Cao Ze-Yi, Xi Bing-Wen, Zhou Qing-Jie, Chen Kai, Xie Jun
Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China.
Key Laboratory of Aquatic Animal Nutrition and Health, Freshwater Fisheries Research Center, Chinese Academy of Fishery Science, Wuxi 214081, China.
Pathogens. 2023 Jun 22;12(7):860. doi: 10.3390/pathogens12070860.
White spot disease, caused by the parasitic ciliate , is a significant threat to the freshwater fish farming industry worldwide, resulting in massive mortality and economic losses. Eliminating the free-swimming theronts from the culture environment is considered crucial for the control of infection. It is well-documented that planktonic ciliates are valuable food resources for macro-zooplankton in aquatic ecosystems. In this study, we developed a fluorescence labeling method for alive theronts and found that cyclopoid copepods , spp., sp., and sp. present predation on the theronts in co-culture experiments. Laboratory challenge tests further confirmed that the presence of zooplankton in the culture water body significantly reduced the infection of in goldfish ( < 0.01). Results from this study revealed that cyclopoid copepods have the potential to be used as biological control agents against white spot disease in aquaculture.
由寄生纤毛虫引起的白点病对全球淡水养鱼业构成重大威胁，导致大量死亡和经济损失。从养殖环境中消除自由游动的游动孢子被认为是控制感染的关键。有充分的文献记载，浮游纤毛虫是水生生态系统中大型浮游动物的宝贵食物资源。在本研究中，我们开发了一种针对活的游动孢子的荧光标记方法，并发现剑水蚤、 种、 种和 种在共培养实验中对游动孢子存在捕食行为。实验室攻毒试验进一步证实，养殖水体中浮游动物的存在显著降低了金鱼感染 （<0.01）。本研究结果表明，剑水蚤有潜力用作水产养殖中防治白点病的生物防治剂。
