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Meat Sci. 2012 Jan;90(1):93-8. doi: 10.1016/j.meatsci.2011.06.009. Epub 2011 Jun 12.

Effect of morning vs. afternoon grazing on intramuscular fatty acid composition in lamb.

Author information

1
University of Catania, DISPA, Sezione di Scienze delle Produzioni Animali, Via Valdisavoia 5, 95123 Catania, Italy. vvasta@unict.it

Abstract

The aim of this study was to assess whether different grazing management affect animal performance and meat fatty acid composition. Thirty-five lambs were divided into three groups: 12 lambs grazed from 9 am to 5 pm (8 h group); 11 lambs grazed from 9 am to 1 pm (4hAM group) and 12 lambs grazed from 1 pm to 5 pm (4hPM group). The trial was conducted over 72 days. The 8 h lambs had greater DMI (P<0.0005) and final body weight (P<0.05) than the 4hPM and 4hAM lambs while carcass weight was not different between the three groups. The meat of the 4hPM lambs contained greater (P<0.05) percentages of polyunsaturated fatty acids, C18:2 cis-9 trans-11 and lower saturated fatty acids and C18:0 than the meat of the 8 h and 4hAM lambs. It is concluded that allowing lambs to graze during the afternoon rather than during 8 h does not compromise the carcass yield and results in a healthier meat fatty acid profile.

PMID:
21700399
DOI:
10.1016/j.meatsci.2011.06.009
[Indexed for MEDLINE]

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