Data/hora: 09/06/2024 00:25:18

Biblioteca(s): | Embrapa Meio-Norte.
Data corrente: | 22/04/1997
Data da última atualização: | 22/04/1997
Autoria: | YAMIN, M.; PAYNE, G.; BLACKSHAW, J. K.
Título: | The time of birth and the choice of birth sites by booroola merino ewes and angora goats.
Ano de publicação: | 1995
Fonte/Imprenta: | Applied Animal Behaviour Science, v. 45, n. 42, p. 89-96, 1995.
Idioma: | Inglês
Conteúdo: | Heterozygous (69) and homozygous (38) Booroola Merino ewes and 82 Angora does were observed to determine birth sites, times of birth and characteristics of the birth site in 1991. During the second year of observation (1992) the numbers of animals available were reduced to 48 heterozygous and 33 homozygous Booroola Merino ewes and 49 Angora does. The birth times were randomly distributed over 24 h for heterozygous and homozygous ewes and were similar for both years. There were no differences between the genotypes of sheep. However, the Angora goats gave birth more frequently during the daylight hours. There was no effect of the age of does or ewes on choice of birth site and elevation of the paddock did not affect this choice.  When paddock features wereclassified into three types of birth sites (open sites, shady areas and areas close to vertical objects), there was no significant difference in the choice of birth sites by ewes during 1991. However, in 1992, births occured more frequently in open areas. If shady sites and  areas close to vertical objects  were combined as protected areas, there was no difference between the choice of protected or open areas in the 2 years. In 1991 the does chose the protected areas rather than open areas to give birth but this difference was not significant in 1992.
Palavras-Chave: | Birth sites; Goat; Local de nascimento.
Thesagro: | Caprino; Ovino.
Thesaurus Nal: | sheep.
Categoria do assunto: | --
Registro original: | Embrapa Meio-Norte (CPAMN)
Exemplares: | CPAMN - (6090-1) - ADC - SP - -- - S 10853 -  - S 10853 - DIS