Effects of different water quality regulators on growth performance, immunologic function, and domestic water quality of GIFT tilapia

作者：Liang-Gang Wang, Meng-Qian Liu, Xiao‐Dong Xie, Yubo Sun, Ming-Lin Zhang, Yi Zhao, Qi Chen, Yi-Qu Ding, Meiling Yu, Zhengmin Liang, Tingjun Hu, Wanwen Liang, Yingyi Wei · 发表于：PLoS ONE · 年份：2023 · DOI：10.1371/journal.pone.0290854 · 被引用次数：9 · 研究领域：Aquaculture disease management and microbiota、Aquaculture Nutrition and Growth、Physiological and biochemical adaptations

Water quality regulation is widely recognized as a highly effective strategy for disease prevention in the field of aquaculture, and it holds significant potential for the development of sustainable aquaculture. Herein, four water quality regulators, including potassium monopersulfate (KMPS), tetrakis hydroxymethyl phosphonium sulfate (THPS), bacillus subtilis (BS), and chitosan (CS), were added to the culture water of Oreochromis niloticus (GIFT tilapia) every seven days. Subsequently, the effects of these four water quality regulators on GIFT tilapia were comprehensively evaluated by measuring the water quality index of daily growth-related performance and immune indexes of GIFT tilapia. The findings indicated that implementing the four water quality regulators resulted in a decrease in the content of ammonia nitrogen, active phosphate, nitrite, total organic carbon (TOC), and chemical oxygen demand (COD) in the water. Additionally, these regulators were found to maintain dissolved oxygen (DO) levels and pH of the water effectively. Furthermore, using these regulators demonstrated positive effects on various physiological parameters of GIFT tilapia, including improvements in final body weight, weight gain rate (WGR), specific growth rate (SGR), condition factor (CF), feed conversion ratio (FCR), spleen index (SI), hepato-somatic index (HSI), immune cell count, the activity of antioxidant-related enzymes (Nitric oxide, NO and Superoxide dismutase, SOD), and mRNA expression l...