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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
06/04/2005 |
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Data da última atualização: |
06/04/2005 |
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Autoria: |
DWYER, C. M.; LAWRENCE, A. B.; BISHOP, S. C. |
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Título: |
The effects of selection for lean tissue content on maternal and neonatal lamb behaviours in Scottish Blackface sheep. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Animal Science, v. 72, pt 3, p. 555-571, 2001. |
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Idioma: |
Inglês |
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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 behaviours recorded up to 8 weeks afier birth. Overall lamb mortality to 8 weeks was 19.3% and was not significantly affected by lamb line. However, lambs that were slow to perform early behaviours had a reduced survival to 8 weeks of age. These data suggest that, although ewe maternal behaviour has not been significantly affected by selection for lean growth, the activity of the neonatal lamb has been affected. Lamb activity was related to lamb survival, even in our indoor lambing conditions. It is likely that the speed with which newborn lambs stand and suck will be even more important for survival under extensive conditions. MenosBritish 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 |
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Palavras-Chave: |
Comportamento materno; Recém nascido. |
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Thesagro: |
Cordeiro; Mortalidade Animal; Ovino. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02732naa a2200205 a 4500
001 1531078
005 2005-04-06
008 2001 bl uuuu u00u1 u #d
100 1 $aDWYER, C. M.
245 $aThe effects of selection for lean tissue content on maternal and neonatal lamb behaviours in Scottish Blackface sheep.
260 $c2001
520 $aBritish 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 behaviours recorded up to 8 weeks afier birth. Overall lamb mortality to 8 weeks was 19.3% and was not significantly affected by lamb line. However, lambs that were slow to perform early behaviours had a reduced survival to 8 weeks of age. These data suggest that, although ewe maternal behaviour has not been significantly affected by selection for lean growth, the activity of the neonatal lamb has been affected. Lamb activity was related to lamb survival, even in our indoor lambing conditions. It is likely that the speed with which newborn lambs stand and suck will be even more important for survival under extensive conditions.
650 $aCordeiro
650 $aMortalidade Animal
650 $aOvino
653 $aComportamento materno
653 $aRecém nascido
700 1 $aLAWRENCE, A. B.
700 1 $aBISHOP, S. C.
773 $tAnimal Science$gv. 72, pt 3, p. 555-571, 2001.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| 1. |  | SILVA, M. C.; MATIKA, O.; BISHOP, S. C.; PEREIRA, R. M.; MOURA, M. I.; McMANUS, C. M.; FIORAVANTI, M. C. S.; JULIANO, R. S.; SERENO, J. R. B. Autocorrelação espacial e descontinuidades genéticas em bovinos Pantaneiro e Curraleiro Pé-Duro: uma abordagem da genética geográfica com uso de marcadores SNP. In: SIMPOSIO IBEROAMERICANO SOBRE CONSERVACIÓN Y UTILIZACIÓN DE RECURSOS ZOOGENÉTICOS, 16., 2015, Villavicencio, Colombia. Iberoamérica compartirá experiencias y logros científicos: libro de resúmenes. Villavicencio, Colombia: Asocriollanos: Red Conbiand Colombia: Universidad Nacional de Colombia Sede Palmira, 2015. p. 74.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
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