Effects of stocking density and artificial substrates on yield and water quality in a biofloc shrimp nursery culture

Abstract

The objective of this study was to evaluate the effect of different stocking densities and the presence/absence of two artificial substrates on water quality and production rates of marine shrimp in a biofloc shrimp nursery culture. Two experiments were performed: different stocking densities with mosquito netting substrate and the presence/absence of polyestertype substrate. The first experiment lasted 38 days, and shrimp at an initial weight of 0.013±0.010 g were stocked in 24 tanks. The second experiment lasted 35 days, and shrimp at an initial weight of 0.037±0.002 g were stocked in six tanks. Weekly biometric measurements were performed to adjust the amount of feed. Suspended solids were higher at a density of 6000 PL m −3 and mosquito netting substrate. Final weight and specific growth rate were higher in treatments with mosquito netting substrate. However, survival was significantly lower with this substrate. Yield was significantly higher at a density of 6000 PL m −3. Polyester-type substrate had no significant effect on production rates or variables of water quality. However, this substrate could reduce the production of sludge. The results indicate that it is possible to culture shrimp in nursery stage up to 6000 PL m −3 in a biofloc system.

Protein Requirement for Initial Rearing Phase of Pacific White Shrimp in a Biofloc System

“…Yield reached 1.10 kg m -3 (at 46.34 g 100 g -1 CP), which is consistent with the results of Serra et al (2015), who recorded a productivity of 1.23 kg m -3 at a density of 300 PL m -2 . However, Zhang (2011) and Legarda et al (2018) found higher rates of productivity compared to those recorded in the present study, although these results appear to be related to the higher stocking rates adopted in these studies.…”

Effects of prebiotic and molasses on water quality, growth and survival of Metapenaeus affinis and Macrobracium nipponense in vitro, without changing water or adding pellets

“…These values were expected because the use of probiotics assists in improving water quality properties. In the present study, the values of the environmental factors, including temperature, pH, dissolved oxygen and salinity were within the permissible ranges in shrimp rearing ponds (Legarda et al, 2018). growth (Maia et al, 2016).…”

Bioaugmentation of biofloc system with enzymatic bacterial strains for high health and production performance of Penaeus indicus

“…By using biofloc technology, intensive shrimp culture can be carried out with reduced water usage, pathogen free and reduced waste output 23 , 24 . In shrimp, biofloc rearing has been extensively standardized with P. vannamei in terms of growth, water quality and health 8 , 9 , 13 , 25 – 27 . This technology can be popularized further by adopting it to other species of shrimps.…”