| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
|
Data corrente: |
11/09/2018 |
|
Data da última atualização: |
07/12/2018 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
KAHWAGE, P. R.; ESTEVES, S. N.; JACINTO, M. A. C.; BARIONI JUNIOR, W.; MACHADO, R.; ROMANELLO, N.; PASSERI, L. F.; MENDONÇA, K. L. de; GARCIA, A. R. |
|
Afiliação: |
Priscila Reis Kahwage, UFPA; SERGIO NOVITA ESTEVES, CPPSE; MANUEL ANTONIO CHAGAS JACINTO, CPPSE; WALDOMIRO BARIONI JUNIOR, CPPSE; RUI MACHADO, CPPSE; Narian Romanello, UFPA; Letícia Figueiredo Passeri, UNESP; Karina Laurindo de Mendonça, UFSCAR; ALEXANDRE ROSSETTO GARCIA, CPPSE. |
|
Título: |
Assessment of body and scrotal thermoregulation and semen quality of hair sheep rams throughout the year in a tropical environment. |
|
Ano de publicação: |
2018 |
|
Fonte/Imprenta: |
Small Ruminant Research, v. 160, p. 72-80, 2018. |
|
DOI: |
https://doi.org/10.1016/j.smallrumres.2018.01.015 |
|
Idioma: |
Inglês |
|
Conteúdo: |
The present study was carried out to assess the capacity of Morada Nova (MON) and Santa Inês (SIN) hair sheep breeds to maintain homeothermy and its relation with semen quality in a tropical climate. Sixteen rams (MON=7 and SIN=9) were assessed for 12 months. During summer and spring, the Temperature-Humidity Index values surpassed the level indicative of thermal stress, and sweating, respiratory and heart rates increased (P < .05). Those responses allowed animals to dissipate heat, maintain rectal temperature in the physiological range and efficiently avoid thermal stress. Scrotal temperatures rose during summer and spring, but, unlike what occurs in wool breeds of sheep, the thermal gradient between poles of testis increased, which shows efficient compensatory scrotal thermoregulation in both breeds herein studied. Semen quality parameters remained within normal ranges. The high correlation observed between rectal and spermatic funicle temperature gradients with sperm membrane integrity (r=0.62; P < .05) confirmed the importance of systemic and gonadal thermoregulation for the production of ejaculates with highest possible proportion of viable spermatozoa. Thus, MON and SIN rams can be considered resilient to tropical climate since they efficiently perform the thermolysis to face thermal challenges with no negative impact on semen quality throughout the year. Those adaptability characteristics are highly desirable in the genotypes proposed for use in production systems in tropical environments. MenosThe present study was carried out to assess the capacity of Morada Nova (MON) and Santa Inês (SIN) hair sheep breeds to maintain homeothermy and its relation with semen quality in a tropical climate. Sixteen rams (MON=7 and SIN=9) were assessed for 12 months. During summer and spring, the Temperature-Humidity Index values surpassed the level indicative of thermal stress, and sweating, respiratory and heart rates increased (P < .05). Those responses allowed animals to dissipate heat, maintain rectal temperature in the physiological range and efficiently avoid thermal stress. Scrotal temperatures rose during summer and spring, but, unlike what occurs in wool breeds of sheep, the thermal gradient between poles of testis increased, which shows efficient compensatory scrotal thermoregulation in both breeds herein studied. Semen quality parameters remained within normal ranges. The high correlation observed between rectal and spermatic funicle temperature gradients with sperm membrane integrity (r=0.62; P < .05) confirmed the importance of systemic and gonadal thermoregulation for the production of ejaculates with highest possible proportion of viable spermatozoa. Thus, MON and SIN rams can be considered resilient to tropical climate since they efficiently perform the thermolysis to face thermal challenges with no negative impact on semen quality throughout the year. Those adaptability characteristics are highly desirable in the genotypes proposed for use in production systems in ... Mostrar Tudo |
|
Palavras-Chave: |
Adaptability; Sperm; Thermal comfort; Tropical climate. |
|
Thesagro: |
Clima Tropical; Esperma; Ovis Aries. |
|
Thesaurus Nal: |
Sheep. |
|
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
|
Marc: |
null
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 4 | |
| 4. |  | FLORES, C. A.; GUERRA, C. C.; MANDELLI, F.; FALCADE, I.; TONIETTO, J.; SALTON, M. A.; ZANUS, M. C. Desenvolvimento de uma Indicação Geográfica para vinhos de Pinto Bandeira, Serra Gaúcha, RS. In: CONGRESSO LATINO-AMERICANO DE VITICULTURA E ENOLOGIA, 10.; CONGRESSO BRASILEIRO DE VITICULTURA E ENOLOGIA, 11.; SEMINÁRIO FRANCO-BRASILEIRO DE VITICULTURA E ENOLOGIA, 2., 2005, Bento Gonçalves. Anais... Bento Gonçalves: Embrapa Uva e Vinho, 2005. p. 362.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Uva e Vinho. |
|    |
| Registros recuperados : 4 | |
|
| Expressão de busca inválida. Verifique!!! |
|
|
