The objective of this study was to evaluate the effect of the addition of Brachionus plicatilis to Litopenaeus vannamei in a nursery biofloc technology (BFT). Four treatments were used: BFT (without addition of rotifers); BFT-10 (addition of 10 rotifers mL⁻¹); BFT-20 (addition of 20 rotifers mL⁻¹) and BFT-30 (addition of 30 rotifers mL⁻¹), all in triplicate. The shrimp (3.4 ± 0.02 mg) were reared for 42 days at a density of 3000 shrimp m⁻³. The rotifers were added every 10 days (from day 1 to 30). The final weight (1.26 g) and yield (3.42 kg m⁻³) were significantly higher at BFT-30 than those from BFT. The percentage of sucrose-fermenting gram-negative bacteria increased and non-sucrose-fermenting gram-negative decreased by the end of the period. The crude protein of bioflocs was significantly higher at BFT-30 than those from BFT-10 or BFT treatments, while crude lipid of bioflocs was significantly higher at BFT-20 and BFT-30 than the BFT. The best shrimp performance was observed in BFT-30 and BFT-20, indicating the benefits of rotifers on enhancing the microbial floc content and growth to L. vannamei in BFT.

中文翻译：

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添加轮虫对南美白对虾幼虾水质、浮游生物组成及生长的影响

本研究的目的是评估在苗圃生物絮凝技术 (BFT) 中向凡纳滨对虾添加褶皱臂尾藻的效果。使用了四种处理：BFT（不添加轮虫）；BFT-10（添加 10 只轮虫 mL ^-1）；BFT-20（添加 20 只轮虫 mL ^-1）和 BFT-30（添加 30 只轮虫 mL ^-1），均一式三份。虾（3.4±0.02mg）以3000只虾m ^-3的密度饲养42天。每10天（从第1天到第30天）添加轮虫。最终重量（1.26 g）和产量（3.42 kg m ^-3) 的 BFT-30 显着高于 BFT。到该时期结束时，蔗糖发酵革兰氏阴性菌的百分比增加，非蔗糖发酵革兰氏阴性菌的百分比下降。BFT-30 处理的生物絮团粗蛋白显着高于 BFT-10 或 BFT 处理的粗蛋白，而 BFT-20 和 BFT-30 处理的生物絮团粗脂质显着高于 BFT。在 BFT-30 和 BFT-20 中观察到最好的虾表现，表明轮虫对提高微生物絮凝物含量和生长至L的益处。 BFT 中的南美白对虾。