Effect of production system on fatty acid composition in subcutaneous adipose tissue of Ile de France lambs

A study was conducted on the effect of two different lamb production systems on the fatty acid (FA) composition of subcutaneous fat of 40 purebred Ile de France lambs. In the first production system, ewes and lambs grazed on pasture without concentrate (GS), whereas in the second production system, ewes and lambs were housed indoor and fed silage/hay and concentrate (IS). Twenty lambs (7 females and 13 males) were included in each group. Lambs were slaughtered at 28.75 ± 2.76 kg. The FA were determined by gas chromatography and analysed through ANOVA by considering the following fixed effects: production system, sex and the interaction between production system and sex. Subcutaneous fat of GS lambs had greater proportion of C18:3n-3 (P <0.001), C22:5n-3 (P <0.05) and C22:6n-3 (P <0.05) than IS lambs, which resulted in a higher sum of n-3 polyunsaturated FA in GS compared to IS lambs (2.00 vs. 1.15 g/100 g FAME, P <0.001). Moreover, subcutaneous fat of GS lambs had greater proportion of c9,t11-C18:2 (P <0.001) and sum of detected conjugated linoleic acid isomers than IS lambs (2.21 vs. 0.67 g/100 g FAME, P <0.001). Females had significantly greater proportion of C18:2n-6 (P <0.05) and C18:3n-6 (P <0.001) than males. We can conclude that the GS system where lambs are raised under grazing conditions may provide carcasses with a more acceptable subcutaneous fat, as far as a human health and nutrition perspective is concerned.

[1]  R. Kubinec,et al.  Fatty acids in intramuscular fat of Ile de France lambs in two different production systems , 2018, Archives animal breeding.

[2]  A. C. Feihrmann,et al.  Lipid composition and sensory traits of meat from Pantaneiro lambs slaughtered with different subcutaneous fat thickness , 2016 .

[3]  G. Ser,et al.  The effect of feeding system on slaughter-carcass characteristics, meat quality, and fatty acid composition of lambs , 2016 .

[4]  A. Simopoulos.  An Increase in the Omega-6/Omega-3 Fatty Acid Ratio Increases the Risk for Obesity , 2016, Nutrients.

[5]  Valerie R. Johnson,et al.  Red meats: time for a paradigm shift in dietary advice. , 2014, Meat science.

[6]  K. Petrotos,et al.  Volatile compound profile of ewe's milk and meat of their suckling lambs in relation to pasture vs. indoor feeding system , 2012 .

[7]  D. Corpet.  Red meat and colon cancer: should we become vegetarians, or can we make meat safer? , 2011, Meat science.

[8]  G. Zervas,et al.  The effect of feeding systems on the characteristics of products from small ruminants , 2011 .

[9]  G. Luciano,et al.  Influence of stall finishing duration of Italian Merino lambs raised on pasture on intramuscular fatty acid composition. , 2011, Meat science.

[10]  C. Loureiro,et al.  Características nutricionais da carne de cordeiros terminados com dietas contendo cana-de-açúcar ou silagem de milho e dois níveis de concentrado , 2011 .

[11]  M. McGuire,et al.  Documentation of fatty acid profiles in lamb meat and lamb-based infant foods. , 2011, Journal of food science.

[12]  M. Mele,et al.  Comparison of fatty acid profile in lamb meat and baby food based on lamb meat , 2009 .

[13]  A. Mullen,et al.  Estimation of factors influencing fatty acid profiles in light lambs. , 2008, Meat science.

[14]  A. Fisher,et al.  Fat deposition, fatty acid composition and meat quality: A review. , 2008, Meat science.

[15]  M. A. Oliver,et al.  Fatty acid composition of meat from typical lamb production systems of Spain, United Kingdom, Germany and Uruguay. , 2005, Meat science.

[16]  D. Micol,et al.  Effect of grass or concentrate feeding systems and rate of growth on triglyceride and phospholipid and their fatty acids in the M. longissimus thoracis of lambs. , 2004, Meat science.

[17]  R. Bessa,et al.  Effect of genotype, feeding system and slaughter weight on the quality of light lambs: II. Fatty acid composition of meat , 2002 .

[18]  R. G. Ackman.  The gas chromatograph in practical analyses of common and uncommon fatty acids for the 21st century , 2002 .

[19]  J. González,et al.  Use of concentrate or pasture for fattening lambs and its effect on carcass and meat quality , 2002 .

[20]  T. Popova.  Fatty acid composition of Longissimus dorsi and Semimembranosus muscles during storage in lambs reared indoors and on pasture , 2014 .

[21]  A. Aktumsek,et al.  Effect of feeding regime on fatty acid composition of Longissimus dorsi muscle and subcutaneous adipose tissue of Akkaraman lambs. , 2011 .

[22]  A. J. McAfee,et al.  Red meat consumption: an overview of the risks and benefits. , 2010, Meat science.

[23]  Z. Parissi,et al.  Performance, carcass characteristics and meat quality of Timahdite-breed lambs finished on pasture or on hay and concentrate , 2009 .

[24]  G. Nuernberg,et al.  Meat quality and fatty acid composition of lipids in muscle and fatty tissue of Skudde lambs fed grass versus concentrate , 2008 .

[25]  A. Potkański,et al.  Effects of different amounts and types of fat on fatty acid composition of fat deposit in lambs Vliv různého množství a druhu tuku na složení mastných kyselin v depotním tuku u jehňat , 2002 .