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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
19/07/2017 |
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Data da última atualização: |
19/07/2017 |
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Autoria: |
GIBSON, W. R.; ROBINSON, T. J. |
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Título: |
The seasonal nature of reproductive phenomena in the sheep. I. Variation in sensitivity to oestrogen. |
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Ano de publicação: |
1971 |
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Fonte/Imprenta: |
Journal of Reproduction and Development, v. 24, n. 1, p. 9-18, Jan. 1971. |
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DOI: |
10.1530/jrf.0.0240009 |
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Idioma: |
Inglês |
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Conteúdo: |
Three groups, each of twelve spayed crossbred ewes, were maintained for 12 months on three different nutritional regimens. Twice each month each group was treated in a standardized fashion with progesterone followed by three doses (10·0, 15·6, 24·4 ?g) of oestradiol benzoate, and oestrous behaviour and vaginal oestrus were recorded. There was a seasonal pattern of variation in sensitivity to oestrogen which was modified by nutritional treatment. During late winter-rearly spring (August to October), loss of live weight was associated with decrease in sensitivity and maintenance or increase in live weight with increase in sensitivity. No such relationship was shown at other times of the year. Sensitivity was uniformly low, regardless of nutritional regimen, in late spring-early summer (November to January). It is concluded that nutritional status during the August to October period when entire ewes are entering into anoestrus could have an important bearing on the incidence of ovulation without oestrus ('silent heat'). During the remainder of the year, nutritional status appears relatively unimportant. |
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Palavras-Chave: |
Oestrogens. |
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Thesagro: |
Estradiol. |
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Thesaurus Nal: |
Body Weight; Pharmacology; Pregnancy; Progesterone; Reproduction; Sheep; Temperature. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 01837naa a2200253 a 4500
001 2072919
005 2017-07-19
008 1971 bl uuuu u00u1 u #d
024 7 $a10.1530/jrf.0.0240009$2DOI
100 1 $aGIBSON, W. R.
245 $aThe seasonal nature of reproductive phenomena in the sheep. I. Variation in sensitivity to oestrogen.
260 $c1971
520 $aThree groups, each of twelve spayed crossbred ewes, were maintained for 12 months on three different nutritional regimens. Twice each month each group was treated in a standardized fashion with progesterone followed by three doses (10·0, 15·6, 24·4 ?g) of oestradiol benzoate, and oestrous behaviour and vaginal oestrus were recorded. There was a seasonal pattern of variation in sensitivity to oestrogen which was modified by nutritional treatment. During late winter-rearly spring (August to October), loss of live weight was associated with decrease in sensitivity and maintenance or increase in live weight with increase in sensitivity. No such relationship was shown at other times of the year. Sensitivity was uniformly low, regardless of nutritional regimen, in late spring-early summer (November to January). It is concluded that nutritional status during the August to October period when entire ewes are entering into anoestrus could have an important bearing on the incidence of ovulation without oestrus ('silent heat'). During the remainder of the year, nutritional status appears relatively unimportant.
650 $aBody Weight
650 $aPharmacology
650 $aPregnancy
650 $aProgesterone
650 $aReproduction
650 $aSheep
650 $aTemperature
650 $aEstradiol
653 $aOestrogens
700 1 $aROBINSON, T. J.
773 $tJournal of Reproduction and Development$gv. 24, n. 1, p. 9-18, Jan. 1971.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 11 | |
| 6. |  | ROBINSON, T. K.; PINTO, C. E.; BRAMBILLA, D.; PEREZ, N. B.; NABINGER, C. Morphogenic analysis of three geographical populations of Eragrostis plana ness in South of Brazil. In: INTERNATIONAL RANGELAND CONGRESS, 9., 2011, Rosario. Diverse rangelands for a sustainable society. Buenos Aires: Fundación Argeninta, 2011. p. 205. 1 CD-ROM. Autores Susana Feldman; Oliva, Gabriel; Mónica Sacido.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sul. |
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| 10. | | MACEDO, T. A. de; MICHELON, M. F.; CARMINATTI, J. F.; GRILO, L.; RUFATO, A. de R.; RUFATO, L.; ROBINSON, T. L. Chill requirement and budburst uniformity on cultivar maxigala grafted on different rootstocks. In: ORCHAD SYSTEMS SYMPOSIUM, 11., 2016. Integrating Canopy, Rootstookhand Environment Physiology in Orchard Systems: Anais... .Bologna, 28/08 a 2/09 de 2016. p. 108.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Uva e Vinho. |
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| 11. | | MAGRO, M.; RUFATO, L.; SANDER, G. F.; SANDOS, A. M. dos; RUFATO, A. de R.; KRETZSCHMAR, A. A.; ROBINSON, T. L. Maturation behavior of Maxi Gala grafetd on two rootstocks by no Destructive Method. In: ORCHAD SYSTEMS SYMPOSIUM, 11., 2016. Integrating Canopy, Rootstookhand Environment Physiology in Orchard Systems: Anais... .Bologna, 28/08 a 2/09 de 2016. p. 107.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Uva e Vinho. |
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| Registros recuperados : 11 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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