The bycatch is one of the major problems of shrimp trawl fisheries since it accidentally catches thousands of tonnes of non-economic organisms returning them dead to the sea. This creates a major ecological imbalance in the exploited areas. On the other hand, this fishing reject can be an abundant source of protein that could add value to this reject and become a product of interest to the food industries. Thus, the aims of this project are to investigate the antimicrobial activity and test the different types of microencapsulation methods compared to the efficiency of retention of antioxidant activity of protein hydrolysates obtained from the four more abundant species from bycatch to add value to these discarded animals and minimize their negative impact of the shrimp trawl fisheries on the environment. The four species of the bycatch will be collect in the region of Ubatuba, São Paulo, Brazil, by double-rig in a commercial shrimp trawling. The hydrolyzes process will be initiated using two commercial enzyme. The hydrolysates will be taken to Bioengineering and Microbial Dynamics at Food Interfaces (BIODYMIA) of the University of Lyon in France, where the antimicrobial activity in the protein hydrolysates will be analyzed. Additionally, the effect of the microencapsulation of the hydrolysates by pectin complex coacervation and subsequent spray-drying on the antioxidant activity and antimicrobial activity will be evaluated. The results will be discussed under the assistance of supervisor, Prof. Dr. Adem Gharsallaoui, who is known expert in proteins/polysaccharides interactions, antimicrobial packaging, biopolymers and microencapsulation and controlled release of food active. This internship opportunity allows the establishment of an international partnership with the Prof. Dr. Adem Gharsallaoui and will improve the scientific perspective and the network of the PhD student. Also, the PhD student will have the knowledge of a new technique and will be able to transfer this knowledge to Aquaculture Center and to Brazilian collaborators being able to start a new field of research.
News published in Agência FAPESP Newsletter about the scholarship: