Abstract The decreasing stock of the main species consumed in Brazil has stimulated studies regarding the use and development of products using low commercial value species. The shrimp trawling modality produces a large volume of a “mix” category comprising low commercial value fish. However, it is necessary to develop products with greater practicality to meet the current demands of the Brazilian consumer. The aim of the present study was to develop a sausage using a low commercial value fish, the Brazilian flathead (Percophis brasiliensis ), caught in the fish trawling “mix” category landed in Niterói/RJ, and perform physico-chemical, microbiological, toxicological and sensorial analyses. The centesimal composition of the analyzed fish were as follows: humidity 73.78%, proteins 16.17%, carbohydrates 3.75%, total lipids 4.41% and ash 1.78%. The microbiological and toxicological results were within the legislation standards. Twenty varieties of fatty acids (AG) were detected, with the most frequent being palmitic acid (22.81%). Among the omega-3 series, the most frequent were eicosapentaenoic acid (5.36%) and docosahexaenoic acid (15.95%). Regarding minerals, the most noteworthy were sodium, calcium and iron (1114.24 mg, 112.32 mg and 1.73 mg respectively). The sausage showed 87.30% acceptability. The results demonstrate that the low commercial value fish Brazilian flathead resulted in a viable product for use in fish technology, with excellent nutritional results.

A polpa de umbu é um importante produto na economia da região semiárida do Brasil e sua conservação pode ser estendida por tratamento térmico. Um planejamento fatorial completo com 2 fatores (tempo e temperatura) e 3 pontos centrais foi utilizado para verificar o efeito do processo HTST sobre a qualidade físico-química, química, física, microbiológica e sensorial de polpas de umbu. Os resultados mostraram que o tratamento térmico aplicado resultou em produtos sem significantes alterações nas características físico-químicas, químicas e microbiológicas. Com respeito à cor, os parâmetros L e a* foram alterados pelo aumento da temperatura, indicando um escurecimento na cor. A avaliação sensorial indicou que o tratamento 88 °C por 10 segundos foi a melhor condição de processamento, devido à maior similaridade do produto resultante com a amostra referência (polpa branqueada).

Umbu pulp is an important product in the economy of the northeastern region of Brazil, and its preservation can be ensured by heat treatment. A complete factorial design with 2 factors (time and temperature) and 3 central points was used to verify the effect of the HTST process on the physicochemical, chemical, physical, microbiological, and sensory qualities of umbu pulps. The results showed that the heat treatments applied resulted in products without significant alterations on the physicochemical, chemical, and microbiological characteristics. With respect to color, the parameters L and a* were altered by increases in temperature indicating by darkening of color. The sensory evaluation indicated that a treatment of 88 °C for 10 seconds was the best processing condition due to the greater similarity of the resulting product to the reference sample (blanched pulp).