Advances in the processing of marine discard and by-products

Abstract

Approximately 90 % of by-products from fish and shellfish harvest are currently used in the manufacture of fish meal and oil, and 10 % are used in aquaculture. However, these by-products can have added value that may be harnessed through biotechnological advances in the processing of fish and shellfish products and by-products. Indeed, by-product materials may be viewed as coproducts and have potential for use as food, chemical, and cosmeceutical ingredients. This chapter examines the processing of marine by-products and the recovery of valuable proteins and carbohydrates, including gelatine and chitin/chitosan, from fish and shellfish. Furthermore, potential methods for recovering protein materials from stickwater and potential uses of low economic bycatch species such as Capros aper arediscussed. The benefits of fish protein and peptides on health are also exposed.