Is a short concentrate-finishing period in lambs raised on alfalfa pasture effective at reducing fat indoles contents and lightening meat colour?
Pasture-feeding in lambs has been associated with dark-coloured meat and high meat contents of volatile indoles (skatole and indole), which may be responsible for sensory defects. The risk of off-flavours is even higher when lambs graze alfalfa, because it is particularly rich in rapidly degradable...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-08-01
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| Series: | Animal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S175173112200163X |
| _version_ | 1811340425690087424 |
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| author | Carlos Emanuel Eiras Armelle Prunier Karine Meteau Ivanor Nunes do Prado Sophie Prache |
| author_facet | Carlos Emanuel Eiras Armelle Prunier Karine Meteau Ivanor Nunes do Prado Sophie Prache |
| author_sort | Carlos Emanuel Eiras |
| collection | DOAJ |
| description | Pasture-feeding in lambs has been associated with dark-coloured meat and high meat contents of volatile indoles (skatole and indole), which may be responsible for sensory defects. The risk of off-flavours is even higher when lambs graze alfalfa, because it is particularly rich in rapidly degradable proteins. Here, we investigated whether a short concentrate stall-finishing period in lambs that previously grazed alfalfa influences meat sensory quality traits. We compared three feeding treatments, using three groups of 10 male Romane lambs: grazing alfalfa (A), stall-feeding with concentrate and straw (S), and stall-finishing with concentrate and straw for 21 days after previously grazing alfalfa (AS). During stall-feeding, the concentrate was given at a level adjusted to achieve a similar growth pattern in all treatment groups, and the length of the trough was sufficient for all lambs to have access to the feeds at the same time. Lamb live weight and age at slaughter, and carcass conformation and fatness were similar for all treatment groups. Perirenal fat skatole content was lower in AS and S lambs than in A lambs (P < 0.001 and P < 0.05, respectively), and not significantly different between AS and S lambs. Perirenal fat indole and dorsal fat skatole concentrations were lower in AS lambs than in A lambs (P < 0.05 and P < 0.005, respectively), the other pairwise comparisons being not significant. There was no treatment effect on dorsal fat indole content. Longissimus et lumborum muscle colour coordinates differed between pasture-fed and stall-fed lambs, with a lower lightness (P < 0.005) and greater redness and hue angle (P < 0.001 and P < 0.01, respectively) in pasture-fed lambs, but muscle colour coordinates did not differ between A and AS lambs. A 21-d concentrate-based stall-finishing period in lambs previously raised on alfalfa pasture therefore markedly reduced fat indoles concentrations compared to lambs grazed on alfalfa until slaughter but did not change meat colour. |
| first_indexed | 2024-04-13T18:41:44Z |
| format | Article |
| id | doaj.art-801d393a7c6d46b9b5cac7cf02145e9d |
| institution | Directory Open Access Journal |
| issn | 1751-7311 |
| language | English |
| last_indexed | 2024-04-13T18:41:44Z |
| publishDate | 2022-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Animal |
| spelling | doaj.art-801d393a7c6d46b9b5cac7cf02145e9d2022-12-22T02:34:42ZengElsevierAnimal1751-73112022-08-01168100610Is a short concentrate-finishing period in lambs raised on alfalfa pasture effective at reducing fat indoles contents and lightening meat colour?Carlos Emanuel Eiras0Armelle Prunier1Karine Meteau2Ivanor Nunes do Prado3Sophie Prache4Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 St-Genès-Champanelle, France; Universidade Estadual de Maringá, UEM, Av. Colombo 5.790, CEP 87020-900 Maringá, PR, BrazilINRAE, UMR Physiologie, Environnement et Génétique pour l’Animal et les Systèmes d’Elevage, F-35590 St-Gilles, FranceINRAE, UE Elevage Alternatif et Santé des Monogastriques, Le Magneraud, F-17700 St-Pierre-d’Amilly, FranceUniversidade Estadual de Maringá, UEM, Av. Colombo 5.790, CEP 87020-900 Maringá, PR, BrazilUniversité Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 St-Genès-Champanelle, France; Corresponding author.Pasture-feeding in lambs has been associated with dark-coloured meat and high meat contents of volatile indoles (skatole and indole), which may be responsible for sensory defects. The risk of off-flavours is even higher when lambs graze alfalfa, because it is particularly rich in rapidly degradable proteins. Here, we investigated whether a short concentrate stall-finishing period in lambs that previously grazed alfalfa influences meat sensory quality traits. We compared three feeding treatments, using three groups of 10 male Romane lambs: grazing alfalfa (A), stall-feeding with concentrate and straw (S), and stall-finishing with concentrate and straw for 21 days after previously grazing alfalfa (AS). During stall-feeding, the concentrate was given at a level adjusted to achieve a similar growth pattern in all treatment groups, and the length of the trough was sufficient for all lambs to have access to the feeds at the same time. Lamb live weight and age at slaughter, and carcass conformation and fatness were similar for all treatment groups. Perirenal fat skatole content was lower in AS and S lambs than in A lambs (P < 0.001 and P < 0.05, respectively), and not significantly different between AS and S lambs. Perirenal fat indole and dorsal fat skatole concentrations were lower in AS lambs than in A lambs (P < 0.05 and P < 0.005, respectively), the other pairwise comparisons being not significant. There was no treatment effect on dorsal fat indole content. Longissimus et lumborum muscle colour coordinates differed between pasture-fed and stall-fed lambs, with a lower lightness (P < 0.005) and greater redness and hue angle (P < 0.001 and P < 0.01, respectively) in pasture-fed lambs, but muscle colour coordinates did not differ between A and AS lambs. A 21-d concentrate-based stall-finishing period in lambs previously raised on alfalfa pasture therefore markedly reduced fat indoles concentrations compared to lambs grazed on alfalfa until slaughter but did not change meat colour.http://www.sciencedirect.com/science/article/pii/S175173112200163XFlavourLamb sensory qualityMeat colourPasture-feedingSkatole |
| spellingShingle | Carlos Emanuel Eiras Armelle Prunier Karine Meteau Ivanor Nunes do Prado Sophie Prache Is a short concentrate-finishing period in lambs raised on alfalfa pasture effective at reducing fat indoles contents and lightening meat colour? Animal Flavour Lamb sensory quality Meat colour Pasture-feeding Skatole |
| title | Is a short concentrate-finishing period in lambs raised on alfalfa pasture effective at reducing fat indoles contents and lightening meat colour? |
| title_full | Is a short concentrate-finishing period in lambs raised on alfalfa pasture effective at reducing fat indoles contents and lightening meat colour? |
| title_fullStr | Is a short concentrate-finishing period in lambs raised on alfalfa pasture effective at reducing fat indoles contents and lightening meat colour? |
| title_full_unstemmed | Is a short concentrate-finishing period in lambs raised on alfalfa pasture effective at reducing fat indoles contents and lightening meat colour? |
| title_short | Is a short concentrate-finishing period in lambs raised on alfalfa pasture effective at reducing fat indoles contents and lightening meat colour? |
| title_sort | is a short concentrate finishing period in lambs raised on alfalfa pasture effective at reducing fat indoles contents and lightening meat colour |
| topic | Flavour Lamb sensory quality Meat colour Pasture-feeding Skatole |
| url | http://www.sciencedirect.com/science/article/pii/S175173112200163X |
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