Effect of transport length on in vivo oxidative status and breast meat characteristics in outdoor-reared chicken genotypes. Issue 2 (2nd April 2016)

• Record Type: Journal Article
• Authors: Castellini, Cesare; Mattioli, Simona; Piottoli, Luca; Cartoni Mancinelli, Alice; Ranucci, David; Branciari, Raffaella; Guarino Amato, Monica; Dal Bosco, Alessandro
• Is Part Of: Italian journal of animal science. Volume 15:Issue 2(2016)
• Page Start: 191
• Page End: 199
• Publication Date: 2016-04-02
• Subjects: Chicken genotype -- meat quality -- oxidative status -- transport -- welfare; Animal culture -- Periodicals; Livestock -- Italy -- Periodicals; Veterinary medicine -- Italy -- Periodicals; Animal culture; Livestock; Veterinary medicine; Italy; Periodicals; Periodicals; 636.005
• DOI: Http://www.tandfonline.com/doi/10.1080/1828051X.2016.1174082
• Languages: English
• ISSNs: 1828-051X

Abstract

Abstract: The aim of the study was to evaluate the effect of transport length on in vivo oxidative status and breast meat characteristics in two chicken genotypes reared under free range conditions. A total of 200 male chicks, 100 from fast-growing (Ross 308) and 100 from medium-growing (Naked Neck) strain were used. Fifty-six of these, 28 for genotype, before slaughtering, were randomly allocated to 2 pre-slaughter conditions: absence (0 h) or 4 h of transport. The transport length significantly affected the in vivo oxidative status of broiler greatly reducing the α and δ-tocopherol, retinol and lutein + zeaxanthin content of plasma, and increased the oxidative stress (thiobarbituric acid reactive substances, TBARS) in both strains. Concerning meat quality, the pH (0, 2 and 24 h post-mortem ) of breast muscles of chickens transported for 4 h, showed higher values, and respect to strains, Naked Neck had lower values. The pH values were negatively correlated with the lightness (2–24 h) and the shear force of meat. The transport length significantly affected the fatty acid profile of breast muscle, with a decrease in polyunsaturated fatty acids and an increase in TBARS value. Even the antioxidants content of breast was reduced by chicken transport (α-tocotrienol, α-, δ-tocopherol and lutein + zeaxanthin), especially in Naked Neck birds. In conclusion, the results indicate that transport for 4 h prior to slaughter, negatively affect the meat quality of poultry. Slow-growing chickens seem more sensible to stress transport due to the higher kinetic behaviour of these strains.