Invertebrates of Siberia, a potential source of animal protein for innovative food and feed production. 5. Changes of nutrient composition in worms and crickets after particular enrichment of feeding substrate

This study explores the prospect of regulating the nutrient composition in the biomass of terrestrial invertebrates by enriching the nutrient substrate with precursors of particular nutrients.The experiment was conducted on two model species: the house cricket Acheta domesticus (Linnaeus, 1758) and the earthworm Eisenia fetida (Savigny, 1826).It was established that partial enrichment of the food substrate with precursors of specifi c nutrients shows non-uniform accumulation of nutrients in the biomass of model invertebrate species.The protein content in crickets did not change, while in worms, it increased by 1.2 times with a single dose and 1.1 times with a double dose of substrate enrichment.Enrichment of the food substrate with minerals also did not show a clear pattern of accumulation of individual minerals in the biomass depending on the addition of precursors to the food substrate.Worms better accumulate minerals, and substrate enrichment can slightly increase the content of individual elements.The level of most B-group vitamins increased in both worms and crickets after single-dose substrate enrichment, and a double dose showed a signifi cant increase in concentration for some vitamins.Fat-soluble vitamins showed a clear pattern of accumulation in the biomass of crickets and worms, with a double dose of precursors increasing their concentration compared to a single dose.The accumulation of vitamin C was most pronounced, with a signifi cant increase in its level with a double dose compared to a single dose.. . : Acheta domesticus (Linnaeus, 1758) Eisenia fetida (Savigny, 1826)., - . , 1,2 1,1 . . , . B , ,