New perspectives on dietary fiber in fish feed: use of passion fruit residue in tambaqui (Colossoma macropomum) feed and the effects on digestibility, physiology and metabolism

• Grant number: 23/17195-0
• Support Opportunities: Regular Research Grants
• Start date: February 01, 2025
• End date: January 31, 2027
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding
• Principal Investigator: Leonardo Susumu Takahashi
• Grantee: Leonardo Susumu Takahashi
• Host Institution: Faculdade de Ciências Agrárias e Tecnológicas. Universidade Estadual Paulista (UNESP). Campus de Dracena. Dracena , SP, Brazil
• Associated researchers: Fernando Yugo Yamamoto ; Francisco Javier Alarcón ; Ivan Daniel dos Santos Martins Viegas ; Roger Wagner
• Associated scholarship(s): 25/09641-6 - New perspectives on dietary fiber in fish nutrition: use of passion fruit by-product in tambaqui (Colossoma macropomum) feeding and its effects on digestibility, physiology, and metabolism., BP.TT

Abstract

Although the use of dietary fiber in diets for monogastrics has been left behind in the past, recent studies show that, at ideal levels, fiber has effects similar to commercial prebiotics currently sold. Its use in fish diets is linked to the principles of circular bioeconomy that aims to reuse waste in food production. The natural diet of tambaqui (Colossoma macropomum) and its adaptation to different varieties are indicative that agro-industry waste is a practical alternative to replacing conventional ingredients used in fish feed that are not easily accessible in the northern region of the country, main producer of the species, consisting of an important tool to boost the tambaqui production chain, a native Brazilian species. The objective of this work will be to evaluate the potential for using the residue from the extraction of passion fruit juice pulp in diets for tambaqui, aiming to understand the physiological and metabolic mechanisms of total dietary fiber, soluble dietary fiber and insoluble dietary fiber from the raw residue. It also seeks to find practical alternatives for the extraction of fibrous fractions, considering their use in the production sector. In addition to seeking to fill some important gaps regarding the metabolic effect of dietary fiber in fish. (AU)