Estudos zootécnicos e metabólicos para avaliação do potencial do extrato de Curcuma longa como aditivo para pós-larvas de camarão Macrobrachium rosenbergii

Abstract

Among the various activities developed in aquaculture, shrimp farming (shrimp farming) is highlighted given the volume of world production, the commercial value added to the product and the effective growth in consumption. One of the species used for commercial cultivation is Macrobrachium rosenbergii, known as the Malaysian freshwater or giant shrimp. Considering the need for aquaculture development as well as the great potential of freshwater shrimp farming as an economically and environmentally sustainable activity, the search for alternatives aimed at improving the physiological and metabolic conditions of animals during cultivation has been growing in recent years and deserves to be highlighted. In this sense, the use of supplementation in diets represents an important option for improving the production of M. rosenbergii. Thus, this work aimed to evaluate the potential use of Curcuma longa extract as a dietary supplement for post-larvae shrimp M. rosenbergii and the influence on animal growth and metabolism during cultivation. Shrimp post-larvae were fed with feed with added turmeric extract (0.05%, 0.2%, 1%) in two feedings daily for 60 days. After this period, the animals were weighed and measured and subsequently sacrificed and the hepatopancreas and muscle removed, homogenized and the supernatants of the homogenates used to carry out the enzymatic assays. The zootechnical parameters (weight, total length and standard length) and the activities of digestive enzymes (trypsin, chymotrypsin, amylase, cellulase, maltase

and lipase), of amino acid metabolism enzymes (aspartate-aminotransferase (AST), alaline- aminotransferase (ALT), glutamate dehydrogenase) and citrate synthase, regulatory enzyme

of the Krebs Cycle. The data obtained show that the turmeric extract promoted an increase in weight gain in the 0.05% group compared to the control and that the other zootechnical parameters were not significantly altered by the treatment with the different concentrations of turmeric. Lipase, trypsin, chymotrypsin and cellulase activities had a significant increase in activity at the 0.05% concentration when compared to the control and experimental groups. As for the activities of AST and ALT, they did not change in any of the treatments. On the other hand, the 0.05% concentration of turmeric extract promoted a significant increase in glutamate dehydrogenase activity when compared to the control and 0.2% groups. In addition, there was a significant increase in citrate synthase activity in the hepatopancreas and in the shrimp muscle. availability of foods with chemical composition of superior nutritional quality, satisfying the consumer market.