Performance of Litopenaeus vannamei postlarvae reared in indoor nursery tanks at high stocking density in clear-water versus biofloc system

摘要

The aim of this study was to compare two recirculating culture systems, clear-water (CW) vs. biofloc (BFT) system, on the performance of Litopenaeus vannamei postlarvae reared in indoor nursery tanks at four stocking densities (1500, 3000, 6000, and 9000 orgs/m(3)) during 42 days. In the study, the mean final growth weight fluctuated between 0.34 and 1.26g, with a survival range of 85.0-98.4% at the four stocking densities. In both systems, survival was not affected by stocking density. The mean final weight was higher in the culture with CW (approximate to 10.64, 0.41, 0.31, and 0.17 g/org at the stocking densities of 1500, 3000, 6000, and 9000 orgs/m3, respectively) than in the BFT system. Specific growth rate (SGR) values (CW = 9.7-11.8 and UT system = 8.6-10.1% weight increase/day) were higher at all treatments in the CW system. Our results indicate that in CW-recirculation system it is possible to obtain good production results in shrimp postlarvae nurseries under intensive farming condition. (C) 2015 Elsevier B.V. All rights reserved.