Author(s):
Khan, Kifayat Ullah [UNESP] ; Gous, Robert Mervyn ; Mansano, Cleber Fernando M. ; Nascimento, Thiago Matias T. [UNESP] ; Romaneli, Rafael de S. [UNESP] ; Rodrigues, Andressa Tellechea [UNESP] ; Sakomura, Nilva Kazue [UNESP] ; Fernandes, João Batista K. [UNESP]
Date: 2020
Persistent ID: http://hdl.handle.net/11449/200563
Origin: Oasisbr
Subject(s): amino acid balance; biological and economic performance; dietary protein; modelling in nutrition; Piaractus mesopotamicus; amino acid balance; amino acid balance; biological and economic performance; biological and economic performance; dietary protein; dietary protein; modelling in nutrition; modelling in nutrition; Piaractus mesopotamicus; Piaractus mesopotamicus
Description
Made available in DSpace on 2020-12-12T02:09:51Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-09-01
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
This 45-day work aimed to determine the response of juvenile pacu (Piaractus mesopotamicus) to balanced digestible protein (BDP) and to use these responses to determine whether the optimum economic levels of BDP would differ depending on the form in which the fish is sold. Six isoenergetic diets containing 163, 201, 238, 272, 315 and 348 g/kg BDP (dry-matter basis) were prepared through the serial dilutions of a high-protein diet with the low-protein diet. Fish (initial average body weight, 10.82 ± 0.14 g) were fed with respective experimental diets three times a day until apparent satiation. The optimum biological level of BDP was calculated as 326 g/kg (dry-matter basis) by the quadratic regression model for maximum body weight gain of juvenile pacu. To maximize economic returns (US$/kg) for different end products, the optimum economic levels of BDP were calculated as 311, 317 and 319 g/kg (dry-matter basis) by an economic model for whole-body, eviscerated and sliced juvenile pacu respectively. This finding revealed that obtaining maximum biological performance of fish in the case of high feed costs or low prices of the end product in consumer market would substantially reduce the economic returns.
Aquaculture Center São Paulo State University – UNESP
School of Agricultural Engineering and Environmental Sciences University of KwaZulu–Natal
Department of Veterinary Medicine Brazil University – Univ. Brasil
Department of Animal Science Faculty of Agricultural and Veterinary Sciences São Paulo State University – UNESP
Aquaculture Center São Paulo State University – UNESP
Department of Animal Science Faculty of Agricultural and Veterinary Sciences São Paulo State University – UNESP
FAPESP: 2013/25761–4
