Fatty acid profile in the ruminal fluid and in the m. longissimus dorsi of lambs fed herbage or concentrate with or without tannins

Valentina Vasta, Marcello Mele, Andrea Serra, Giuseppe Luciano, Manuel Scerra, Massimiliano Lanza, Alessandro Priolo
  • Marcello Mele
    Affiliation not present
  • Andrea Serra
    Affiliation not present
  • Giuseppe Luciano
    Affiliation not present
  • Manuel Scerra
    Affiliation not present
  • Massimiliano Lanza
    Affiliation not present
  • Alessandro Priolo
    Affiliation not present

Abstract

Twenty-eight male lambs were divided into two groups at age 45 d. Fourteen lambs were given fresh herbage (vetch); the remaining lambs were fed a concentrate-based diet. Within each treatment, seven lambs received a supplementation of quebracho tannins. At slaughter (age 105 d) the ruminal content and the muscle longissimus dorsi (LD) were collected. Ruminal fluid and LD fatty acid composition was determined by gas chromatography. Among the concentrates-fed lambs, tannins supplementation reduced (P < 0.05) the concentration of C18:0 (- 49 %) and increased vaccenic acid (VA; + 69 %) in the ruminal fluid. When tannins were included into the concentrate, the LD contained double levels of rumenic acid (RA) as compared to the LD of the lambs fed the tannins-free concentrate (0.96 vs. 0.46 % of total extracted fatty acids, respectively; P < 0.05). The concentration of PUFA was higher (P < 0.05) and SFA (P < 0.01) lower in the LD from lambs fed the tannin diets as compared to the animals receiving the tannin-free diets. In conclusion, tannins reduce the biohydrogenation of the PUFA in the rumen. This implies that tannins supplementation could be a strategy to increase the RA and PUFA content and to reduce the SFA into ruminant meats.

Keywords

Conjugated linoleic acid, Fatty acids, Lamb, Tannins

Full Text

Full Text PDF
Submitted: 2010-01-12 11:04:59
Published: 2010-01-12 11:05:06
Search for citations in Google Scholar
Related articles: Google Scholar

Article Metrics

Metrics Loading ...

Metrics powered by PLOS ALM


 

 

The Italian Journal of Animal Science [eISSN 1828-051X] is the official journal of the Animal Science and Production Association and it is published by PAGEPress®, Pavia, Italy. Reg. Pavia, n. 2/2010-INF. All credits and honors to PKP for their OJS.
 
 
© PAGEPress 2008-2015     -     PAGEPress is a registered trademark property of PAGEPress srl, Italy.     -     VAT: IT02125780185