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Biblioteca(s):  Embrapa Caprinos e Ovinos.
Data corrente:  06/04/2005
Data da última atualização:  06/04/2005
Autoria:  DWYER, C. M.; LAWRENCE, A. B.; BISHOP, S. C.
Título:  The effects of selection for lean tissue content on maternal and neonatal lamb behaviours in Scottish Blackface sheep.
Ano de publicação:  2001
Fonte/Imprenta:  Animal Science, v. 72, pt 3, p. 555-571, 2001.
Idioma:  Inglês
Conteúdo:  British hill sheep are required to give birth to and rear their lambs under harsh extensive conditions. The aim of this study was to investigate whether genetic selection for increased (LEAN) or decreased (FAT) carcass lean content in the Scottish Blackface breed over 7 years had affected the ability of ewes to rear lambs by altering the expression of maternal and neonatal lamb behaviours. The behaviour of 61 ewes (32 LEAN and 29 FAT) and their 119 lambs were recorded at parturition and over the first 8 weeks of life. Overall there were very few effects of selection on the behaviour of the ewes. LEAN ewes were significantly faster than FAT ewes to start grooming their lambs afier birth and FAT ewes tended to withdraw more frequently from their lambs than LEAN ewes. There was, however, a highly significant effect of selection line on lamb behaviour. LEAN lambs were significantly quicker than FAT lambs to perform all righting movements (median latency to stand (mins): LEAN = 11.7, FAT = 23.4, P < 0.01), were more likely both to suck (percentage that sucked: LEAN = 81.0%, FAT = 57.1%, P < 0.05), and to play within the first 2 h of birth. The higher rate of sucking in LEAN lambs persisted over the first 3 days afier birth (percent observations where lambs were sucking: LEAN = 7.8 (s.e. 0.8), FAT = 5.1 (s.e. 0.6), P < 0.05), when LEAN lambs were also significantly doser to their mothers tnan FAT lambs. There after, there were no significant effects of ewe or lamb line on behaviou... Mostrar Tudo
Palavras-Chave:  Comportamento materno; Recém nascido.
Thesagro:  Cordeiro; Mortalidade Animal; Ovino.
Categoria do assunto:  --
Marc:  Mostrar Marc Completo
Registro original:  Embrapa Caprinos e Ovinos (CNPC)
Biblioteca ID Origem Tipo/Formato Classificação Cutter Registro Volume Status
CNPC17613 - 1ADCAP - --v.72,p.555


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