The use of the same water over multiple culture cycles in a biofloc technology system can be
highly beneficial. This study evaluated the effect of different levels of biofloc-rich water on selected
water quality indicators and on the productive performance of Pacific white shrimp, Litopenaeus
vannamei, juveniles (3.5 g) stocked at 312 juveniles/m3 and cultured under conditions of no water
exchange. The study was performed over a 30-d period in an 800-L tank system. A total of four
biofloc enrichment levels (25, 50, 75, and 100%) and control (0%) were tested with three replicates
each. Significant differences in nitrogen compounds were found between the biofloc-enriched water
and the zero-enrichment treatment. No statistically significant differences among the biofloc-enriched
treatments were found in survival, final weight (8.25 g), and feed conversion ratio (FCR) (1.08). The
shrimp raised in clear seawater (i.e., a 0% biofloc enrichment) were significantly smaller (7.37 g vs.
8.25 g) and showed a higher FCR (1.52 vs. 1.08) than the shrimp cultured in the biofloc-rich water.
Nevertheless, no differences in yields were found between treatments. The results of this study suggest
that culture in biofloc-enriched water produces higher levels of water quality and shrimp performance
than culture in natural seawater.
The use of the same water over multiple culture cycles in a biofloc technology system can be
highly beneficial. This study evaluated the effect of different levels of biofloc-rich water on selected
water quality indicators and on the productive performance of Pacific white shrimp, Litopenaeus
vannamei, juveniles (3.5 g) stocked at 312 juveniles/m3 and cultured under conditions of no water
exchange. The study was performed over a 30-d period in an 800-L tank system. A total of four
biofloc enrichment levels (25, 50, 75, and 100%) and control (0%) were tested with three replicates
each. Significant differences in nitrogen compounds were found between the biofloc-enriched water
and the zero-enrichment treatment. No statistically significant differences among the biofloc-enriched
treatments were found in survival, final weight (8.25 g), and feed conversion ratio (FCR) (1.08). The
shrimp raised in clear seawater (i.e., a 0% biofloc enrichment) were significantly smaller (7.37 g vs.
8.25 g) and showed a higher FCR (1.52 vs. 1.08) than the shrimp cultured in the biofloc-rich water.
Nevertheless, no differences in yields were found between treatments. The results of this study suggest
that culture in biofloc-enriched water produces higher levels of water quality and shrimp performance
than culture in natural seawater.
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