Data/hora: 10/06/2024 00:25:33

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 19/01/2016
Data da última atualização: | 19/10/2016
Autoria: | BRYANT, M. J.; AMOAH, E. A.
Título: | Factors affecting gestation period, litter size and birth weight in dairy goats.
Ano de publicação: | 1982
Fonte/Imprenta: | In: INTERNATIONAL CONFERENCE ON GOAT PRODUCTION AND DISEASE, 3., 1982, Tucson. Proceedings... Scottsdale: Dairy Goat Journal, 1982. p. 304
ISBN: | 0930848179.
Idioma: | Inglês
Conteúdo: | A survey was conducted among dairy goat herds in Southern England and Wales over a two year period. In year 1, 265 breeding females (does) in 7 herds were recorded. This was reduced to 130 does in 4 herds in year 2. The results collected for gestation length, litter size and birth weight were computed using a general linear modeling programme (GLIM 3). A regression equation shows the relationship between gestation period (GP) and litter size (LS) to be GP equal -0.988 estimated regression coefficient that depends on breed and herd. The age of the doe did not seem to have a significant influence upon the variability of GP. Neither the age nor the breed of the doe appeared to influence LS. There was no simple linear relationship between birth weight and other factors. The equation BW equal -0.351 LS + 0.59 P is a simplified multiple regression involving birth weight (BW), the litter size of the doe (LS), the parity of the doe (P) and the regression coefficient (RC) that varies according to the herd, the breed and the age of the doe
Palavras-Chave: | Losses; Reino Unido.
Thesagro: | Cabra leiteira; Caprino; Eficiência reprodutiva; Óvulo; Perda; Peso ao nascer; Produção animal.
Thesaurus Nal: | Animal production; Birth weight; Goats; Litter size; Litter weight; Ova; Reproduction; Reproductive performance; United Kingdom.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (29764-1) - ADD - PL - PP -  -  -  - DIS