Dietary Protein Hydrolysates from Animal By-Products: Digestibility and Enzymatic Activity for Dourado Salminus brasiliensis

Autor(es)

Lorenz, Evandro Kleber ^[1] ; Coelho Barone, Rafael Simoes ^[1] ; Yamamoto, Fernando Yugo ^[1] ; Possebon Cyrino, Jose Eurico ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, ESALQ, Dept Zootecnia LZT, PPG CAP, Piracicaba, SP - Brazil

^[2] Univ Sao Paulo, ESALQ, Dept Zootecnia LZT, Ave Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Aquatic Food Product Technology; v. 27, n. 2, p. 236-246, 2018.
• Citações Web of Science: 1

Resumo

Fishmeal (FM) is a high-cost and scarce feedstuff. Notwithstanding, the formulation and processing of diets for carnivorous fish strongly rely on FM as a protein source, given its palatability and biological value. Animal by-product hydrolysates are high-quality feedstuff and can substitute FM in aquafeeds. This study evaluated the digestibility of hydrolysates from tilapia residue (TR), tuna head (TH), swine liver (SL), and poultry liver (PL), and the profile of digestive enzymes in juvenile dourado, Salminus brasiliensis, a carnivorous Characin, fed diets containing graded levels of the hydrolysates. Inclusion of hydrolysates in diet formulations lowered the pH of feed but did not alter feed intake by fish. Higher apparent digestibility coefficients (ADCs) of diets were recorded for fish fed diets containing TR and SL, and lower ADCs were recorded for fish fed diets containing TH. Protease and lipase activities in the animal's stomach were higher, especially for those fed with diets containing SL. Amylase activity was higher in pyloric caeca, whereas in the intestines, the higher activity was seen in fish fed control and TR diets. Animal by-product hydrolysates were highly digestible for dourado, and the enzymatic profile of fish was influenced by the nutrient contents of diets. (AU)

• Processo FAPESP: 13/16023-0 - Velocidade de corrente, crescimento e produtividade de juvenis de pacu Piaractus mesopotamicus e dourado Salminus brasiliensis
• Beneficiário: Evandro Kleber Lorenz
• Modalidade de apoio: Bolsas no Brasil - Doutorado