina, o desenvolvimento folicular, a ocorrência de ovulação silênciosa e ciclos estrais curtos, raça, sazonalidade reprodutiva, nutrição e lactação. A amamentação controlada e o desmame precoce são práticas de manejo que podem ser utilizados para se obter três partos em um período de 24 meses. Na maioria dos estudos, o intervalo entre o parto e o primeiro estro foi reduzido quando o manejo de amamentação controlada foi utilizado, portanto, a amamentação controlada parece ser a melhor alternativa, pois tem apresentado bons resultados e sua implementação é fácil. Atualmente, no entanto, essa prática ainda não é amplamente utilizada.Universidade Estadual de Londrina2018-10-11T17:58:42Z2018-10-11T17:58:42Z2016-03info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfASCARI, I. J. et al. Resumption of cyclic ovarian activity in postpartum ewes: a review. Semina: Ciências Agrárias, Londrina, v. 37, n. 2, p. 1101-1116, mar./abr. 2016.http://repositorio.ufla.br/jspui/handle/1/31356Semina: Ciências Agráriasreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessAscari, Ivan JúniorAlves, Nadja GomesAlves, Ana CarolinaGarcia, Iraídes Ferreira FurushoJunqueira, Felipe Barbosaeng2018-10-11T17:58:43Zoai:localhost:1/31356Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2018-10-11T17:58:43Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Resumption of cyclic ovarian activity in postpartum ewes: a review Retorno da atividade ovariana cíclica pós-parto de ovelhas: uma revisão |
title |
Resumption of cyclic ovarian activity in postpartum ewes: a review |
spellingShingle |
Resumption of cyclic ovarian activity in postpartum ewes: a review Ascari, Ivan Júnior Controlled suckling Early weaning Follicular development Sheep Amamentação controlada Desmame precoce Desenvolvimento follicular Ovinos de corte |
title_short |
Resumption of cyclic ovarian activity in postpartum ewes: a review |
title_full |
Resumption of cyclic ovarian activity in postpartum ewes: a review |
title_fullStr |
Resumption of cyclic ovarian activity in postpartum ewes: a review |
title_full_unstemmed |
Resumption of cyclic ovarian activity in postpartum ewes: a review |
title_sort |
Resumption of cyclic ovarian activity in postpartum ewes: a review |
author |
Ascari, Ivan Júnior |
author_facet |
Ascari, Ivan Júnior Alves, Nadja Gomes Alves, Ana Carolina Garcia, Iraídes Ferreira Furusho Junqueira, Felipe Barbosa |
author_role |
author |
author2 |
Alves, Nadja Gomes Alves, Ana Carolina Garcia, Iraídes Ferreira Furusho Junqueira, Felipe Barbosa |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Ascari, Ivan Júnior Alves, Nadja Gomes Alves, Ana Carolina Garcia, Iraídes Ferreira Furusho Junqueira, Felipe Barbosa |
dc.subject.por.fl_str_mv |
Controlled suckling Early weaning Follicular development Sheep Amamentação controlada Desmame precoce Desenvolvimento follicular Ovinos de corte |
topic |
Controlled suckling Early weaning Follicular development Sheep Amamentação controlada Desmame precoce Desenvolvimento follicular Ovinos de corte |
description |
The reproduction rate is considered a crucial factor that affects the ability of producers to meet the growing demand for ovines meat, and optimizing this factor will maximize the production rate and increase the efficiency of livestock. A reduction in the length of the postpartum anestrus period results in a shorter interval between lambing and conception and enables more lambs to be produced throughout the life of a ewe. This review discusses the current knowledge of several factors associated with the resumption of cyclic ovarian function in postpartum ewes and how the suckling management of ewes may affect this process. Factors that influence the resumption of cyclic ovarian activity include uterine involution, follicular development, occurrence of silent ovulation and short estrous cycles, breed, reproductive seasonality, nutrition and lactation. Controlled suckling and early weaning are management practices that may be used to obtain three lambings in a 24-month period. In the majority of the studies the interval between lambing and first estrus was reduced when a controlled suckling management strategy was used, therefore the controlled suckling appears to be the best alternative because it has produced good results and is easy to implement. Currently, however, this practice is still not widely used. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-03 2018-10-11T17:58:42Z 2018-10-11T17:58:42Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
ASCARI, I. J. et al. Resumption of cyclic ovarian activity in postpartum ewes: a review. Semina: Ciências Agrárias, Londrina, v. 37, n. 2, p. 1101-1116, mar./abr. 2016. http://repositorio.ufla.br/jspui/handle/1/31356 |
identifier_str_mv |
ASCARI, I. J. et al. Resumption of cyclic ovarian activity in postpartum ewes: a review. Semina: Ciências Agrárias, Londrina, v. 37, n. 2, p. 1101-1116, mar./abr. 2016. |
url |
http://repositorio.ufla.br/jspui/handle/1/31356 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by-nc/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Estadual de Londrina |
publisher.none.fl_str_mv |
Universidade Estadual de Londrina |
dc.source.none.fl_str_mv |
Semina: Ciências Agrárias reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
_version_ |
1784550034534039552 |