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Effect of plant extracts used as a methane mitigation additive on carcass fat content and fatty acid composition of South African Merino sheep
Dissertation (MSc Agric Animal Science: (Animal nutrition))--University of Pretoria, 2021.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2021
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| _version_ | 1867613457784766464 |
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| access_status_str | Open Access |
| author2 | Webb, E.C. (Edward Cottington) |
| author_browse | Webb, E.C. (Edward Cottington) |
| author_facet | Webb, E.C. (Edward Cottington) |
| collection | Thesis |
| dc_rights_str_mv | © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MSc Agric Animal Science: (Animal nutrition))--University of Pretoria, 2021. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/80304 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:36:27.633Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/80304 Effect of plant extracts used as a methane mitigation additive on carcass fat content and fatty acid composition of South African Merino sheep Webb, E.C. (Edward Cottington) u17194394@tuks.co.za Hassen, Abubeker Olaniyi, Michael Olanrewaju UCTD Nutrition-physiology Dissertation (MSc Agric Animal Science: (Animal nutrition))--University of Pretoria, 2021. There is growing apprehension about the use of antibiotics such as monensin in the reduction of enteric methane emissions. This has initiated the utilisation of multipurpose medicinal plants as an alternative, although there are limited efforts to understand the effect of medicinal plant extracts on animal product quality. This research used Moringa oleifera and Azadirachta indica (A. Juss) leaf extracts to replace monensin with aim of assessing the effects of the plant extract on tissue fat content and fatty acid composition of South African (SA) Mutton Merino sheep. The experimental treatments involved 40 ram lambs in a randomised complete block design into four feed additive treatment levels (i.e., negative-control, Azadirachta indica, Moringa oleifera, and monensin). Twenty-four sheep were randomly selected at 60 - 65kg bodyweight, slaughtered, and the post mortem samples were collected over a 23 weeks trial period. The univariate analysis revealed a significant increase (p < 0.05) in the carcass fat content of the Azadirachta indica treatment group as compared to the monensin and Moringa oleifera groups, even as the groups were adjusted for any difference in the initial body weight. On the other hand, the multivariate analyses on the subcutaneous fatty acids showed a significant rise (p < 0.05) in polyunsaturated fatty acids of the monensin treatment group. The Moringa oleifera group resulted in a significant increase (p < 0.05) in monounsaturated fatty acids molar composition. The interaction effect of days-on-trial with lipid pigment absorbance was significantly higher in the negative control group compared to monensin and Azadirachta indica treatment groups. These results indicate that the addition of either Moringa oleifera or monensin reduces carcass fat and improves the unsaturated fatty acid proportion in SA Mutton Merino sheep. Azadirachta indica treatment increased the carcass fat content and the non-essential fatty acid proportion. However, both monensin and Azadirachta indica groups caused limited deposition of carotenoid (or lipid pigment) in the adipose tissue. Queen Elizabeth Commonwealth Scholarship Animal and Wildlife Sciences MSc Agric Animal Science: (Animal nutrition) Unrestricted 2021-06-14T11:53:26Z 2021-06-14T11:53:26Z 2021 2021 Dissertation Olaniyi, MO 2021, Effect of plant extracts used as a methane mitigation additive on carcass fat content and fatty acid composition of South African Merino sheep, MSc dissertation, University of Pretoria, Pretoria, viewed yyyymmdd http://hdl.handle.net/2263/80304 S2021 http://hdl.handle.net/2263/80304 en © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Nutrition-physiology Effect of plant extracts used as a methane mitigation additive on carcass fat content and fatty acid composition of South African Merino sheep |
| title | Effect of plant extracts used as a methane mitigation additive on carcass fat content and fatty acid composition of South African Merino sheep |
| title_full | Effect of plant extracts used as a methane mitigation additive on carcass fat content and fatty acid composition of South African Merino sheep |
| title_fullStr | Effect of plant extracts used as a methane mitigation additive on carcass fat content and fatty acid composition of South African Merino sheep |
| title_full_unstemmed | Effect of plant extracts used as a methane mitigation additive on carcass fat content and fatty acid composition of South African Merino sheep |
| title_short | Effect of plant extracts used as a methane mitigation additive on carcass fat content and fatty acid composition of South African Merino sheep |
| title_sort | effect of plant extracts used as a methane mitigation additive on carcass fat content and fatty acid composition of south african merino sheep |
| topic | UCTD Nutrition-physiology |
| url | http://hdl.handle.net/2263/80304 |