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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
30/01/1996 |
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Data da última atualização: |
05/06/2023 |
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Autoria: |
MANI, A. U.; McKELVEY, W. A. C.; WATSON, E. D. |
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Título: |
The effecrs of low level of feeding on response to synchronization of estrus, ovulation rate and embryo loss in goats. |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Theriogenology, v. 38, n. 6, p. 1013-1022, Dec. 1992. |
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DOI: |
https://doi.org/10.1016/0093-691X(92)90115-8 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Mature nonlactating British Saanen and Toggenburg does with a body score 2 were fed 25% (n=24) and 100% (n=16) maintenance rations from about 19 days before mating until slaughter at approximately 60 days after mating. Estrus was synchronized using PGF2?, and the ovulation rate was determined by laparoscopic examination of the ovaries once between Days 6 and 10 after mating. Pregnancy rate, potential kidding rate and embryo loss were determined by counts of viable fetuses at slaughter. The proportion of does in estrus within 96 hours of PGF2? administration was not different (P<0.5) between the feed-restricted and the maintenance groups (71.0% and 87.5%, respectively); however, the time of onset of estrus after PGF2? tended to be longer (P=0.12) in the feed-restricted group. Ovulation rate, incidence of multiple ovulations and proportion of does pregnant at 60 days were significantly lower (P=0.0004, P=0.025, P=0.05, respectively) in the restricted group. More embryos from single than multiple ovulations were lost in the restricted group (P=0.01). There was no difference in the overall ovulatory activity between right and left ovaries in the 2 groups. Transuterine migrations were observed in all does that had unilateral multiple ovulations. No migration was observed in does which had single ovulations. These data indicate that restricted feed intake in goats tended to delay the onset of estrus and lowered the ovulation rate, incidence of multiple ovulations, and pregnancy rate. MenosAbstract: Mature nonlactating British Saanen and Toggenburg does with a body score 2 were fed 25% (n=24) and 100% (n=16) maintenance rations from about 19 days before mating until slaughter at approximately 60 days after mating. Estrus was synchronized using PGF2?, and the ovulation rate was determined by laparoscopic examination of the ovaries once between Days 6 and 10 after mating. Pregnancy rate, potential kidding rate and embryo loss were determined by counts of viable fetuses at slaughter. The proportion of does in estrus within 96 hours of PGF2? administration was not different (P<0.5) between the feed-restricted and the maintenance groups (71.0% and 87.5%, respectively); however, the time of onset of estrus after PGF2? tended to be longer (P=0.12) in the feed-restricted group. Ovulation rate, incidence of multiple ovulations and proportion of does pregnant at 60 days were significantly lower (P=0.0004, P=0.025, P=0.05, respectively) in the restricted group. More embryos from single than multiple ovulations were lost in the restricted group (P=0.01). There was no difference in the overall ovulatory activity between right and left ovaries in the 2 groups. Transuterine migrations were observed in all does that had unilateral multiple ovulations. No migration was observed in does which had single ovulations. These data indicate that restricted feed intake in goats tended to delay the onset of estrus and lowered the ovulation rate, incidence of multiple ovulations, and pr... Mostrar Tudo |
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Palavras-Chave: |
Estro; Sincronizacao. |
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Thesagro: |
Alimentação; Caprino; Reprodução. |
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Thesaurus Nal: |
Estrus synchronization; Goats; Ovulation; Pregnancy rate; Reproduction; Restricted feeding; Ruminant nutrition. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| 1. |  | GOMES, T. O.; CONDE, E. M.; BENVENUTI, C. L.; ANDRADE, J. T. F. de; ANDRIOLI, A. Desempenho sexual de machos com CAE. In: CONGRESSO NORDESTINO DE PRODUÇÃO ANIMAL, 3.; SIMPÓSIO NORDESTINO DE ALIMENTAÇÃO DE RUMINANTES, 9.; SIMPÓSIO PARAIBANO DE ZOOTECNIA, 4., 2004, Campina Grande. Anais... Campina Grande: SNPA: UFPB-CCA, 2004. 2 f. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
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