The effect of feed restriction on the fat profile of Santa Inês lamb meat

Abstract

Consumers today are increasingly more demanding regarding their food, seeking healthier and better quality products, and in this context animal nutrition plays a key role. The meat composition can be altered by animal feed itself, being that lipid profile may directly contribute to consumer health, reducing the predisposition of developing cardiovascular diseases, main cause of mortality in the world. Thus, the aim of this study was to assess the effect of dietary feed restriction in Santa Inês lambs on their intramuscular, intermuscular, and subcutaneous fat profile, fat profile of the longissimus thoracis et lumborum (LTL) muscle, and the total meat lipids and cholesterol. Three groups of lambs were subjected to diets: without restriction (WR), and 30 and 60% feed restriction. Overall, stearic, palmitic, and oleic acids were the predominant and the lowest lipid and cholesterol levels were observed at the highest restriction level, presenting higher polyunsaturated:saturated (PUFA:SFA) and desirable (DFA) fatty acid ratios (p < 0.05). Lambs subjected to 60% dietary feed restriction had a better quality meat with lower lipid and cholesterol contents, and profile favorable for human health due the presence of unsaturated fatty acids, that is important parameter the market demands to meet the consumers’ expectations.

Effects of Roughage Quality and Particle Size on Rumen Parameters and Fatty Acid Profiles of Longissimus Dorsi Fat of Lambs Fed Complete Feed

“…The AI value in our study was lower (0.95) in T2 with 1 cm alfalfa than in other treatments. This value for AI was similar to that found by Madruga et al [ 49 ] and lower than that reported by Costa et al [ 50 ] in Santa Inês lamb meat. Thus, the meat fat of the animals fed TMR and alfalfa is considered ideal for human consumption owing to its health benefits, such as the prevention of atherogenic and thrombogenic effects.…”

Technologies Used in Production Systems for Santa Inês Sheep: A Systematic Review

“…Some authors have studied feed restriction as a strategy that could benefit carcass quality and reduce system costs. Feed restriction of up to 60% does not affect carcass yield in sheep ( 121 ), improving meat quality and lipid profile ( 122 ). However, Campos et al ( 111 ) recommend a lower dietary restriction (30%).…”

Influence of tannic acid on milk lipid composition of cows

“…About 70% of the fatty acids in milk triacylglycerols are saturated, 25% are monounsaturated fatty acids (MUFA), and 5% are polyunsaturated fatty acids (PUFA) (Lopes et al, 2016;Abd El-Salam & El-Shibiny, 2020). Studies have shown nutritional components of milk fat, with an emphasis on conjugated linoleic acid (CLA), which consists of a group of fatty acids found predominantly in the milk (Agiral et al, 2020) and meat of ruminant animals, such as cows' (Ruiz et al, 2016), sheep (Nudda et al, 2014, Madruga et al, 2020, and goat (Apás et al, 2015). In milk, fatty acids can come from the diet, transported to the mammary gland or synthesized by the mammary epithelial cells (Vargas-Bello-Perez et al, 2020).…”