| Full text | |
| Author(s): |
Mansano, Cleber F. M.
[1]
;
Silva, Edney P.
[2]
;
Khan, Kifayat U.
[3]
;
Macente, I, Beatrice
;
Nascimento, Thiago M. T.
[3]
;
Sakomura, Nilva K.
[2]
;
Fernandes, Joao B. K.
[3]
;
Takahashi, Leonardo S.
[4]
Total Authors: 8
|
| Affiliation: | [1] I, Brazil Univ, Campus Fernandopolis, Fernandopolis, SP - Brazil
[2] Sao Paulo State Univ UNESP, Fac Agr & Vet Sci FCAV, Jaboticabal, SP - Brazil
[3] Sao Paulo State Univ UNESP, Aquaculture Ctr, Jaboticabal, SP - Brazil
[4] Sao Paulo State Univ UNESP, Coll Agr & Technol Sci FCAT, Dracena, SP - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Latin American Journal of Aquatic Research; v. 49, n. 4, p. 608-619, 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
The present study aimed to estimate digestible protein (DP) requirements for maintenance and growth and assess the efficiency of protein utilization in pacu (Piaractus mesopotamicus) juveniles. A complete randomized design consisted of seven treatments, and five replicates (tanks) per treatment was used. After a one-week acclimation period, 350 pacu juveniles of 27.48 +/- 1.8 g (initial average body weight - BW) were equally distributed among 35 tanks (10 fish per tank) of 450 L. Fish were fed with seven graded digestible protein levels (64.5, 111.8, 164.6, 217.1, 264.4, 316.2 and 369.5 g kg(-1)) three times a day until apparent satiation for 120 days. The monomolecular model parameters including nitrogen maintenance requirement (NMR) (37.76 mg BW0.67 kg(-1) d(-1)), daily nitrogen deposition (ND) (194.8 mg BW0.67 kg(-1) d(-1)), and protein intakes (based on metabolic BW) of 1638, 1902, and 2241 mg kg(-1)BW(0.67) d(-1) for 75, 80 and 85% maximum theoretical nitrogen retention (NRmaxT), respectively and the efficiency of protein utilization (529x10(-6)) were estimated through the relationship between nitrogen intake (NI) and ND. The digestible protein requirements for 75, 80, and 85% of NRmaxT were estimated as 187, 217, and 256 g kg(-1) respectively by the monomolecular model based on the daily feed intake of 2% of live BW of pacu juveniles. (AU) | |
| FAPESP's process: | 13/25761-4 - Modeling production and nutritional requirements of poultry and fish |
| Grantee: | Nilva Kazue Sakomura |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 16/11016-3 - Determining in vivo fish body composition method by the use of non-invasive technique |
| Grantee: | Cleber Fernando Menegasso Mansano |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |