Partial substitution of fishmeal with soybean protein-based diets for dourado Salminus brasiliensis

Autor(es)

Correa, Roselany de Oliveira ^[1] ; Aguilar Aguilar, Fredy Armando ^[2] ; Pachelli da Cruz, Thaline Maira ^[3] ; Sabioni, Rafael Estevan ^[3] ; Possebon Cyrino, Jose Eurico ^[3]

Afiliação do(s) autor(es)

^[1] Embrapa Amazonia Oriental, Tv Dr Eneas Pinheiro S-N, BR-66017970 Belem, Para - Brazil

^[2] Fdn Univ Agr Colombia, Fac Ciencias Agr, Calle 170 54A-10, Bogota - Colombia

^[3] Univ Sao Paulo, ESALQ, Dept Zootecnia, Ave Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Scientia Agricola; v. 77, n. 2 2020.
• Citações Web of Science: 1

Resumo

ABSTRACT Cost and environmental restrictions limit the use of fishmeal (FM) in aquafeeds and plant protein (PP) sources. Soybean by-products are important alternative; however, their antinutritional factors may reduce fish growth. This study evaluates the effect of FM substitution for PP (soybean meal and soy protein concentrate) in diets of dourado (Salminus brasiliensis), a promising species for fish farming and empirically considered highly tolerant to PP-based diets. A control diet was formulated to contain 20 % of fishmeal and 61 % of plant protein (SBM) and other five diets with decreasing FM graded levels (16 %, 12 %, 8 %, 4 %, 0 %), which were replaced by soybean protein concentrate (SPC), comprising six treatments and four replicates. Fifteen dourados (6.73 ± 0.2 g) were stocked into 200 L tanks in a recirculating system, fed with experimental diets three times a day to apparent satiation for 90 days. Growth performance, food conversion ratio, protein efficiency ratio and protein retention efficiency of fish were impaired when FM substitution exceeded 13.05 % (the broken line analysis method). Histological analysis of intestinal mucosa showed a decrease in villus height when fishmeal was totally replaced by PP, which probably impaired digestive functions of fish and reflected in a severe loss on growth performance. (AU)

• Processo FAPESP: 12/19549-0 - Torta de pinhão manso (Jatropha curcas L.) detoxificada: potencial de uso em rações para pacu (Piaractus mesopotamicus) e dourado (Salminus brasiliensis)
• Beneficiário: José Eurico Possebon Cyrino
• Modalidade de apoio: Auxílio à Pesquisa - Regular