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首页> 外文期刊>Aquaculture International >Water quality, phytoplankton composition and growth of Litopenaeus vannamei (Boone) in an integrated biofloc system with Gracilaria birdiae (Greville) and Gracilaria domingensis (Kutzing)
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Water quality, phytoplankton composition and growth of Litopenaeus vannamei (Boone) in an integrated biofloc system with Gracilaria birdiae (Greville) and Gracilaria domingensis (Kutzing)

机译：带有南美白cil（Gracilaria birdiae）（Greville）和多西Gra（Gracilaria domingensis）（Kutzing）的生物絮凝系统中的南美白对虾（Boone）的水质，浮游植物组成和生长

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A 28-day indoor trial was conducted to evaluate the water quality, phytoplankton composition and growth of Litopenaeus vannamei in an integrated biofloc system with Gracilaria birdiae and Gracilaria domingensis. The experimental design was completely randomized with three treatments: control (shrimp monoculture); SB (shrimp and G. birdiae) and SD (shrimp and G. domingensis), all with three replicates. Random sampling was done (6 % of total population per experimental unit) to confirm white spot syndrome Virus (WSSV) infection using nested-PCR analysis due to suspicion of presence of the virus in the experiment (treatment and control groups). Shrimp L. vannamei (2.63 +/- A 0.10 g) were stocked in experimental tanks at a density of 425 shrimp m(-3), and the Gracilaria was stocked at a biomass of 2.0 kg m(-3). Shrimp mortality began in both the experimental and control groups at 10 days of culture. The integrated biofloc system (shrimp and seaweed) increased settleable solids (by 26-52 %); final weight (by 6-21 %); weekly growth (by 17-43 %); weight gain (by 17-43 %); specific growth rate (by 16-36 %); and yield (by 5-7 %) and decreased feed conversion ratio (by 21-28 %) and Cyanobacteria density about 16 % as compared to the control (shrimp monoculture). The use of red seaweed Gracilaria in an integrated biofloc system can enhance shrimp growth and reduce Cyanobacteria density in the presence of WSSV.
机译：进行了一项为期28天的室内试验，以评估在南美白Gra和鸟and的综合生物絮凝系统中南美白对虾的水质，浮游植物组成和生长情况。实验设计完全随机分为以下三种处理：对照（​​虾类单培养）; SB（虾和G. birdiae）和SD（虾和G. domingensis），均具有三个重复。由于怀疑在实验中（治疗组和对照组）存在病毒，使用巢式PCR分析进行了随机采样（每个实验单位占总人口的6％），以确认白斑综合症病毒（WSSV）感染。南美白对虾（2.63 +/- A 0.10 g）以425虾m（-3）的密度放到实验池中，而江cil的生物量为2.0 kg m（-3）。在培养10天后，实验组和对照组的虾死亡率都开始增加。集成的生物絮凝剂系统（虾和海藻）增加了可沉降固体含量（26-52％）;最终重量（降低6-21％）;每周增长（增长17-43％）;体重增加（17-43％）;具体增长率（16-36％）;与对照相比（虾单一培养），产量（5-7％）降低了饲料转化率（21-28％），蓝细菌密度降低了约16％。在存在WSSV的情况下，在集成的生物絮凝剂系统中使用红海藻Gra草可以增强虾的生长并降低蓝细菌的密度。

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