Abstract

The present study aimed to verify whether the inclusion of other ingredients in the diet of laying hens could interfere with the traceability of bovine meat and bone meal (BMBM) in eggs through stable carbon and nitrogen isotope analysis. Two hundred and fifty-six white laying hens were used and randomly distributed into eight treatments composed of: CONTROL: control diet; GLUTEN: control diet + corn gluten; YEAST: control diet + yeast; GLUTEN + YEAST: control diet + corn gluten + yeast; BMBM: control diet + 4.5 % BMBM; BMBM + GLUTEN: control diet + corn gluten + 4.5 % BMBM; BMBM + YEAST: control diet + yeast + 4.5 % BMBM; BMBM + GLUTEN + YEAST: control diet + corn gluten + yeast + 4.5 % BMBM. The isotopic results were subjected to multivariate analysis of variance (MANOVA) and LDA multivariate linear discriminant analysis. At 28 days, the eggs of the birds given diets without the addition of BMBM differed from the CONTROL group. The yolks showed that all treatments were significantly different from the CONTROL, and at 56 days, all eggs and egg yolks were different from the CONTROL. At 28 days, albumen was significantly different for all CONTROL experimental treatments; however, at 56 days, the YEAST treatment showed no difference from the control. Thus, it was concluded that even with the addition of other ingredients, the isotope technique is still able to detect the BMBM in eggs.

Highlights

  • Brazil is the third largest world producer of chicken meat and has one of the most productive commercial poultry industries in the world, becoming the largest poultry exporter in 2004

  • The present study aimed to verify whether the inclusion of other ingredients in the diet of laying hens could interfere with the traceability of bovine meat and bone meal (BMBM) in eggs through stable carbon and nitrogen isotope analysis

  • The carbon isotope ratio in association with the nitrogen isotope ratio enables the identification of the presence of bovine meat and bone meal (BMBM) (Carrijo et al, 2006), poultry viscera meal (Oliveira et al, 2010), poultry viscera meal and BMBM together with yeast and wheat bran (Gottmann et al, 2008) in the feed of broiler chickens

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Summary

Introduction

Brazil is the third largest world producer of chicken meat and has one of the most productive commercial poultry industries in the world, becoming the largest poultry exporter in 2004. Traceability is an increasingly important tool because it favors the consumer’s preferences and satisfaction and is a result of growing concern about food safety and quality in addition to being the basis for the implementation of a quality control program that spans the entire production chain (Chen and Huang, 2013; Menozzi et al, 2015). Continuous improvement of the certification process of poultry meat can protect the Brazilian poultry industry from the threat of imposition of non-tariff barriers by importing countries, and it acts as a tool for the exploration and conquest of new market niches (Oliveira et al, 2010). The carbon isotope ratio in association with the nitrogen isotope ratio enables the identification of the presence of bovine meat and bone meal (BMBM) (Carrijo et al, 2006), poultry viscera meal (Oliveira et al, 2010), poultry viscera meal and BMBM together with yeast and wheat bran (Gottmann et al, 2008) in the feed of broiler chickens

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