Data/hora: 20/05/2024 08:45:38

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 06/06/1995
Data da última atualização: | 19/05/2009
Autoria: | SIMPLICIO, A. A.
Título: | Reproduction in three native genotypes of goats under two feeding management systems in Northeast Brazil.
Ano de publicação: | 1985
Fonte/Imprenta: | 1985.
Páginas: | 120 f.
Idioma: | Inglês
Notas: | Dissertation (Doctor of Philosophy) - Utah State Unversity, Logan.
Conteúdo: | Experiment I was conducted in the National Goat Research Center, Northeast Brazil, to determine the influence of feeding-management on estrus and ovoluation. Twelve does each of Marota, Moxoto and Undefined Breed Type (SDR) were grazed on native pasture (one animal/1.8 ha/year). Twenty-four does of each genotype were fed in confinement (cottonseed and cornmeal mixture, 16.7% crude protein, and green chopped elephant grass, ad libitum). Of the total, the occurrence of does showing estrus and ovulating varied from 46.8 to 92.1% and from 56.9 to 86.1% per month. From 2655 estrous periods, 97.8% represented estrous cycles, while 2.2% were anestrous periods (> 6e days). Os estrous cycles, 16.6, 57.7 and 25.8% were short (<17), normal (17-24) and long (25-63 days),and mean lengths were 7.6 +- 0.13, 21.2 +- 0.04 and 35.8 +- 0.37 days respectively. Mean length of anestrous periods was 90.7 +- 3.23 days. Feeding-management systems did not influence (P > 0.05) length of estrous cycles or anestrous periods. Estrous periods observed were 33.1% Marota, 27.5% Moxoto and 39.4% SRD (P < 0.05). The incidence of estrus was higher (P < 0.05) in native pasture than confinement (53.0 vs. 47.0%). Ovulation rates were higher (P < 0.05) for SRD (1.7) than Marota or Moxoto (1.4) and P < 0.01) for native pasture (1.6) than confinement (1.4). The proportion of does ovulating was similar (P > 0.05) in native pasture and confinement (69.9 vs. 72.5%). Experiment II was conducted at the Agricultural Experiment Station, Utah, with Spanish...
Palavras-Chave: | Brasil; Genotypes; Regiao Nordeste.
Thesagro: | Cabra; Genótipo; Manejo; Pastagem; Reprodução.
Thesaurus Nal: | animal nutrition; grazing; reproduction.
Categoria do assunto: | --
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (29829-1) - ADC - TS - -- - TS0461 -  - TS0461 - DIS