Fish Viscera Silage: Production, Characterization, and Digestibility of Nutrients and Energy for Tambaqui Juveniles
Thiago Macedo Santana,
Francisco de Matos Dantas,
Driely Kathriny Monteiro Dos Santos,
Juliana Tomomi Kojima,
Yugo Moraes Pastrana,
Rogério Souza De Jesus,
Ligia Uribe Gonçalves
Affiliations
Thiago Macedo Santana
Programa de Pós-graduação em Ciência Animal e Recursos Pesqueiros, Universidade Federal do Amazonas, Av. General Rodrigo Octavio Jordão Ramos, 1200, Manaus 69067-005, AM, Brazil
Francisco de Matos Dantas
Programa de Pós-graduação em Ciência Animal e Recursos Pesqueiros, Universidade Federal do Amazonas, Av. General Rodrigo Octavio Jordão Ramos, 1200, Manaus 69067-005, AM, Brazil
Driely Kathriny Monteiro Dos Santos
Programa de Pós-graduação em Aquicultura, Universidade Nilton Lins, Av. Prof. Nilton Lins, 3259-Flores, Manaus 69058-030, AM, Brazil
Juliana Tomomi Kojima
Programa de Pós-graduação em Aquicultura, Universidade Nilton Lins, Av. Prof. Nilton Lins, 3259-Flores, Manaus 69058-030, AM, Brazil
Yugo Moraes Pastrana
Instituto Nacional de Pesquisas da Amazônia, Av. André Araújo 2936, Manaus 69060-001, AM, Brazil
Rogério Souza De Jesus
Instituto Nacional de Pesquisas da Amazônia, Av. André Araújo 2936, Manaus 69060-001, AM, Brazil
Ligia Uribe Gonçalves
Instituto Nacional de Pesquisas da Amazônia, Av. André Araújo 2936, Manaus 69060-001, AM, Brazil
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.
