Fatty acid profile of plasma, muscle and adipose tissues in C hilota lambs grazing on two different low quality pasture types in C hiloé A rchipelago ( C hile)

• Published in: Animal science journal 2014-11, Vol.85 (11), p.935-941
• Main Authors: Gallardo, Maria A., Dannenberger, Dirk, Rivero, Jordana, Pulido, Ruben, Nuernberg, Karin
• Format: Article
• Language: English
• ISSN: 1344-3941; 1740-0929
• DOI: 10.1111/asj.12227

There is no information about the effect of different pasture types on tissue fatty acid profiles of a native rustic lamb breed of the C hiloe A rchipelago, the C hilota. Eight C hilota lambs were grazed on a ‘ C alafatal’ pasture ( CP ), a typical secondary succession of C hiloé A rchipelago ( C hile) and eight C hilota lambs were located to graze on naturalized pasture ( NP ) of C hiloé. Botanical, chemical and lipid composition of the two types of pastures and of different lamb tissues (muscle, subcutaneous – and tail adipose tissues) and plasma were performed. Both pasture types induced high n ‐3 polyunsaturated fatty acids ( PUFA ) and CLA cis ‐9, trans ‐11 proportions in C hilota meat. Thus, in muscle, C hilota lambs grazing CP showed higher sum PUFA , sum n ‐6 PUFA proportion and n ‐6/ n ‐3 PUFA ratio compared with C hilota lambs grazing NP . In tail fats of C hilota lambs grazing CP significantly higher proportions of 18:3 n ‐3, sum saturated fatty acids, sum PUFA , n ‐3 and n ‐6 PUFA were detected compared with C hilota lambs grazing NP . Feeding of different pasture types ( CP   vs.   NP ) caused significant differences in fatty acid composition of muscle and the two fat depots in C hilota lambs, but also point to tissue‐specific responses of de novo synthesized fatty acid deposition in the tissues.