Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Effect of Conjugated Linoleic Acid Feeding on the Growth Performance and Meat Fatty Acid Profiles in Broiler: Meta-analysis

  • Cho, Sangbuem (Department of Animal Science, Chonbuk National University) ;
  • Ryu, Chaehwa (Department of Animal Science, Chonbuk National University) ;
  • Yang, Jinho (Department of Animal Science, Chonbuk National University) ;
  • Mbiriri, David Tinotenda (Department of Animal Science, Chonbuk National University) ;
  • Choi, Chang-Weon (Department of Animal Resource, Daegu University) ;
  • Chae, Jung-Il (Department of Dental Pharmacology, Chonbuk National University) ;
  • Kim, Young-Hoon (Department of Animal Science, Chonbuk National University) ;
  • Shim, Kwan-Seob (Department of Animal Biotechnology, Chonbuk National University) ;
  • Kim, Young Jun (Department of Food and Biotechnology, Korea University) ;
  • Choi, Nag-Jin (Department of Animal Science, Chonbuk National University)
  • Received : 2013.01.29
  • Accepted : 2013.03.12
  • Published : 2013.07.01
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Abstract

The effect of conjugated linoleic acid (CLA) feeding on growth performance and fatty acid profiles in thigh meat of broiler chicken was investigated using meta-analysis with a total of 9 studies. Overall effects were calculated by standardized mean differences between treatment (CLA fed) and control using Hedges's adjusted g from fixed and random effect models. Meta-regression was conducted to evaluate the effect of CLA levels. Subgroups in the same study were designated according to used levels of CLA, CP levels or substituted oils in diets. The effects on final body weight, weight gain, feed intake and feed conversion ratio were investigated as growth parameters. Total saturated and unsaturated fatty acid concentrations and C16:0, C18:0, C18:2 and C18:3 concentrations in thigh meat of broiler chicken were used as fatty acid profile parameters. The overall effect of CLA feeding on final weight was negative and it was only significant in fixed effect model (p<0.01). Significantly lower weight gain, feed intake and higher feed conversion ratio compared to control were found (p<0.05). CLA feeding on the overall increased total saturated fatty acid concentration in broilers compared to the control diet (p<0.01). Total unsaturated fatty acid concentration was significantly decreased by CLA feeding (p<0.01). As for individual fatty acid profiles, C16:0, C18:0 and C18:3 were increased and C18:2 was significantly decreased by CLA feeding (p<0.01). In conclusion, CLA was proved not to be beneficial for improving growth performance, whereas it might be supposed that CLA is effective modulating n-6/n-3 fatty acids ratio in thigh meat. However, the economical compensation of the loss from suppressed growth performance and increased saturated fatty acids with the benefit from enhanced n-6/n-3 ratio should be investigated in further studies in order to propose an appropriate use of dietary CLA in the broiler industry.

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References

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