Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
19/01/1998 |
Data da última atualização: |
16/01/2017 |
Autoria: |
TOMAR, S. S.; MAHAJAN, J. M. |
Título: |
Influence of season of breeding and live weight of ewe on the fertility of Gaddi sheep. |
Ano de publicação: |
1978 |
Fonte/Imprenta: |
The Indian Journal of Animal Science, v. 48, n. 4, p. 271-274, Apr. 1978. |
Idioma: |
Inglês |
Conteúdo: |
In the present paper, some observations made on the lambing percentahe of Gaddi ewes in relation to season and year of breeding, and their live weight are reported. Lambing performance of about 350 Gaddi ewes bred for 10 yr (1966-1975) in the autumn and spring breeding seasons, was studied. Overall lambing percentage averaged 71.4 and was significantly influenced by 5 yr period of mating (75.9% for the 1st 5 yr period vs. 67.7% for the 2nd 5 yr period). The year of mating also had a significant effect on this trait (the values varied from 50.0-90.0% among years). The lambing per cent did not vary in the ewes bred in the 2 breeding seasons. The live weight of ewes had a highly significant effect on fertility. The correlation coefficient between live weight of ewe and lambing percentage was positive and highly significant (r = 0.173). |
Palavras-Chave: |
Peso vivo. |
Thesagro: |
Fertilidade; Manejo; Ovino; Reprodução animal. |
Thesaurus Nal: |
Sheep. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 01415naa a2200205 a 4500 001 1518029 005 2017-01-16 008 1978 bl uuuu u00u1 u #d 100 1 $aTOMAR, S. S. 245 $aInfluence of season of breeding and live weight of ewe on the fertility of Gaddi sheep. 260 $c1978 520 $aIn the present paper, some observations made on the lambing percentahe of Gaddi ewes in relation to season and year of breeding, and their live weight are reported. Lambing performance of about 350 Gaddi ewes bred for 10 yr (1966-1975) in the autumn and spring breeding seasons, was studied. Overall lambing percentage averaged 71.4 and was significantly influenced by 5 yr period of mating (75.9% for the 1st 5 yr period vs. 67.7% for the 2nd 5 yr period). The year of mating also had a significant effect on this trait (the values varied from 50.0-90.0% among years). The lambing per cent did not vary in the ewes bred in the 2 breeding seasons. The live weight of ewes had a highly significant effect on fertility. The correlation coefficient between live weight of ewe and lambing percentage was positive and highly significant (r = 0.173). 650 $aSheep 650 $aFertilidade 650 $aManejo 650 $aOvino 650 $aReprodução animal 653 $aPeso vivo 700 1 $aMAHAJAN, J. M. 773 $tThe Indian Journal of Animal Science$gv. 48, n. 4, p. 271-274, Apr. 1978.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |