Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/31147
Title: Analysis of eggshell mineral composition for tracing the origin of table eggs
Contributor(s): Dao, T H  (author)orcid ; Swick, R A  (author)orcid ; Nguyen, V T (author); Hunt, P W (author); Hine, B (author); Ruhnke, I  (author)orcid 
Publication Date: 2019
Open Access: Yes
Handle Link: https://hdl.handle.net/1959.11/31147
Open Access Link: http://www.wpsa.com/index.php/publications/wpsa-proceedings/2019Open Access Link
Abstract: In Australia and many other countries, free-range eggs can be sold at significantly higher prices than cage eggs. The mislabeling of cage eggs as free-range eggs and vice versa has been documented, and has a significant impact on consumer confidence and therefore egg consumption. The development of methods to distinguish eggs produced from different production systems is necessary to satisfy consumer demand. The objective of this study was to determine if eggshell mineral composition could be used as a way to differentiate eggs originating from each production system. Our hypothesis was that hens having access to soil would have higher levels of trace minerals in their egg shells than would caged hens. Egg samples were randomly collected from six commercial caged and six commercial free-range flocks in Australia. Twelve eggshell samples from each flock were analysed for mineral composition ( calcium, phosphorus, magnesiwn, sodium, aluminium, boron, copper, 1nanganese, iron, potassium, sulfur and zinc) using inductively coupled plasma optical emission spectro,netry (ICP-OES). The results showed that eggshells from free-range hens contained significantly higher macro-minerals (P, Mg and Na) but lower micro-minerals (Cu, Fe, K, S and Mn) than eggshells from caged hens (P < 0.05). Mean differences in mineral content of eggshells were observed between the two production syste1ns with 1025 μg Na /g eggshell for free range versus 917 μg/g for cage and 3.38 μg Fe /g eggshell for free range versus 4.64 μg/g for cage. However, variable levels of eggshell minerals (including Na and Fe) were noted within and between production systems. Thus, it is concluded that analysis of eggshell mineral co1nposition is not effective to differentiate the origin of eggs.
Publication Type: Conference Publication
Conference Details: ESPN 2019: 22nd European Symposium on Poultry Nutrition, Gdansk, Poland, 10th - 13th June, 2019
Source of Publication: Proceedings of the 22nd European Symposium on Poultry Nutrition, p. 286-286
Publisher: World's Poultry Science Association (WPSA)
Place of Publication: Beekbergen, Netherlands
Fields of Research (FoR) 2008: 060603 Animal Physiology - Systems
Fields of Research (FoR) 2020: 300303 Animal nutrition
Socio-Economic Objective (SEO) 2008: 830501 Eggs
Socio-Economic Objective (SEO) 2020: 100411 Poultry
HERDC Category Description: E5 Conference Poster
WorldCat record: http://www.worldcat.org/oclc/1130784630
Description: This research output was presented as a poster.
Appears in Collections:Conference Publication
School of Environmental and Rural Science

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