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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Relationship between pre-slaughter stress responsiveness and beef quality in three cattle breeds
Meat Science, Volume 81, No. 4, Year 2009
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Description
The relationship between stress responsiveness and beef quality of 40 Nguni, 30 Bonsmara and 30 Angus steers was determined. The L* values, pHu, cooking loss (CL) and Warner-Bratzler shear force (WBSF) were determined. Catecholamine levels were determined from urine samples collected at slaughter. Bonsmara steers had the highest (P < 0.05) levels of catecholamines with respective epinephrine, norepinephrine and dopamine concentrations of 10.8, 9.7 and 14.8 nmol/mmol. Nguni steers had the lowest (P < 0.05) levels of catecholamines, with respective catecholamine concentrations of 5.1, 4.3 and 4.0 nmol/mmol. In the Nguni steers, there were significant (P < 0.05) correlations between catecholamines and L* and between dopamine and tenderness in meat aged for two days (WBSF2). In the Bonsmara, dopamine was correlated (P < 0.05) pHu, WBSF2 and CL. No significant correlations were found in the Angus. Therefore the relationship between stress responsiveness and certain beef quality traits may not be similar in different breeds. © 2008 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Muchenje, Voster
South Africa, Alice
University of Fort Hare
Dzama, Kennedy
South Africa, Stellenbosch
Stellenbosch University
Chimonyo, Michael
South Africa, Alice
University of Fort Hare
Strydom, Phillip E.
South Africa, Pretoria
Agricultural Research Council, Pretoria
Raats, Jan G.
South Africa, Alice
University of Fort Hare
Statistics
Citations: 150
Authors: 5
Affiliations: 3
Identifiers
Doi:
10.1016/j.meatsci.2008.11.004