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Volume 59, issue 1
Arch. Anim. Breed., 59, 121-129, 2016
https://doi.org/10.5194/aab-59-121-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Arch. Anim. Breed., 59, 121-129, 2016
https://doi.org/10.5194/aab-59-121-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Original study 01 Mar 2016

Original study | 01 Mar 2016

The effect of feeding system on slaughter-carcass characteristics, meat quality, and fatty acid composition of lambs

Serhat Karaca1, Ayhan Yılmaz2, Aşkın Kor1, Mehmet Bingöl1, İsa Cavidoğlu3, and Gazel Ser1 Serhat Karaca et al.
  • 1Department of Animal Sciences, Faculty of Agriculture, Yuzuncu Yıl University, 65080 Van, Turkey
  • 2Department of Animal Sciences, Faculty of Agriculture, Siirt University, 56100 Siirt, Turkey
  • 3Department of Food Engineering, Faculty of Engineering and Architecture, Yuzuncu Yıl University, 65080 Van, Turkey

Abstract. In this study, we aimed to determine the slaughter-carcass characteristics, meat quality, and fatty acid composition in lambs raised under intensive and extensive conditions. The animal material consisted of 30 Norduz male lambs, with an average age of 171 days. The lambs were divided into two groups: concentrate-fed lambs (CO) and pasture-fed lambs (PS). The results showed that the CO lambs had heavier carcasses (p< 0.001), a higher dressing percentage (p< 0.001), and higher intramuscular fat (p< 0.01) than the PS lambs. It was determined that the longissimus thoracis muscle of the CO lambs had a lower ultimate pH and higher L* and water-holding capacity than the PS lambs. In this study, intramuscular fat (longissimus thoracis, semimembranosus, triceps brachii), subcutaneous and tail fat samples were used to evaluate the effect of feeding system on fatty acid composition. The polyunsaturated fatty acid to saturated fatty acid ratio (PUFASFA) of intramuscular fat was found to be significantly higher in the CO group than in the PS lambs, while similar subcutaneous and tail fat results were found in both groups. Moreover, the PS lambs had a lower n6n3 ratio and higher percentage of omega-3 than the CO lambs in all tissues studied (p< 0.05). Overall, the CO lambs have heavier and fattier carcasses with better meat quality traits than the PS lambs. However, the effects of feeding system have varying results based on the fatty acid composition of different types of fat deposits.

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The results of this study indicate that the feeding system (concentrate vs. pasture) affected meat quality and fatty acid composition in lambs. Both rearing systems have advantages and disadvantages. Feeding with concentrate rations led to a better fattening performance and meat quality, whereas omega-3 content was high in pasture-reared lambs. Further research is necessary to explore the optimum combination of these feeding systems.
The results of this study indicate that the feeding system (concentrate vs. pasture) affected...
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