陆基圆池循环水条件下饥饿周期对乌鳢生化指标和养殖水

Effects of Starvation Cycle on Biochemical Indexes and Aquaculture Water Quality of Channa argus under Land-Based Circular Pond Recirculating Aquaculture

摘要: 为探索陆基圆池循环水条件下不同饥饿周期投饲模式对乌鳢(Channa argus)生化指标和养殖水质的影响。本实验以生产性陆基圆池(直径为8 m)为养殖设施，设置周期性饥饿1 d复投喂3 d (S1F3组)、周期性饥饿1 d复投喂6 d (S1F6组)、周期性饥饿1 d复投喂9 d (S1F9组)和正常投喂(S0组)共4个实验组，实验所用乌鳢初体重为10.25 ± 0.32 g，实验周期60 d。研究结果表明：(1) 各实验TC和TC含量低于S0组，且随着复投喂时间的延长，TC和TG含量逐渐提升，S1F9组最高，S1F6组次之。(2) 从肝脏组织来看，S0组肝细胞组织较为完整，肝细胞空泡化程度实验组比S0组严重，空泡率最多为S1F9组，S1F3和S1F6组肝脏组织受压迫最为严重。(3) 从水质方面来看，周期性饥饿复投喂能改善水质，基于水质评价，S1F6组水质评价等级最高。综上所述，周期性饥饿复投喂能降低脂肪代谢水平，导致肝细胞组织出现结构性损坏，同时水质得到改善；试验组中，S1F6组水质最好，脂质代谢水平下降和肝细胞受损均较小，因此，本研究建议采用S1F6投饲模式养殖乌鳢。

Abstract: To explore the effects of different feeding patterns under cyclic starvation conditions in a land-based circular pond on biochemical indicators and aquaculture water quality of Channa argus. This experiment utilized a productive land-based circular pond (with a diameter of 8 meters) as the culture facility, setting up four experimental groups: periodic starvation for 1 day followed by feeding for 3 days (S1F3 group), periodic starvation for 1 day followed by feeding for 6 days (S1F6 group), periodic starvation for 1 day followed by feeding for 9 days (S1F9 group), and normal feeding (S0 group). The initial body weight of the Channa argus used in the experiment was 10.25 ± 0.32 g, and the experimental period was 60 days. The research results indicated that: (1) The TC and TG content in all experimental groups was lower than that in the S0 group, and with the extension of re-feeding time, the TC and TG content gradually increased, with the S1F9 group being the highest, followed by the S1F6 group. (2) From the perspective of liver tissue, the liver cell tissue of the S0 group was relatively complete, and the degree of vacuolation of liver cells in the experimental groups was more severe than that in the S0 group, with the highest vacuolation rate being in the S1F9 group, and the liver tissue of the S1F3 and S1F6 groups was the most severely compressed. (3) From the perspective of water quality, periodic starvation and re-feeding could improve water quality, and based on water quality evaluation, the S1F6 group had the highest water quality rating. In summary, periodic starvation and re-feeding could reduce the level of fat metabolism, leading to structural damage of liver cell tissue, while water quality is improved; among the experimental groups, the S1F6 group had the best water quality, with a smaller decrease in lipid metabolism levels and less liver cell damage. Therefore, this study suggests adopting the S1F6 feeding pattern for culturing Channa argus.