|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
01/08/1992 |
Data da última atualização: |
31/03/2023 |
Autoria: |
SMITH, J. F. |
Título: |
The effect of temperature on characteristics of semen of rams. |
Ano de publicação: |
1971 |
Fonte/Imprenta: |
Australian Journal of Agricultural Research, v. 22, n. 3, p. 481-490, 1971. |
Idioma: |
Inglês |
Conteúdo: |
Abstract: The effect on a number of semen characteristics of exposure to four periods (4, 6, 9, and 13.5 hr) of high temperature (41¦C) was studied in nine rams. Individual rams varied in their susceptibility to seminal degeneration, and repeatability within rains at successive heat treatments was low. There were significant linear effects of duration of heat treatment on volume, density, number of spermatozoa per ejaculate, percentage of abnormal spermatozoa, motility, fructose concentration, and reaction time. There was a significant effect of week of collection after treatment on all characteristics. The major component of this effect was quadratic, showing a degeneration and recovery pattern. Evidence of degeneration appeared at approximately the 12th day and reached its maximum at the 19th day, after which recovery was shown up to the 30th day. This pattern was observed in most of the characteristics studied. There was a significant negative correlation (r = -0.593 ; P < 0.01) between a mean semen composite score and the maximum subcutaneous scrotal temperature recorded during the corresponding heat treatment period. Correlations between mean semen composite score and the increase in scrotal temperature (r = -0.22) and the minimum difference between body and scrotal temperature (r = +0.33) were not significant. Thus, the maximum subcutaneous scrotal temperature appears the important factor involved in seminal degeneration following exposure to high temperature. |
Palavras-Chave: |
Seminal degeneration. |
Thesagro: |
Bioclimatologia; Ovino; Reprodução; Sêmen. |
Thesaurus Nal: |
Ambient temperature; Sheep; Spermatozoa. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02105naa a2200217 a 4500 001 1522581 005 2023-03-31 008 1971 bl uuuu u00u1 u #d 100 1 $aSMITH, J. F. 245 $aThe effect of temperature on characteristics of semen of rams.$h[electronic resource] 260 $c1971 520 $aAbstract: The effect on a number of semen characteristics of exposure to four periods (4, 6, 9, and 13.5 hr) of high temperature (41¦C) was studied in nine rams. Individual rams varied in their susceptibility to seminal degeneration, and repeatability within rains at successive heat treatments was low. There were significant linear effects of duration of heat treatment on volume, density, number of spermatozoa per ejaculate, percentage of abnormal spermatozoa, motility, fructose concentration, and reaction time. There was a significant effect of week of collection after treatment on all characteristics. The major component of this effect was quadratic, showing a degeneration and recovery pattern. Evidence of degeneration appeared at approximately the 12th day and reached its maximum at the 19th day, after which recovery was shown up to the 30th day. This pattern was observed in most of the characteristics studied. There was a significant negative correlation (r = -0.593 ; P < 0.01) between a mean semen composite score and the maximum subcutaneous scrotal temperature recorded during the corresponding heat treatment period. Correlations between mean semen composite score and the increase in scrotal temperature (r = -0.22) and the minimum difference between body and scrotal temperature (r = +0.33) were not significant. Thus, the maximum subcutaneous scrotal temperature appears the important factor involved in seminal degeneration following exposure to high temperature. 650 $aAmbient temperature 650 $aSheep 650 $aSpermatozoa 650 $aBioclimatologia 650 $aOvino 650 $aReprodução 650 $aSêmen 653 $aSeminal degeneration 773 $tAustralian Journal of Agricultural Research$gv. 22, n. 3, p. 481-490, 1971.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
Registros recuperados : 2 | |
1. |  | QUEIROZ, F. B. D. de; CHAGAS, E. A.; SANTOS, V. A. dos; ALBUQUERQUE, T. C. S. de; RODRIGUEZ, C. A.; RIBEIRO, M. I. G.; VILENA, J. de O. Concentrações de uréia e intervalo de aplicação para formação de porta-enxertos de camucamuzeiro. In: SIMPÓSIO INTERNACIONAL DE BOTÂNICA APLICADA, 2.; SIMPÓSIO NACIONAL DE FRUTÍFERAS E ORNAMENTAIS DO NORTE E NORDESTE, 2., 2013, Manaus. Anais... Manaus: Ufam, 2013.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Roraima. |
|   |
2. |  | BETHONICO, M. B. de M.; COSTA, P. da; REPETTO, M.; EULER, A. M. C.; SGANZERLA, A.; LAPOLA, D. M.; BIJOU, J. J.; SILVA, L. de J. de S.; GUERREIRO, Q. L. de M.; OLIVEIRA JUNIOR, R. C. de; SOUSA, W. P. de; CASTILHO, C. V. de; SANTOS, D. B. dos; QUEIROZ, F. B. D. de; SILVA, K. E. da; GUEDES, M. C. Análise situacional de comunidades extrativistas de castanha-da-amazônia. In: WADT, L. H. de O.; MAROCCOLO, J. F.; GUEDES, M. C.; SILVA, K. E. da (ed.). Castanha-da-amazônia: estudos sobre a espécie e sua cadeia de valor. Brasília, DF: Embrapa, 2023. cap. 10, p. 261-284. V.1 - Aspectos sociais, econômicos e organizacionais. ODS 2, ODS 8, ODS 10.Tipo: Capítulo em Livro Técnico-Científico |
Biblioteca(s): Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Meio Ambiente; Embrapa Roraima; Embrapa Unidades Centrais. |
|    |
Registros recuperados : 2 | |
|
Nenhum registro encontrado para a expressão de busca informada. |
|
|