Effect of rearing system on carcass properties, chemical content and fatty acid composition of backfat from Mangalitsa pigs

Abstract

This research examined the effects of two rearing systems (conventional versus free-range) on carcass characteristics, and cholesterol content, chemical and fatty acid properties of the backfat from Mangalitsa pigs. Depending on the rearing system utilized and live weight observed, we found important differences in the heaviness of the cold and warm Mangalitsa carcasses. The maximum total cholesterol in the backfat of pigs reared outdoors was 46.96 mg kg-1, while the maximum total cholesterol in backfat of conventionally-raised Mangalitsa pigs was 55.80 mg kg-1. The backfat from free-ranging Mangalitsa pigs contained lower levels of PUFA n-6 and greater amounts of PUFA n-3. The ratio of PUFA/SFA was remarkably different in pigs raised in the two systems, whereas the ratio of MUFA/SFA was lower in the pigs reared outdoors. Based on these results, the selection of rearing system could affect the chemical properties and carcass characteristics of Mangalitsa backfat.

Cilj ovog rada bio je uticaj dva sistema gajenja (konvencionalni i slobodni uzgoj) na karakteristike trupa, kao i na sadržaj holesterola, hemijski sastav i sadržaj masnih kiselina leđne masnoće Mangulica. U zavisnosti od sistema gajenja i posmatrane telesne mase, utvrđene su značajne razlike u masi hladnih i toplih polutki Mangalica. Maksimalni ukupni holesterol u masnoć i svinja koje se gajene u slobodnom sistemu uzgoja bio je 46,96 mg kg⁻1, dok je maksimalni ukupni holesterol u masnoć i konvencionalno uzgajanih Mangalica bio 55,80 mg kg⁻1. Masnoć a Mangalica koja je gajena u slobodnom sistemu imala je manji sadržaj PUFA n-6 i već i sadržaj PUFA n-3. Odnos PUFA / SFA bio je izuzetno različit kod svinja koje su gajane u dva sistema, dok je odnos MUFA / SFA bio manji kod svinja koje su gajane u slobodnom sistemu. Na osnovu ovih rezultata, izbor sistema za uzgoj svinja mogao bi da utiče na hemijska svojstva i karakteristike trupa Mangalica.