Comparison of chemical composition of eggs from laying hens housed in different production facilities: a market study
Keywords:eggs, laying hens, housing, elemental analysis, proteins
Eggs as a part of human diet dates to the prehistoric period. After the domestication of Gallus species, Gallus gallus domesticus and their eggs spread across the globe. Eggs proved to be one of the best and affordable sources of nutritionally important components in human diet, such as proteins, vitamins, lipids and some dietary significant elements. Progress in egg production methods, in European union, is recently mostly focused on the improvements in the field of welfare of laying hens, which is part of the plan set by European union council directive 1999/74/EC. Nowadays there are 4 main egg production systems divided by the way of keeping laying hens - Enriched cage, Free range, Barn and Organic. The aim of this study was to evaluate the impact of different hens housing systems on elemental (Ca, K, Mg, Na, P, Ca, K, Zn), total protein and lipid composition of whole eggs, yolk and albumen. Elemental analysis was performed by ICP-OES, total lipid content by Kjehldahl method and total lipids by Soxhlet extraction. Differences in whole egg were found in 8 from 9 tested parameters - K, Mg, Ba, Fe, P, Zn, total lipids and proteins. Assessment of the differences were done by ANOVA and Tukey`s test. Production systems were also successfully differentiated by principal component analysis. It was found that eggs from alternative production systems did not exhibit higher nutritional value than eggs from conventional cage facilities. In the case of total protein, conventional eggs contained highest average amount. It was also evident, that impact on chemical composition is difficult to assign to production system in general, which was confirmed by alternative studies from this field, which in many cases considerably differs.
Anderson, K. E. 2011. Comparison of fatty acid, cholesterol, and vitamin A and E composition in eggs from hens housed in conventional cage and range production facilities. Poultry Science, vol. 90, no. 7, p. 1600-1608. https://doi.org/10.3382/ps.2010-01289 DOI: https://doi.org/10.3382/ps.2010-01289
Belitz, H., Grosch, W., Schieberle, P. 2009. Food chemistry 4th revision and extended edition. Berlin, Germany : Springer. 1070 p. ISBN 978-3-540-69933-0.
Bulková, V. 1999. Nauka o poživatinách (Teaching about foodstuffs). Brno, Czech Republic : Institut pro další vzdělávání pracovníků ve zdravotnictví. 204 p. ISBN 80-701-3293-0. (In Czech)
Council Directive 1999/74/EC of 19 July 1999 laying down minimum standards for the protection of laying hens. Official Journal L 203, 03/08/1999 P. 0053-0057.
Filipiak–Florkiewicz, A., Dereń, K., Florkiewicz, A., Topolska, K., Juszczak, L., Cieślik, E. 2017. The quality of eggs (organic and nutraceutical vs. conventional) and their technological properties. Poultry Science, vol. 96, no. 7, p. 2480-2490. https://doi.org/10.3382/ps/pew488 DOI: https://doi.org/10.3382/ps/pew488
Finglas, P. M., Roe, M. A., Pinchen, H. M., Berry, R., Church, S. M., Dodhia, S. K., Farron-Wilson, M., Swan, G. 2015. McCance amd Widdowson`s the composition of foods, seventh summary edition. Cambridge, UK : Royal society of chemistry, 630 p. ISBN 978-1-84973-636-7.
Geissler, C., Powers, H. 2010. Human nutrition. London, UK : Churchill livingstone, 792 p. ISBN 978-0-702-04463-2.
Hidalgo, A., Rossi, M., Clerici, F., Ratti, S. 2008. A market study on the quality characteristics of eggs from different housing systems. Food Chemistry, vol. 106, no. 3, p. 1031-1038. https://doi.org/10.1016/j.foodchem.2007.07.019 DOI: https://doi.org/10.1016/j.foodchem.2007.07.019
Kralik, G., Škrtić, Z., Suchý, P., Straková, E., Gajčević, Z. 2008. Feeding Fish Oil and Linseed Oil to Laying Hens to Increase the n-3 PUFA in Egg Yolk. Acta Veterinaria Brno, vol. 77, no. 4, p. 561-568. https://doi.org/10.2754/avb200877040561 DOI: https://doi.org/10.2754/avb200877040561
Küçükyılmaz, K., Bozkurt, M., Yamaner, Ç., Çınar, M., Çatlı, A. U., Konak, R. 2012. Effect of an organic and conventional rearing system on the mineral content of hen eggs. Food Chemistry, vol. 132, no. 2, p. 989-992. https://doi.org/10.1016/j.foodchem.2011.11.084 DOI: https://doi.org/10.1016/j.foodchem.2011.11.084
Lehninger, A. L., Nelson, D. L., Cox, M. M. 2013. Lehninger principles of biochemistry. 7th ed. New York, USA : W. H. Freeman, 1328 p. ISBN 10-1-4641-8795-9.
Lordelo, M., Fernandes, E., Bessa, R. J. B., Alves, S. P. 2016. Quality of eggs from different laying hen production systems, from indigenous breeds and specialty eggs. Poultry Science, vol. 6, no. 5, p. 728-730. https://doi.org/10.3382/ps/pew409 DOI: https://doi.org/10.3382/ps/pew409
Matt, D., Veromann, E., Luik, A. 2009. Effect of housing systems on biochemical composition of chicken eggs. Agronomy research, vol. 7, no. 2, p. 662-667.
Minelli, G., Sirri, F., Folegatti, E., Meluzzi, A., Franchini, A. 2016. Egg quality traits of laying hens reared in organic and conventional systems. Italian Journal of Animal Science, vol. 6, no. 1, p. 728-730. https://doi.org/10.4081/ijas.2007.1s.728 DOI: https://doi.org/10.4081/ijas.2007.1s.728
Plazonić, I., Barbarić-Mikočević, Ž., Antonović, A. 2016. Chemical Composition of Straw as an Alternative Material to Wood Raw Material in Fibre Isolation. Drvna industrija, vol. 67, no. 2, p. 119-125. https://doi.org/10.5552/drind.2016.1446 DOI: https://doi.org/10.5552/drind.2016.1446
Samman, S., Kung, F. P., Carter, L. M., Foster, M. J., Ahmad, Z. I., Phuyal, J. L., Petocz, P. 2009. Fatty acid composition of certified organic, conventional and omega-3 eggs. Food Chemistry, vol. 116, no. 4, p. 911-914. https://doi.org/10.1016/j.foodchem.2009.03.046 DOI: https://doi.org/10.1016/j.foodchem.2009.03.046
Schleenbecker, R., Hamm, U. 2013. Consumers’ perception of organic product characteristics. A review. Appetite, vol. 71, p. 420-429. https://doi.org/10.1016/j.appet.2013.08.020 DOI: https://doi.org/10.1016/j.appet.2013.08.020
Shafie, F. A., Rennie, D. 2012. Consumer Perceptions Towards Organic Food. Procedia - Social and Behavioral Sciences, vol. 49, p. 360-367. https://doi.org/10.1016/j.sbspro.2012.07.034 DOI: https://doi.org/10.1016/j.sbspro.2012.07.034
WATT, 2018. Poultry trends 2018 [online]. Available at: www.polutrytrends.com/201811/index.php#/2.
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