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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
10/05/2023 |
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Autoria: |
CUMMING, I. A.; McDONALD, M. F. |
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Título: |
Embryo survival in mature romney ewes relative to live weight and face cover. |
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Ano de publicação: |
1970 |
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Fonte/Imprenta: |
New Zealand Journal of Agricultural Research, v. 13, n. 2, p. 372-384, 1970. |
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DOI: |
10.1080/00288233.1970.10425410 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: In Experiment 1 fertilised eggs were transplanted at the rate of 1, 2, or 4 per recipient ewe and these animals were autopsied in early pregnancy. In Experiment 2 ewes were mated to fertile rams and autopsied 18–30 days later. Some of these ewes had not conceived to egg transfer (Expt 1). Transfer of 1, 2, or 4 eggs did not affect the percentage of ewes which became pregnant. An ovum had a greater chance of surviving if transferred singly rather than as one of a multiple number of eggs. The number of corpora lutea (lor 2) did not affect the rate of survival of transferred ova or survival of ova in mated ewes. No significant relationship existed between live weight of the ewe and survival of ova. Face cover was related (P < 0.01) to rate of survival of ova among ewes transplanted with 2 eggs each, but no clear effect was apparent in the other ewes after egg transfer or in the mated ewes. |
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Palavras-Chave: |
Embryo survival; Peso vivo. |
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Thesagro: |
Embrião; Fisiologia; Ovino; Reprodução; Sobrevivência. |
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Thesaurus Nal: |
Embryo (animal); Pregnancy; Reproduction; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
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001 1520588
005 2023-05-10
008 1970 bl uuuu u00u1 u #d
024 7 $a10.1080/00288233.1970.10425410$2DOI
100 1 $aCUMMING, I. A.
245 $aEmbryo survival in mature romney ewes relative to live weight and face cover.$h[electronic resource]
260 $c1970
520 $aAbstract: In Experiment 1 fertilised eggs were transplanted at the rate of 1, 2, or 4 per recipient ewe and these animals were autopsied in early pregnancy. In Experiment 2 ewes were mated to fertile rams and autopsied 18–30 days later. Some of these ewes had not conceived to egg transfer (Expt 1). Transfer of 1, 2, or 4 eggs did not affect the percentage of ewes which became pregnant. An ovum had a greater chance of surviving if transferred singly rather than as one of a multiple number of eggs. The number of corpora lutea (lor 2) did not affect the rate of survival of transferred ova or survival of ova in mated ewes. No significant relationship existed between live weight of the ewe and survival of ova. Face cover was related (P < 0.01) to rate of survival of ova among ewes transplanted with 2 eggs each, but no clear effect was apparent in the other ewes after egg transfer or in the mated ewes.
650 $aEmbryo (animal)
650 $aPregnancy
650 $aReproduction
650 $aSheep
650 $aEmbrião
650 $aFisiologia
650 $aOvino
650 $aReprodução
650 $aSobrevivência
653 $aEmbryo survival
653 $aPeso vivo
700 1 $aMcDONALD, M. F.
773 $tNew Zealand Journal of Agricultural Research$gv. 13, n. 2, p. 372-384, 1970.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
