Sensory Acceptance, Microbiological, and Nutritional Properties of a Sausage-like Meat Product Produced with Partial Inclusion of Rhynchophorus palmarum Larvae

Ahmed El-Salous^1*, Luis Zuniga-Moreno¹, Jesus R. Melendez², Evelyn Castro¹, Winston Espinoza¹, Daniel Mancero-Castillo¹, Pablo Nuñez-Rodríguez³ and Freddy Arcos³

¹Research Institute “Dr Jacobo Bucaram”, Universidad Agraria del Ecuador, Guayaquil, Ecuador.

²Facultad de Educación Técnica para el Desarrollo, Universidad Católica de Santiago de Guayaquil, Guayaquil, Ecuador.

³Universidad Agraria del Ecuador, Milagro, Ecuador.

Corresponding Author E-mail: eelsalous@uagraria.edu.ec

Rhynchoporus palmarum is widely considered to be a harmful pest of many crops. Nevertheless, it is highly valued as a food source in some countries, providing valuable components, mainly protein and fatty acids. The aim of this study was to develop a sausage with partial incorporation of R. palmarum larvae and to explore its potential as an alternative ingredient, taking into account the sensory acceptance of the final product, as well as nutritional and microbiological aspects. Experimental formulations containing 30, 20, and 10% larvae (F1, F2, F3, respectively) partially replaced pork meat and vegetable fat, and a control (F0) without R. palmarum larvae. One hundred and fifty semi-trained panelists rated the taste, aroma, color, texture, and overall acceptability of the four formulations using a 5-point hedonic scale. F2 showed favorable sensory acceptance for taste, color, texture, and overall acceptability, with no significant statistical difference from F0, but aroma showed a significantly better score than F0. Nutritional data showed increasing patterns for energy, fat, and sodium, while decreasing values for cholesterol, protein, and total carbohydrate for F1, F2, and F3, respectively. The microbiological characteristics of the experimental formulations for aerobic plate count, E. coli count, S. aureus, and Salmonella spp. met the requirements of the Ecuadorian standard NTE 1338:2012 for cooked meat products. This research highlights the potential of Rhynchophorus palmarum larvae as a viable and sustainable option for partial meat substitution in sausage production, offering an innovative approach to improve nutritional value and diversify product offerings in the food industry.

Alternative Protein; Insects; Novel Food; Palm Weevil

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