Quality of eggs after feed supplements with silkworm pupae (Bombyx mori) and black fly larvae (Hermetia illucens)

Desislava B. Vlahova-Vangelova,Nikolay D. Kolev,Mitko Lalev

doi:10.1051/bioconf/20224501011

Desislava B. Vlahova-Vangelova, Nikolay D. Kolev

Open Access

https://doi.org/10.1051/bioconf/20224501011

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Abstract

The quality of hen eggs after partial replacement (7%) of soybean meal with silkworm pupae flour (Bombyx mori) and black soldier fly larvae flour (Hermetia illucens) was studied. Three groups of eggs were examined -C (control, standard feed), K (7% pupae), L (7% larvae flour). Both replacements in feed didn’t have a significant effect on the pH of egg white and yolk (p > 0.05). Lightness (L*) of the egg white KW decreased, and it’s a* values increased (p < 0.05). In egg white LW, was found an opposite effect. A decrease in the yellowness (b*) was found in egg white KW (p < 0.05). The use of fortified feed with black soldier fly larvae significantly reduces the redness (a*) and yellowness (b*) of the colour in the yolk LY. After the addition of larvae to the feed, the b* value increased by about 10% (p < 0.05). The share of oleic (C18:1) and linoleic acid (C18:2) in the yolk (KY) increases, while the yolks of group L had the highest content of linolenic acid (C18:3). The partial replacement of soybean meal with both black soldier fly larvae and silkworm pupae increases the proportion of unsaturated fatty acids in the examined eggs.

Highlights

Eggs are a source of nutrients, fats, vitamins and minerals, and large amounts of cholesterol [1]
In order to reduce the risk of cardiovascular disease resulting from high cholesterol intake, it is recommended to consume foods rich in polyunsaturated fatty acids (PUFA) [2]
When it comes to insects that we can feed chickens and other slaughter animals, the yellow mealworm [8] and the Black Soldier fly larvae (Hermetia illucens) [7] are most often preferred

Summary

Introduction

Eggs are a source of nutrients, fats, vitamins and minerals, and large amounts of cholesterol [1]. Insects are an alternative source of nutrients for both humans and animals [7]. Their exoskeleton is a rich source of chitin, it in turn has a beneficial effect on the beneficial microflora in the colon. These properties could reduce the use of antibiotics in animal husbandry [5]. The high protein content and rich microelement composition make the flour from insects promising sources for improving the nutritional value of the meat of slaughter animals and eggs. The lack of sufficient scientific information and the great consumer interest form the aim of the present study - to track the changes in the physicochemical, colour characteristics

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Conclusion