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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
30/09/2008 |
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Data da última atualização: |
11/05/2023 |
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Autoria: |
COCKRAM, M. S.; IMLAH, P.; GODDARD, P. J.; HAARKISS, G. D.; WARAN, N. K. |
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Afiliação: |
Edinburgh Univ. (United Kingdom). Dept. of Veterinary Clinical Studies). |
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Título: |
The behavioural, endocrine and leucocyte response of ewes to repeated removal of lambs before the age of natural weaning |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
Applied Animal Behaviour Science, v. 38, n. 2, p. 127-142, Nov. 1993. |
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DOI: |
https://doi.org/10.1016/0168-1591(93)90061-S |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Changes in the blood leucocyte population in response to psychological stressors could increase susceptibility to disease and be useful in the assessment of animal welfare. This paper examines the effect of repeated lamb removal on the blood leucocyte population of ewes and quantifies the behavioural and endocrine responses to the stressor. Twelve ewes which had given birth to twins, were placed in separate pens with their lambs. After 13 days, the lambs (14–19 days old) from one group of six ewes (treatment group) were removed from the pens and placed in a pen 11 m from the nearest ewe. After 3 h the lambs were moved back to their dam. The lambs then remained with their dam for 3 h before being removed for a second period of 3 h. This procedure was repeated for 23 days. A control group of six ewes remained with their lambs continuously for the 24-day experimental period. The removal of lambs produced behavioural changes in the ewes. These included: orientation towards the lamb, vocalization, raised head, erect ears, and decreased lying and sleeping behaviours. Although these changes were present over the 24-day experimental period, there were signs of habituation after 3 days of the treatment. The endocrine responses to lamb removal were less marked. Some ewes showed a plasma cortisol and β-endorphin response on Day 1 of lamb removal, but the mean responses were not statistically different from the control group. There was no obvious plasma prolactin response to the treatment. On Day 10 of lamb removal, the blood concentration of neutrophils in the treatment ewes had increased and the proportion of CD2 lymphocytes and T19 lymphocytes had decreased compared with that of control ewes. There were no significant differences between the treatment and control ewes in either the delayed type hypersensitivity skin responses to Dinitroflurobenzene or the humoral antibody responses to ovalbumin. These results indicate that ewes can show behavioural responses to a stressor, such as repeated lamb removal. However, this stressor had no significant effect on the endocrine and immune measurements studied. MenosAbstract: Changes in the blood leucocyte population in response to psychological stressors could increase susceptibility to disease and be useful in the assessment of animal welfare. This paper examines the effect of repeated lamb removal on the blood leucocyte population of ewes and quantifies the behavioural and endocrine responses to the stressor. Twelve ewes which had given birth to twins, were placed in separate pens with their lambs. After 13 days, the lambs (14–19 days old) from one group of six ewes (treatment group) were removed from the pens and placed in a pen 11 m from the nearest ewe. After 3 h the lambs were moved back to their dam. The lambs then remained with their dam for 3 h before being removed for a second period of 3 h. This procedure was repeated for 23 days. A control group of six ewes remained with their lambs continuously for the 24-day experimental period. The removal of lambs produced behavioural changes in the ewes. These included: orientation towards the lamb, vocalization, raised head, erect ears, and decreased lying and sleeping behaviours. Although these changes were present over the 24-day experimental period, there were signs of habituation after 3 days of the treatment. The endocrine responses to lamb removal were less marked. Some ewes showed a plasma cortisol and β-endorphin response on Day 1 of lamb removal, but the mean responses were not statistically different from the control group. There was no obvious plasma prolactin response... Mostrar Tudo |
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Palavras-Chave: |
Comportamento materno; Leucócito; Leucocytes; Maternal behaviour. |
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Thesagro: |
Desmama; Ecologia Animal; Endocrinologia; Imunologia; Ovelha; Ovino. |
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Thesaurus Nal: |
Endocrinology; Immunology; Maternal behavior; Sheep; Weaning. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03189naa a2200361 a 4500
001 1534636
005 2023-05-11
008 1993 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/0168-1591(93)90061-S$2DOI
100 1 $aCOCKRAM, M. S.
245 $aThe behavioural, endocrine and leucocyte response of ewes to repeated removal of lambs before the age of natural weaning$h[electronic resource]
260 $c1993
520 $aAbstract: Changes in the blood leucocyte population in response to psychological stressors could increase susceptibility to disease and be useful in the assessment of animal welfare. This paper examines the effect of repeated lamb removal on the blood leucocyte population of ewes and quantifies the behavioural and endocrine responses to the stressor. Twelve ewes which had given birth to twins, were placed in separate pens with their lambs. After 13 days, the lambs (14–19 days old) from one group of six ewes (treatment group) were removed from the pens and placed in a pen 11 m from the nearest ewe. After 3 h the lambs were moved back to their dam. The lambs then remained with their dam for 3 h before being removed for a second period of 3 h. This procedure was repeated for 23 days. A control group of six ewes remained with their lambs continuously for the 24-day experimental period. The removal of lambs produced behavioural changes in the ewes. These included: orientation towards the lamb, vocalization, raised head, erect ears, and decreased lying and sleeping behaviours. Although these changes were present over the 24-day experimental period, there were signs of habituation after 3 days of the treatment. The endocrine responses to lamb removal were less marked. Some ewes showed a plasma cortisol and β-endorphin response on Day 1 of lamb removal, but the mean responses were not statistically different from the control group. There was no obvious plasma prolactin response to the treatment. On Day 10 of lamb removal, the blood concentration of neutrophils in the treatment ewes had increased and the proportion of CD2 lymphocytes and T19 lymphocytes had decreased compared with that of control ewes. There were no significant differences between the treatment and control ewes in either the delayed type hypersensitivity skin responses to Dinitroflurobenzene or the humoral antibody responses to ovalbumin. These results indicate that ewes can show behavioural responses to a stressor, such as repeated lamb removal. However, this stressor had no significant effect on the endocrine and immune measurements studied.
