Fish Viscera Silage: Production, Characterization, and Digestibility of Nutrients and Energy for Tambaqui Juveniles

Fish viscera can be an important source of protein and energy for aquafeed, and its use contributes to circular aquaculture. The aim of this study was to produce acid and fermented silage from fish viscera to determine their nutritional value and the apparent digestibility coefficient of nutrients a...

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Bibliographic Details
Published in:Fishes 2023-02, Vol.8 (2), p.111
Main Authors: Santana, Thiago Macedo, Dantas, Francisco de Matos, Monteiro Dos Santos, Driely Kathriny, Kojima, Juliana Tomomi, Pastrana, Yugo Moraes, De Jesus, Rogério Souza, Gonçalves, Ligia Uribe
Format: Article
Language:English
Subjects:
Amino acids
Aquaculture
Aquaculture feeds
Bioconversion
Carbohydrates
Cassava
Colossoma macropomum
Dietary minerals
Digestibility
Dry matter
Energy
Fatty acids
Feces
Fermentation
Fermented food
Fish
fish waste
Fungicides
Juveniles
Leucine
Lipids
Lysine
Molasses
neotropical fish
Nitrogen
Nutrients
Nutritive value
Polyculture (aquaculture)
Production processes
protein hydrolysis
Protein sources
Proteins
Silage
Sorbic acid
Syrups & sweeteners
Viscera
Wheat bran
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Summary:Fish viscera can be an important source of protein and energy for aquafeed, and its use contributes to circular aquaculture. The aim of this study was to produce acid and fermented silage from fish viscera to determine their nutritional value and the apparent digestibility coefficient of nutrients and energy for juvenile tambaqui (Colossoma macropomum). An acid silage and three fermented silages with different sources of carbohydrates (molasses, wheat bran, and cassava waste) were produced with 0.25% sorbic acid as an antifungal in the formulation. Silages presented an average of 55% dry matter, 62.9% lipids, and 12% crude protein. Leucine and lysine predominated as essential amino acids in the acid silage and fermented silages. Fish viscera silages presented EPA and DHA content from 5.4 to 17.8 and 1.7 to 8.9 mg.g−1 of lipids, respectively. The apparent digestibility coefficient (ADC) (indirect method) was above 82% for gross energy for all the formulations. The ADCs for protein were similar for the fermented silages, with a maximum 92% level for the fermented wheat bran silage. The bioconversion of fish viscera into silage makes it an energy ingredient for aquafeed that is well digested by tambaqui juveniles.
ISSN:2410-3888
2410-3888
DOI:10.3390/fishes8020111