The potential for improving physiological, behavioural and immunological responses in the neonatal lamb by trace element and vitamin supplementation of the ewe
Neonatal lamb mortality represents both a welfare issue (due to the considerable suffering and distress) and an important production inefficiency. In lambs, approximately 80% of mortality can be attributed to the starvation–mismothering–exposure complex and occurs in the first 3 days after birth. It...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2008-01-01
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| Series: | Animal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1751731107001255 |
| _version_ | 1818907261953638400 |
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| author | J.A. Rooke C.M. Dwyer C.J. Ashworth |
| author_facet | J.A. Rooke C.M. Dwyer C.J. Ashworth |
| author_sort | J.A. Rooke |
| collection | DOAJ |
| description | Neonatal lamb mortality represents both a welfare issue (due to the considerable suffering and distress) and an important production inefficiency. In lambs, approximately 80% of mortality can be attributed to the starvation–mismothering–exposure complex and occurs in the first 3 days after birth. It was the object of this review to determine the micronutrient(s) most likely to have a positive effect on neonatal lamb survival when included above the requirement for that micronutrient. Micronutrients discussed were Co, Cu, I, Fe, Mn, Se, Zn, vitamins A and E and n-3 fatty acids. For Co, Fe, Mn and Zn, there was no evidence of positive responses to supplementation. Cu and I had toxicity thresholds that were sufficiently close to requirement that supplementing above requirement presented a risk of inducing toxicity. In the case of vitamin A, while serum concentrations indicated that sub-optimal status did exist, long-term buffering from liver stores (from grazing) makes experimentation difficult and practical benefits to supplementation unlikely. Therefore, the most likely candidates for supplementation were Se, vitamin E and fatty acids. Fatty acid supplementation with fish oils or docosahexaenoic acid-containing algal biomass consistently improved lamb vigour but it is unlikely that supplementation will be economic. Positive responses to Se supplementation throughout gestation were recorded. However, in many studies the Se status of control ewes was marginal and there is a need for more studies where control ewes are clearly adequate in Se. Positive responses to vitamin E supplementation above requirement in the last-third of gestation were observed but the optimum dietary inclusion of vitamin E and period of feeding during pregnancy still require clarification. |
| first_indexed | 2024-12-19T21:52:19Z |
| format | Article |
| id | doaj.art-64d85064d9414b8584aedfc64a7abfd8 |
| institution | Directory Open Access Journal |
| issn | 1751-7311 |
| language | English |
| last_indexed | 2024-12-19T21:52:19Z |
| publishDate | 2008-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Animal |
| spelling | doaj.art-64d85064d9414b8584aedfc64a7abfd82022-12-21T20:04:22ZengElsevierAnimal1751-73112008-01-0124514524The potential for improving physiological, behavioural and immunological responses in the neonatal lamb by trace element and vitamin supplementation of the eweJ.A. Rooke0C.M. Dwyer1C.J. Ashworth2Sustainable Livestock Systems, SAC, West Mains Road, Edinburgh EH9 3JG, UKSustainable Livestock Systems, SAC, West Mains Road, Edinburgh EH9 3JG, UKSustainable Livestock Systems, SAC, West Mains Road, Edinburgh EH9 3JG, UKNeonatal lamb mortality represents both a welfare issue (due to the considerable suffering and distress) and an important production inefficiency. In lambs, approximately 80% of mortality can be attributed to the starvation–mismothering–exposure complex and occurs in the first 3 days after birth. It was the object of this review to determine the micronutrient(s) most likely to have a positive effect on neonatal lamb survival when included above the requirement for that micronutrient. Micronutrients discussed were Co, Cu, I, Fe, Mn, Se, Zn, vitamins A and E and n-3 fatty acids. For Co, Fe, Mn and Zn, there was no evidence of positive responses to supplementation. Cu and I had toxicity thresholds that were sufficiently close to requirement that supplementing above requirement presented a risk of inducing toxicity. In the case of vitamin A, while serum concentrations indicated that sub-optimal status did exist, long-term buffering from liver stores (from grazing) makes experimentation difficult and practical benefits to supplementation unlikely. Therefore, the most likely candidates for supplementation were Se, vitamin E and fatty acids. Fatty acid supplementation with fish oils or docosahexaenoic acid-containing algal biomass consistently improved lamb vigour but it is unlikely that supplementation will be economic. Positive responses to Se supplementation throughout gestation were recorded. However, in many studies the Se status of control ewes was marginal and there is a need for more studies where control ewes are clearly adequate in Se. Positive responses to vitamin E supplementation above requirement in the last-third of gestation were observed but the optimum dietary inclusion of vitamin E and period of feeding during pregnancy still require clarification.http://www.sciencedirect.com/science/article/pii/S1751731107001255lamb mortalitysheepsupplementationtrace elementsvitamins |
| spellingShingle | J.A. Rooke C.M. Dwyer C.J. Ashworth The potential for improving physiological, behavioural and immunological responses in the neonatal lamb by trace element and vitamin supplementation of the ewe Animal lamb mortality sheep supplementation trace elements vitamins |
| title | The potential for improving physiological, behavioural and immunological responses in the neonatal lamb by trace element and vitamin supplementation of the ewe |
| title_full | The potential for improving physiological, behavioural and immunological responses in the neonatal lamb by trace element and vitamin supplementation of the ewe |
| title_fullStr | The potential for improving physiological, behavioural and immunological responses in the neonatal lamb by trace element and vitamin supplementation of the ewe |
| title_full_unstemmed | The potential for improving physiological, behavioural and immunological responses in the neonatal lamb by trace element and vitamin supplementation of the ewe |
| title_short | The potential for improving physiological, behavioural and immunological responses in the neonatal lamb by trace element and vitamin supplementation of the ewe |
| title_sort | potential for improving physiological behavioural and immunological responses in the neonatal lamb by trace element and vitamin supplementation of the ewe |
| topic | lamb mortality sheep supplementation trace elements vitamins |
| url | http://www.sciencedirect.com/science/article/pii/S1751731107001255 |
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