Predation of Cyclopoid Copepods on the Theronts of Ichthyophthirius multifiliis: Shedding Light on Biocontrol of White Spot Disease

文献类型： 外文期刊

第一作者： Cao, Ze-Yi

作者： Cao, Ze-Yi;Xi, Bing-Wen;Zhou, Qing-Jie;Xie, Jun;Cao, Ze-Yi;Xi, Bing-Wen;Zhou, Qing-Jie;Chen, Kai;Xie, Jun

作者机构：

关键词： Ichthyophthirius multifiliis; theront; copepods; biocontrol

期刊名称：PATHOGENS （ 影响因子：3.7； 五年影响因子：3.7 ）

ISSN：

年卷期： 2023 年 12 卷 7 期

页码：

收录情况： SCI

摘要： White spot disease, caused by the parasitic ciliate Ichthyophthirius multifiliis, 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 I. multifiliis 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 Thermocyclops taihokuensis, Mesocyclops spp., Macrocyclops sp., and Paracyclopina 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 I. multifiliis in goldfish (p < 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.

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