Mathematical modeling of energy and protein utilization efficiency of feeds and foods by pacu (Piaractus mesopotamicus Holmberg, 1887)

• Grant number: 12/21937-8
• Support Opportunities: Regular Research Grants
• Start date: March 01, 2013
• End date: February 29, 2016
• Field of knowledge: Agronomical Sciences - Fishery Resources and Fishery Engineering - Aquaculture
• Principal Investigator: José Eurico Possebon Cyrino
• Grantee: José Eurico Possebon Cyrino
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Associated researchers: Gerson Barreto Mourão ; Luiz Antonio Martinelli

Abstract

The efficiency of energy and protein utilization of feeds and foods is an important factor in planning feedin strategies for fish farming. This project aims at developing models for predicting the eficiency of different process of energy and protein utilization in pacu, Piaractus mesopotamicus. In Trial 1 aims at developing models to estimate the digestibility coefficients of energy and protein and the digestible energy and protein content in commercial feeds for pacu, the explicatory variables being the physico-chemical characteristics of feeds. In Trial 2 will be defined the coefficients of factorial model of energy and protein requirements for pacu, corresponding to energy and protein requirements for maintenance and growth. The influence of lipid contents of feed on these coefficients will also be evaluated. Models to estimate body components (water, proteins, fats and ach) and body energy content as function of body weight will also be studied so enabling the application of a factorial model to define the energy and protein requirements in different body weight categories. Trial 3 will study, in semi-controlled conditions and using stable isotopes and mided models techniques, the contribution of carbon, protein and energy of natural productivity and feed. A finar trial will define the digestibility coefficients of energy and protein of natural productivity. (AU)

Scientific publications

(5)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

AGUILAR, FREDY A. A.; DA CRUZ, THALINE M. P.; MOURAO, GERSON B.; CYRINO, JOSE EURICO P.. Water temperature, body mass and fasting heat production of pacu (Piaractus mesopotamicus). Anais da Academia Brasileira de Ciências, v. 89, n. 2, p. 1305-1312, JUN 2017. (12/21937-8, 14/15618-2)

AGUILAR AGUILAR, FREDY ARMANDO; MOURAO, GERSON BARRETO; POSSEBON CYRINO, JOSE EURICO. Digestible energy and protein requirements for maintenance and growth of pacu (Piaractus mesopotamicus): A factorial approach-based model. CIENTIA AGRICOL, v. 78, n. 6, p. 9-pg., 2021-01-01. (12/21937-8)

AGUILAR AGUILAR, FREDY ARMANDO; MOURAO, GERSON BARRETO; POSSEBON CYRINO, JOSE EURICO. Digestible energy and protein requirements for maintenance and growth of pacu (Piaractus mesopotamicus): A factorial approach-based model. Scientia Agricola, v. 78, n. 6, 2021. (12/21937-8)

FREDY ARMANDO AGUILAR AGUILAR; GERSON BARRETO MOURÃO; JOSÉ EURICO POSSEBON CYRINO. Digestible energy and protein requirements for maintenance and growth of pacu ( Piaractus mesopotamicus ): A factorial approach-based model. Scientia Agricola, v. 78, n. 6, 2020-10-16. (12/21937-8)

FREDY ARMANDO A. AGUILAR; RAFAEL S.C. BARONE; GERSON B. MOURÃO; LUIZ ANTONIO MARTINELLI; JOSÉ EURICO P. CYRINO. Growth and carbon turnover of Piaractus mesopotamicus Holmberg, 1887 (Osteicthyes: Characidae): contribution of extruded feed and natural food. Anais da Academia Brasileira de Ciências, v. 96, n. 1, 2024-04-22. (12/21937-8)