Vegetable wastes from industrial processing are excellent substrates for insect rearing, as they are rich in bioactive compounds. In particular, the larvae of Hermetia Illucens (HI), commonly called soldier fly, are able to bio-convert about 90% of organic waste into nutrients (protein, lipids, etc.). As a result, HI can be used as fish and animal feed. The aim of this thesis work was to evaluate how the lipid composition of the plant substrates used influenced that of the larvae. Larvae were grown on 6 different substrates in addition to a control diet, and then the lipid profile of both the diets and their respective larvae was analyzed by gas chromatography. The chickpea-containing diets showed higher saturated and monounsaturated fatty acid content than the control. However, only the larvae fed bean:chickpea showed a higher fatty acid content than the control. In particular, HI larvae were found to be rich in C12:0, C16:0 and C18:1 and, poor in polyunsaturated fatty acids. In conclusion, it is possible to modulate the fatty acid profile of the larvae through their diet.
Gli scarti vegetali derivanti dalla lavorazione industriale sono ottimi substrati per l’allevamento di insetti, in quanto ricchi di composti bioattivi. In particolare, le larve di Hermetia Illucens (HI), comunemente chiamata mosca soldato, sono in grado di bio-convertire il 90% circa di scarti organici in sostanze nutritive (proteine, lipidi, etc.). Di conseguenza, HI può essere utilizzata come mangime per pesci ed animali. Lo scopo del presente lavoro di tesi è stato quello di valutare come la composizione lipidica dei substrati vegetali utilizzati abbia influenzato quella delle larve. Le larve sono state cresciute su 6 substrati differenti oltre ad una dieta controllo e, successivamente il profilo lipidico sia delle diete che delle rispettive larve è stato analizzato mediante gas cromatografia. Le diete contenenti cece hanno mostrato un contenuto di acidi grassi saturi e monoinsaturi maggiore rispetto al controllo. Ad ogni modo, solo le larve nutrite con fagiolo: cece hanno mostrato un contenuto maggiore di acidi grassi rispetto al controllo. In particolare, le larve di HI sono risultate essere ricche in C12:0, C16:0 e C18:1 e, povere in acidi grassi polinsaturi. In conclusione, è possibile modulare il profilo degli acidi grassi delle larve attraverso la loro dieta.
Valore nutrizionale di Hermetia Illucens nutrita con sottoprodotti di origine vegetale
ROMANO, ELENA
2021/2022
Abstract
Vegetable wastes from industrial processing are excellent substrates for insect rearing, as they are rich in bioactive compounds. In particular, the larvae of Hermetia Illucens (HI), commonly called soldier fly, are able to bio-convert about 90% of organic waste into nutrients (protein, lipids, etc.). As a result, HI can be used as fish and animal feed. The aim of this thesis work was to evaluate how the lipid composition of the plant substrates used influenced that of the larvae. Larvae were grown on 6 different substrates in addition to a control diet, and then the lipid profile of both the diets and their respective larvae was analyzed by gas chromatography. The chickpea-containing diets showed higher saturated and monounsaturated fatty acid content than the control. However, only the larvae fed bean:chickpea showed a higher fatty acid content than the control. In particular, HI larvae were found to be rich in C12:0, C16:0 and C18:1 and, poor in polyunsaturated fatty acids. In conclusion, it is possible to modulate the fatty acid profile of the larvae through their diet.File | Dimensione | Formato | |
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Tesi-Elena Romano.pdf
embargo fino al 23/05/2026
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https://hdl.handle.net/20.500.12075/13146