- Volume 22 Issue 6
This study examined the effects of cage rearing system and backyard raising system on fatty acid profile of egg in laying hens during 9 weeks. Two hundred hens, 70-wk-old, Hy-line Brown, were used in this study and fed basal diets. 100 hens, randomly collected from facility, were transferred to cage rearing system and 100 remaining hens were moved to backyard raising system. For overall period, higher unsaturated fatty acid percentages in two different rearing systems than did saturated fatty acid (SFA) were observed. In unsaturated fatty acid compositions, both rearing system showed a higher mono unsaturated fatty acid (MUFA) contents than poly unsaturated fatty acid (PUFA) contents. Egg quality traits of laying hens reared in backyard system had considerably lower contents of SFA and higher contents of MUFA compared with eggs from cage rearing system (P<0.05). In addition, eggs from cage rearing system resulted in a significantly lower n-3 contents and higher n-6:n-3 ratios and CLA contents in comparison with backyard raising system (P<0.05). However, no significant effects of two different rearing systems on PUFA, PUFA:SFA ratio, and n-6 contents were observed during the experimental period. In conclusion, this result suggests that cage rearing system and backyard raising system will play an important role in improving egg production as functional foods.
Cage rearing system;Backyard raising system;Fatty acid profile
- Cherian, G., Holsonbake, T. B., Goeger, M. P., 2002, Fatty acid content and egg components of specialty eggs, Poult. Sci., 81, 30-33. https://doi.org/10.1093/ps/81.1.30
- Folch, J., Lees, M., Sloane-Stanletys, G. H., 1957, A simple method for isolation and purification of total lipids from animal tissues, J. Bio. Chem., 226, 497-507.
- Food and Agriculture Organisation of United States, 2009, FAO, FaoStat, Livestock primary, Available on the Internet, Cited 01.03.2009, http://www.fao.org.
- Hidalgo, A., Rossi, M., Clerici, F., Ratti, S., 2008, A market study on the quality characteristics of eggs from different housing systems, Food Chem., 106, 1031-1038. https://doi.org/10.1016/j.foodchem.2007.07.019
- Huopalahti, R., Lopez-F, R., Anton, M., Schade, R., 2007, Bioactive egg compounds, Springer-Verlag, Heidelberg, 298.
- Jones, S. D., Ma, W., Robinson, F. E., Field, C. J., Clandinin, M. T., 2000, Isomer of conjugated linoleic acid (CLA) are incorporated into egg yolk lipids by CLA-fed laying hens, J. Nutr., 130, 2002-2005. https://doi.org/10.1093/jn/130.8.2002
- Kim, G. H., Park, B. S., 2006, Effects of dietary fats on the changes of egg lipid composition in laying hens, Ann. Anim Resour. Sci., 17, 1-9.
- Kim, H. J., Yoo, J. S., Shin, S. O., Cho, J. H., Chen, Y. J., Huang, Y., Kim, Y. J., Whang, K. Y., Yang, M. S., Kim, D. J., Kim, I. H., 2008, Effects of dietary conjugated linoleic acid (CLA) and oil containing unsaturated fatty acid supplementation on egg production rate and quality in laying hens, Korean J. Poult. Sci., 35, 131-136. https://doi.org/10.5536/KJPS.2008.35.2.131
- Korean Poultry Association, 2012, Supply and demand statistics for livestock products, http://www.poultry.or.kr.
- Lee, K. N., Storkson, J. M., Pariza, M. W., 1995, Dietary conjugated linoleic acid changes fatty acid composition in different tissues by decreasing monounsaturated fatty acids, p.183, In: IFT Annual Meeting Book of Abstracts, Anaheim, CA.
Lopez-Bote, C. J. R., Sanz Arias, R., Rey, A. I., Castano, A., Isabel, B., Thos, J., 1998, Effect of free-range feeding on omega-3 fatty acid and
$\alpha$-tocopherol content and oxidative stability of eggs, Anim. Feed Sci. Technol., 72, 33-40. https://doi.org/10.1016/S0377-8401(97)00180-6
- Matt, D., Veromann, E., Luik, A., 2009, Effect of housing systems on biochemical composition of chicken eggs, Agro Res (Special issue II), 7, 662-667.
- Minelli, G., Sirri, F., Folegatti, E., Meluzzi, A., Franchini, A., 2007, Egg quality traits of laying hens reared in organic and conventional systems, Ital. J. Anim. Sci., 6, 728-730.
- SAS Institute, 2000, SAS User's guide: Statistics, Version 8 edition SAS Institute Inc., Cary, NC, USA.
- Ternes, W., Leitsch, S., 1997, Chemistry of egg yolk. In: Proceedings of the VII European Symposium on the Quality of Eggs and Egg Products. Poznan, Poland. WPSA Polish branch, Poznan, Poland, 127-144.