The Use of Seaweed As Sustainable Feed Ingredient for the House Cricket (acheta Domesticus): Investigating Cricket Performance and Nutritional Composition

B. Ajdini,I. Biancarosa,G. Cardinaletti,S. Illuminati,A. Annibaldi,F. Girolametti,M. Fanelli,G. Pascon, M. Martinoli,F. Tulli, T. Pinto,C. Truzzi

JOURNAL OF INSECTS AS FOOD AND FEED（2024）

Univ Politecn Marche | Nutrinsect SRL | Univ Udine | Consiglio per la ricerca in agricoltura e l’analisi dell’economia agraria

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Abstract

The house cricket ( Acheta domesticus) ) is considered one of the most promising farmed insect to be used as novel food, thanks to its attractive nutritional profile and its great taste. To the best of our knowledge, crickets in Europe are reared on soybean meal-rich feed which won't be sustainable in the long run. Insect producers have shown interest in using more environmentally friendly substrates for cricket's rearing. Among these, seaweed has been investigated as feed ingredients for insect rearing. However, no studies on crickets are available. We aimed to evaluate the potential use of the alga Palmaria palmata in the diet of house crickets (5%, 10% and 20% of the diet), in terms of insect performances and nutritional composition (protein, lipid, amino acids and fatty acids). Crickets fed seaweed-enriched diets showed good performance parameters (individual weight, cricket yield and survival) compared to crickets fed the control diet without presenting statistically significant differences (P P > 0.05), while their nutritional composition changed significantly for some components. Protein content of the crickets increased when more seaweed was added to their diets (P P = 0.0115), while the fat content decreased (P P = 0.0451). Also, the amino acid composition of the crickets remained stable between dietary groups, except for histidine, methionine and lysine which increased in crickets fed more seaweed in the diet (P P = 0.0430, P = 0.0342, P = 0.0302, respectively). Finally, the presence of seaweed in the diet led to a transfer of the omega-3 eicosapentaenoic acid from the seaweed to the crickets (P P < 0.0001), which are naturally lacking this fatty acid. Based on this study, we conclude that the red alga Palmaria Palmata is a suitable substrate for cricket mass rearing up to 20 g/100 g of the diet. However, higher seaweed inclusion and longer dietary administration time could affect the nutritional composition of the house cricket differently, therefore they should be investigated.

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Key words

house cricket,novel food,nutritional composition,fatty acids,seaweed

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【要点】：本研究探讨了使用海藻Palmaria palmata作为家蟋蟀（Acheta domesticus）可持续饲料成分的可能性，分析了蟋蟀的生长性能和营养成分变化。

【方法】：通过将海藻以5%、10%和20%的比例加入蟋蟀饲料中，评估蟋蟀的生长性能（个体重量、产量和存活率）及营养成分（蛋白质、脂肪、氨基酸和脂肪酸）的变化。

【实验】：实验使用的数据集为蟋蟀在不同比例海藻饲料下的生长和营养成分数据，结果表明，喂食海藻饲料的蟋蟀表现良好，营养成分发生变化，蛋白质含量增加，脂肪含量降低，特定氨基酸含量提高，且海藻中的omega-3脂肪酸成功转移到蟋蟀体内。