Study of the microbiota of the insectTenebrio molitorin different light conditions and with two diets based on by-products from the food industry
Abstract
The intestinal microbiota of insects can be defined as the community of microorganisms living in the intestinal tract, which performs basic functions in digestive and immune system processes. The objective of this study is to analyze the microbiota of Tenebrio molitor larvae under different light conditions and with two different diets. The effect on the microbiota when subjected to continuous light, photoperiod, constant darkness and continuous red light, and two different diets based on by–products of the food industry, one composed of 80% broccoli and 20% oats, and the other of 80% spent coffee grounds and 20% oats, are studied to check the degree of reuse they could have.
In all treatments, the phyla Tenericutes, Proteobacteria, Firmicutes and Cyanobacteria predominated; and in smaller proportions, Bacteroidetes and Actinobacteria.
As a conclusion, it was determined that different light conditions do not show variation in the bacterial composition of T. molitor, however, different diets modify their intestinal microbiota. The broccoli diet was dominated by Tenericutes (mean 41,9%) and Firmicutes (31,3%), while the spent coffee grounds diet was dominated by bacteria of the Proteobacteria phylum (62%).
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References
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