650 $aEndocrinology
650 $aImmunology
650 $aMaternal behavior
650 $aSheep
650 $aWeaning
650 $aDesmama
650 $aEcologia Animal
650 $aEndocrinologia
650 $aImunologia
650 $aOvelha
650 $aOvino
653 $aComportamento materno
653 $aLeucócito
653 $aLeucocytes
653 $aMaternal behaviour
700 1 $aIMLAH, P.
700 1 $aGODDARD, P. J.
700 1 $aHAARKISS, G. D.
700 1 $aWARAN, N. K.
773 $tApplied Animal Behaviour Science$gv. 38, n. 2, p. 127-142, Nov. 1993.
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Embrapa Caprinos e Ovinos (CNPC) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
01/12/2003 |
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Data da última atualização: |
18/03/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Nacional - B |
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Autoria: |
VOLL, E. |
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Afiliação: |
ELEMAR VOLL, CNPSO. |
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Título: |
Efeitos de ácido ferúlico em interações com densidades de soja e caruru. |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
Planta Daninha, Londrina, v. 11, n. 1/2, p. 9-14, 1993. |
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Idioma: |
Português |
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Conteúdo: |
Um experimento foi conduzido sob condições de casa-de-vegetação com o objetivo de avaliar os efeitos de ácido ferúlico (ácido 4-hidróxi-3-metóxi-t-cinâmico) sobre combinações de densidade de soja [Glycine max (L.) Merr. cv. Bragg] com caruru (Amaranthus retroflexus L.) num modelo substitutivo de competição. As proporções de plantas de soja para caruru estabelecidas por vaso foram de 4:0, 3:2, 2:4, 1:6 e 0:8. As doses de ácido ferúlico foram de zero, 500 e 1000 ppm. O delineamento experimental foi o de blocos ao acaso, com quatro repetições. A duração do experimento foi de 33 dias. Houve atraso de dois e três dias na emergência da soja, nas doses de 500 e 1000 ppm de ácido ferúlico, respectivamente. A altura das plantas de soja aumentou nas menores proporções de soja: caruru e com doses crescentes de ácido ferúlico, observando-se o oposto para o caruru. Reduções na biomassa seca por planta da parte aérea e das raízes de soja foram observadas com aumentos de proporção de plantas de soja, ao contrário do caruru. Doses crescentes de ácido ferúlico reduziram a biomassa seca da parte aérea por planta de caruru, reduzindo a produção total relativa. A competição intra-específica em cultura pura foi maior em soja do em caruru. A soja foi mais competitiva que caruru até os 33 dias após o plantio. Ácido ferúlico afetou a competitividade de caruru em maior grau do que a soja. |
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Thesagro: |
Ácido; Alelopatia; Caruru; Soja. |
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Thesaurus NAL: |
Ferulic acid; Soybeans. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 01956naa a2200193 a 4500
001 1465896
005 2024-03-18
008 1993 bl uuuu u00u1 u #d
100 1 $aVOLL, E.
245 $aEfeitos de ácido ferúlico em interações com densidades de soja e caruru.$h[electronic resource]
260 $c1993
520 $aUm experimento foi conduzido sob condições de casa-de-vegetação com o objetivo de avaliar os efeitos de ácido ferúlico (ácido 4-hidróxi-3-metóxi-t-cinâmico) sobre combinações de densidade de soja [Glycine max (L.) Merr. cv. Bragg] com caruru (Amaranthus retroflexus L.) num modelo substitutivo de competição. As proporções de plantas de soja para caruru estabelecidas por vaso foram de 4:0, 3:2, 2:4, 1:6 e 0:8. As doses de ácido ferúlico foram de zero, 500 e 1000 ppm. O delineamento experimental foi o de blocos ao acaso, com quatro repetições. A duração do experimento foi de 33 dias. Houve atraso de dois e três dias na emergência da soja, nas doses de 500 e 1000 ppm de ácido ferúlico, respectivamente. A altura das plantas de soja aumentou nas menores proporções de soja: caruru e com doses crescentes de ácido ferúlico, observando-se o oposto para o caruru. Reduções na biomassa seca por planta da parte aérea e das raízes de soja foram observadas com aumentos de proporção de plantas de soja, ao contrário do caruru. Doses crescentes de ácido ferúlico reduziram a biomassa seca da parte aérea por planta de caruru, reduzindo a produção total relativa. A competição intra-específica em cultura pura foi maior em soja do em caruru. A soja foi mais competitiva que caruru até os 33 dias após o plantio. Ácido ferúlico afetou a competitividade de caruru em maior grau do que a soja.
650 $aFerulic acid
650 $aSoybeans
650 $aÁcido
650 $aAlelopatia
650 $aCaruru
650 $aSoja
773 $tPlanta Daninha, Londrina$gv. 11, n. 1/2, p. 9-14, 1993.
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Embrapa Soja (CNPSO) |
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