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Alpine vegetation type affects composition of nutritionally important C18 fatty acids in tissues of lambs from different breeds

Willems, H.; Kreuzer, M. and Leiber, F. (2013) Alpine vegetation type affects composition of nutritionally important C18 fatty acids in tissues of lambs from different breeds. In: Lombardi, G.; Mosimann, E.; Golier, A.; Iussig, G.; Lonati, M.; Pittarello, M. and Probo, M. (Eds.) Proceedings of the 17th Meeting of the FAO‐CIHEAM Mountain Pasture Network ‐ Pastoralism and ecosystem conservation, pp. 37-39.

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Summary

A total of 110 lambs of the breeds Engadine Sheep and Valaisian Black Nose Sheep were fattened on one lowland and three different alpine pasture types. The experiment was conducted in two consecutive years and lasted for 9 weeks of grazing in each year. Immediately afterwards, the lambs were slaughtered.
Perirenal adipose tissue and the Longissimus dorsi muscle were analysed for fatty acid composition. The lambs on the lowland pasture had the lowest proportions of linoleic and α-linolenic acid in the lipid fraction of these tissues. Additionally, there was a clear differentiation in these proportions when lambs grazed different alpine vegetation types. This was related to the content of phenolic compounds rather than the fatty acid contents of the swards, and an increasing phenolic level probably resulted in a higher ruminal protection of the native plant fatty acids. Intermediates of biohydrogenation (vaccenic acid and conjugated linoleic acid) were highest in the lowland lambs. Animal breed effects were weak.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:lamps, Engadine Sheep, alpine vegetation, lowland, alpine pasture
Subjects: Animal husbandry > Feeding and growth
Animal husbandry > Production systems > Sheep and goats
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Animal Husbandry and Breeding
Switzerland > ETHZ - Agrarwissenschaften
Deposited By: Leiber, Dr. Florian
ID Code:25179
Deposited On:25 Feb 2014 21:36
Last Modified:25 Feb 2014 21:36
Document Language:English
Status:Published
Refereed:Not peer-reviewed

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