Data/hora: 15/06/2024 04:02:34

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 06/06/2018
Data da última atualização: | 06/06/2018
Autoria: | RATTRAY, P. V.; SMITH, J. F.; WINN, G. W.; MacLEAN, K. S.
Título: | Effects of genotype, liveweight, pasture type and feeding level on ovulation responses in ewes.
Ano de publicação: | 1981
Fonte/Imprenta: | Proceedings of the New Zealand Society of Animal Production, v. 41, p. 174-182, 1981.
Idioma: | Inglês
Conteúdo: | In a multifactorial experiment, groups (n = 25/group) of Coopworth, Commercial (C) Romney and Waihora (W) Romney ewes, differentially fed over summer to achieve either high (H) or low (L) pre-flushing weights (54-57 v 41-43 kg), were offered 3 levels of clover or ryegrass dominant pasture for 6 weeks prior to a synchronised mating. Pre-flushing weight and pasture type significantly influenced ovulation rate. W Romney ewes responded differently from the other genotypes as feeding level increased. Probability of a multiple ovulation was 0.62 and 0.75 for the L and H ewes; and 0.75 and 0.61 for the clover and ryegrass pastures, respectively. For increasing feeding levels, probabilities for the Coopworth were 0.34, 0.78 and 0.72; C Romney 0.48, 6.70 and 0.65; and W Romnep 0.71, 0.76 and 0.88, respectively. By inclusion of both pre-flushing and pre-mating weight in the model probability contours were derived for each genotype.
Thesaurus Nal: | Animal nutrition; Animal reproduction; Ewes; Pastures; Sheep.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (37111-1) - ADD - AP - PP -  -  -  - DIS