Bibliographic Details
| Title: |
Stocking densities of Colossoma macropomum in the initial grow-out phase using biofloc technology. |
| Authors: |
Montelo, Renato Henrique Costa1 (AUTHOR), dos Santos, Raphael Brito2 (AUTHOR), Fugimura, Michelle Midori Sena3 (AUTHOR), Ono, Eduardo Akifumi4 (AUTHOR), Chaves, Fellipy Augusto Holanda5 (AUTHOR), Mattioli, Cristiano Campos5 (AUTHOR), Affonso, Elizabeth Gusmão1,5 (AUTHOR) pgusmao1@yahoo.com.br |
| Source: |
Aquaculture International. Dec2024, Vol. 32 Issue 7, p9933-9950. 18p. |
| Subject Terms: |
*TOTAL suspended solids, *TAMBAQUI, *FISH farming, *ELECTRIC conductivity, *INDUSTRIAL costs, *FISH stocking |
| Abstract: |
The objective was to identify the best stocking density in the initial grow-out phase of tambaqui (Colossoma macropomum) using biofloc technology (BFT) and evaluate the effects of the densities on water quality, zootechnical performance and the metabolic profile of fish and production costs. Juveniles (56.5 ± 1.69 g) were reared in the densities: 15 (BFT15), 30 (BFT30) and 45 (BFT45) fish.m−3, in triplicate, for 80 days. The use of BFT inoculum at the beginning contributed to the maintenance of adequate ammonia and nitrite concentrations at all densities, though with a higher nitrite concentration in BFT45. Electrical conductivity (EC), nitrite, total suspended solids (TSS), pH, alkalinity and hardness were different (p < 0.05) between BFT15 and BFT45. EC and TSS increased according to the increase in density, and were higher in BFT45. The highest final weight and specific growth rate were observed in BFT15, while the apparent feed conversion was lower for BFT15 and BFT30 compared to BFT45 (p < 0.05). Biomass and productivity were higher (p < 0.05) in BFT45. The values of hematocrit, number of erythrocytes and the hemoglobin concentration were higher in BFT45 (p < 0.05). Regarding production costs, the highest average feed expenditure occurred in BFT45; however, expenditure with electricity was lower at this density. The increase in biomass in BFT45 generated the reduction of the partial average cost (ACp). It can therefore be concluded that the best stocking density for initial grow out of tambaqui is 45 fish.m−3, since it presents better productivity and biomass, lower ACp and average expenditure on electricity when using BFT. [ABSTRACT FROM AUTHOR] |
|
Copyright of Aquaculture International is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Database: |
Academic Search Complete |
