Zooplankton as an alternative method for controlling phytoplankton in catfish pond aquaculture
Zooplankton as an alternative method for controlling phytoplankton in catfish pond aquaculture
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DOI：
10.1016/j.aqrep.2021.100897
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发表时间：
2021-10-13
影响因子：
3.7
通讯作者：
Wilson, Alan E.
中科院分区：
文献类型：
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作者：
Belfiore, Angelea P.;Buley, Riley P.;Wilson, Alan E.
在池塘水产养殖中，蓝藻产生的毒素和异味化合物会对鱼类健康和产量产生负面影响。研究探索了控制水产养殖池塘中藻类大量繁殖的化学或物理方法，这些方法虽然有效，但可能是短暂的，并可能对包括水产养殖物种在内的非目标生物产生负面影响。食物网操纵在湖泊和渔业管理中有着悠久的历史，以改善水质，但在水产养殖中很少被考虑。本研究调查了美国亚拉巴马西部9个鲶鱼养殖场池塘的浮游动物和浮游植物群落、蓝藻毒素和营养物质。该项目的目标是跟踪浮游植物和浮游动物的丰度，并在努力减少和不努力减少一些池塘中的食虫鱼类。在这个项目中，养殖场管理人员减少了选定池塘中的食虫鱼丰度，以创建一个大规模的现场实验，解决了浮游动物控制浮游植物在超营养鲶鱼水产养殖池塘中的作用，当食虫鱼被排除或不被排除。浮游动物对浮游植物，包括蓝细菌，有一个强大的负面影响，尽管高营养浓度。虽然高浮游动物池塘持续升高的浮游动物生物量在本研究的大部分时间，包括当池塘温度超过30摄氏度，浮游动物对浮游植物的影响是最明显的非生长季节（11月至4月）。此外，总氨氮显着较高，在高浮游动物池塘，这可能会导致在高温和pH值升高的鱼氨毒性。我们的研究结果表明，浮游动物生物操纵可能是一种有效的方法来控制藻类水华在农场池塘鲶鱼养殖。
In pond aquaculture, production of toxins and off-flavor compounds by cyanobacteria can negatively affect fish health and production. Studies have explored chemical or physical methods for controlling algal blooms in aquaculture ponds, which although effective, may be short-lived and can negatively impact non-target organisms, including aquaculture species. Food web manipulations have a long history in lake and fisheries management to improve water quality, but have been rarely considered in aquaculture. This study examined zooplankton and phytoplankton communities, cyanobacterial toxins, and nutrients in nine catfish aquaculture farm-ponds in west Alabama, USA. The goal of this project was to track phytoplankton and zooplankton abundances with respect to each other, with and without efforts to reduce zooplanktivorous fish in some of the ponds. During this project, farm managers reduced zooplanktivorous fish abundance in select ponds to create a large-scale field experiment that addressed the role of zooplankton control of phytoplankton in hypereutrophic catfish aquaculture ponds when zooplanktivorous fish were or were not excluded. There was a strong negative effect of zooplankton on phytoplankton, including cyanobacteria, despite high nutrient concentrations. Although high zooplankton ponds sustained elevated zooplankton biomass during much of this study, including when pond temperatures exceeded 30 degrees C, the effect of zooplankton on phytoplankton was most pronounced during the nongrowing season (November-April). In addition, total ammonia nitrogen was significantly higher in high zooplankton ponds, which could lead to ammonia toxicity in fish at elevated temperature and pH. Our findings suggest that zooplankton biomanipulation may be an efficient method to control algal blooms in farm-pond catfish aquaculture.