Digestible protein requirements and muscle growth in juvenile tambaqui (Colossoma macropomum)

Author(s)

Buzollo, Hellen ^[1] ; Goncalves de Sandre, Lidiane Cristina ^[1] ; Neira, Ligia Maria ^[1] ; Torres do Nascimento, Thiago Matias ^[1] ; Jomori, Rosangela Kiyoko ^[2] ; Carneiro, Dalton Jose ^[1]

Affiliation

^[1] UNESP Univ Estadual Paulista, Fac Ciencias Agr & Vet, Jaboticabal - Brazil

^[2] FE, Fac Dr Francisco Maeda FAFRAM, Ituverava - Brazil

• Document type: Journal article
• Source: AQUACULTURE NUTRITION; v. 25, n. 3, p. 669-679, JUN 2019.
• Web of Science Citations: 3

Abstract

Several investigations have been carried out to improve the productivity of tambaqui, an economically important fish species in Brazil and other Latin American countries. This study determined the digestible protein (DP) requirements in juvenile tambaqui by assessing their productive performance and nutritional efficiency. It also evaluated the effects of different dietary DP levels on the morphology and cellularity of skeletal fast muscle fibres. The 1750 tambaqui tested (6.53 +/- 0.43 g body weight, 7.58 +/- 0.18 cm length) were randomly distributed into 35 tanks. Fish were fed one of the seven isocaloric diets, which contained 140, 170, 200, 230, 260, 290 or 320 g/kg DP. The DP requirement, calculated by segmented (broken line) regression of weight gain data, was 290 g/kg. An increase in diet DP to 290 g/kg significantly improved final weight, weight gain, feed intake, specific growth rate and crude protein gain, and changed fibre diameter in deep muscle. Muscle fibres were randomly distributed into a mosaic pattern, characterized by fibres with different diameters. Treatments with 290 and 320 g/kg DP increased the frequency of large-diameter fibres (>50 mu m), indicating hypertrophic growth of skeletal muscle during the juvenile phase, which occurred in conjunction with hyperplasia. (AU)

• FAPESP's process: 11/12963-2 - Digestible protein requirement of juvenile tambaqui and dynamics of muscle growth by aspects morphological and isotopic turnover of carbon-13 and nitrogen-15
• Grantee: Hellen Buzollo Pazzini
• Support type: Scholarships in Brazil - Doctorate
• FAPESP's process: 12/09126-4 - Requirement of digestible protein and amino acids in tambaqui juveniles and muscle growth dynamics by morphological aspects and isotopic turnover of carbon-13 and nitrogen-15
• Grantee: Dalton José Carneiro
• Support type: Regular Research Grants