Intramuscular fatty acid profile of feedlot lambs fed concentrates with alternative ingredients
Pilar Gómez-Cortés A , Olalla O. Galisteo A , Carmen Avilés Ramírez B , Francisco Peña Blanco B , Miguel Angel de la Fuente A , Nieves Núñez Sánchez B and Andrés L. Martínez Marín B C
+ Author Affiliations
- Author Affiliations
A Instituto de Investigación en Ciencias de la Alimentación (CSIC-UAM), Nicolás Cabrera, 9. Universidad Autónoma de Madrid, 28049 Madrid, Spain.
B Departamento de Producción Animal, Universidad de Córdoba, Ctra. Madrid-Cádiz km 396, 14071 Córdoba, Spain.
C Corresponding author. Email: pa1martm@uco.es
Animal Production Science 59(5) 914-920 https://doi.org/10.1071/AN17885
Submitted: 19 December 2017 Accepted: 6 March 2018 Published: 17 May 2018
Abstract
The effect of concentrates based on unconventional ingredients on the intramuscular fatty acid profile of lambs was evaluated. A total of 105 lambs were assigned to one of three treatments: Control (concentrate based on cereals and soybean meal like commercial concentrates), Camelina (where 50% of crude protein from soybean meal was replaced by camelina meal), and Fibrous (concentrate based on several fibrous by-products, such as soybean hulls and wheat bran, as well as camelina meal and other unconventional ingredients). After 42 days in feedlot, the lambs were sacrificed, and the fatty acid profile of intramuscular fat was determined by gas chromatography. Total meat lipids (1.25 g/100 g of meat) were not modified by the treatments. The Camelina treatment showed minor effects on the intramuscular fat composition. In contrast, the Fibrous treatment showed the highest contents of trans-11 18 : 1 (vaccenic acid), cis-9 trans-11 18 : 2 (rumenic acid) and α-linolenic acid. Thus, the non-traditional Fibrous concentrate assayed in the present study might improve the meat quality of light lambs from a nutritional point of view.
Additional keywords: alternative feeds, meat composition, sheep.
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