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- Title
Biochemical profiles and physicochemical parameters of beef from cattle raised under contrasting feeding systems and pre-slaughter management.
- Authors
Pighin, D. G.; Davies, P.; Pazos, A. A.; Ceconi, I.; Cunzolo, S. A.; Mendez, D.; Buffarini, M.; Grigioni, G.
- Abstract
Diet and pre-slaughter stress are key factors that may affect the biochemical processes during conversion of muscle into meat. The aim of the present study was to evaluate the effect of two different pre-slaughter stress managements (PSM) at a slaughterhouse in Angus steers raised and finished in two contrasting feeding systems (FS grain and pasture systems), on the peri mortem muscle metabolism, and its relation to of meat quality. Results obtained showed that a higher level of pre-slaughter stress increased (P < 0.05) glucose, lactate and proteins blood levels and decreased (P < 0.05) the redness (a* parameter) of adipose tissue. Regarding feeding strategy, pasture-fed animals displayed increased (P < 0.05) levels of haematocrit and insulin concentrations, and higher (P < 0.05) muscle pH decrease during the first 3 h post mortem. Despite final pH (pH 24 h) of M. longissimus dorsi (LD) was not significantly modified, LD hardness was significantly affected by an interaction effect of FS and PSM. Lower pre-slaughter stress level led to a decrease (P < 0.05) of LD hardness in grain-fed animals. In general terms, results showed an impact of PSM and FS on meat quality through pH-independent mechanisms. Animal diet and pre mortem handling may affect the biochemical conversion of muscle into meat. The aim of the present study was to evaluate the effect of two different pre-slaughter handling in Angus steers raised and finished in two contrasting feeding systems on the muscle metabolism and the related meat quality. The results obtained showed an impact of pre-slaughter handling and feeding systems on the peri mortem biochemistry and in the related meat quality through pH-independent mechanisms.
- Subjects
EFFECT of stress on livestock; SLAUGHTERING; BEEF cattle feeding &; feeds; MUSCLE physiology; MEAT quality
- Publication
Animal Production Science, 2015, Vol 55, Issue 10, p1310
- ISSN
1836-0939
- Publication type
Article
- DOI
10.1071/AN13378