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首页> 外文期刊>North American Journal of Aquaculture >Performance of a Recirculating Aquaculture System Utilizing an Algal Turf Scrubber for Scaled-Up Captive Rearing of Freshwater Mussels (Bivalvia: Unionidae)
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Performance of a Recirculating Aquaculture System Utilizing an Algal Turf Scrubber for Scaled-Up Captive Rearing of Freshwater Mussels (Bivalvia: Unionidae)

机译：利用藻类洗涤塔进行圈养圈养淡水贻贝的循环水产养殖系统的性能（双壳纲：Unionidae）

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To develop a system supporting rapid growth of juvenile freshwater mussels, a recirculating aquaculture system was designed and built at the Laboratory for Conservation Aquaculture and Aquatic Ecology, Virginia Polytechnic Institute and State University. The system included a rectangular trough tank, a sump (biofilter), a pump, a microalgae drip feeder, and an air delivery system. An algal turf scrubber (ATS) was evaluated for its potential to maintain and improve water quality within the system. Growth and survival rates of juvenile rainbow mussels Villosa iris after 90 d were compared between system units with and without ATSs. Flow rate through the culture units was approximately 23.3 L/min. Results showed no statistically significant differences between the growth and survival rates of juvenile mussels reared in systems with ATSs and those reared in systems without ATSs. Ammonia and nitrite levels were low and did not differ among treatments. However, systems with ATSs exhibited significantly lower levels of nitrate and phosphate than systems without ATSs. Our results show that freshwater mussel culture systems can be scaled up to increase production and that the use of ATSs may help to maintain water quality in recirculating aquaculture systems during long-term culture of freshwater mussels.
机译：为了开发支持淡水贻贝幼鱼快速生长的系统，在弗吉尼亚水产保护自然水产养殖和水生生态实验室，弗吉尼亚理工学院和州立大学设计并建造了循环水产养殖系统。该系统包括一个矩形槽槽，一个集液槽（生物过滤器），一个泵，一个微藻滴灌机和一个空气输送系统。对藻类洗涤器（ATS）维持和改善系统内水质的潜力进行了评估。比较了使用和不使用苯丙胺类兴奋剂的系统单位在90 d后幼体虹彩贻贝虹膜的生长和存活率。通过培养单元的流量约为23.3 L / min。结果表明，在装有ATS的系统中养殖的贻贝的生长和存活率与没有使用ATS的系统中养殖的贻贝的生长率和存活率之间没有统计学上的显着差异。氨和亚硝酸盐水平低，各处理之间无差异。但是，具有ATS的系统所显示的硝酸盐和磷酸盐水平明显低于没有ATS的系统。我们的结果表明，淡水贻贝养殖系统可以扩大规模以增加产量，而在长期养殖淡水贻贝的过程中，使用ATS可以帮助维持循环水产养殖系统中的水质。

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