Bioprospecting of antioxidant compounds in the bycatch

Author(s)

Tavani Rocha Camargo

• Document type: Doctoral Thesis
• Press: Jaboticabal. 2020-06-05.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal
• Defense date: 2020-02-14
• Advisor: Wagner Cotroni Valenti

Abstract

In recent years, the bycatch of shrimp fishing has been the subject of studies as it is one of the factors of the great environmental impact caused by trawling. However, this bycatch can have functional and bioactive properties, such as antioxidant peptides, which could add value to this reject and become a product of interest to the food industries. Thus, the present study aimed to investigate the antioxidant activity of protein hydrolysates obtained from the most abundant animals of the bycatch and to microencapsulate these hydrolysates to add value to this normally discarded material. The results demonstrate that enzymatic hydrolysis, using the commercial enzymes Alcalase 2.4 L® and Protamex®, is an efficient method to release peptides of economic interest in the two most abundant species of fish (Micropogonias furnieri and Paralonchurus brasilensis) and in the two most abundant crustaceans (Callinectes ornatus and Hepatus pudibundus). Hydrolysis released peptides with antioxidant activity in all samples analyzed, submitted to the two enzymes tested. Complex coacervation and subsequent microencapsulation by spray-drying proved to be efficient to protect the antioxidant activity of these protein hydrolysates. Thus, the results provide evidence for the potential use of hydrolysates of the analyzed species as a functional or nutraceutical ingredient in the food industry. (AU)

• FAPESP's process: 16/11182-0 - Bioprospecting of antioxidant compounds in the by-catch of demersal fishing and use of these biomolecules as nutraceuticals in aquaculture
• Grantee: Tavani Rocha Camargo
• Support Opportunities: Scholarships in Brazil - Doctorate