Abstract As the demand for fish increases and limitations are placed on water use, intensification in closed aquaculture systems could help to increase its sustainable production. The Amazon region stands out for its stable warm climate with fast-growing and resilient fish. This study evaluated the efficacy of two aeration regimes on intensive rearing of tambaqui, Colossoma macropomum, in six 46.4-m3 concrete-wall earthen bottom ponds, with no water exchange. Two aeration regimes were tested: (1) emergency aeration (EA), in which the aeration system was activated with dissolved oxygen (DO) levels below 3 mg L−1; (2) supplemental aeration (SA), with 8 h of aeration every night, and also during days with low solar radiation. Water quality, fish performance and health (haematological and parasitological indicators), aeration use and cost were assessed. Juveniles (44.39 ± 9.72 g, mean weight ± SD) were stocked in six concrete-wall ponds with earthen bottoms at 32,300 ha −1 and fed commercial feed (36–32% crude protein) for 17 weeks (122 days). Mean values of the water quality parameters showed no difference between treatments, but occurrences of hypoxia were significantly higher in SA (31 hypoxias with DO

中文翻译：

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热带地区 tambaqui Colossoma macropomum 集约化养殖的曝气策略

摘要 随着对鱼类需求的增加和水资源利用的限制，封闭式水产养殖系统的集约化有助于提高其可持续生产。亚马逊地区以其稳定温暖的气候和快速生长且有弹性的鱼类而著称。本研究评估了两种曝气方式对在六个 46.4 立方米的混凝土墙土底池塘中集约化饲养 Colossoma macropomum 巨果的效果，没有换水。测试了两种曝气方式：(1) 紧急曝气 (EA)，其中曝气系统在溶解氧 (DO) 水平低于 3 mg L-1 的情况下被激活；(2) 补充曝气 (SA)，每晚曝气 8 小时，在太阳辐射低的日子里也是如此。水质、鱼类性能和健康（血液学和寄生虫学指标），对曝气使用和成本进行了评估。将幼鱼（44.39 ± 9.72 克，平均体重 ± SD）放养在 6 个土质底部的混凝土墙池塘中，面积为 32,300 公顷 -1，并饲喂商业饲料（36-32% 粗蛋白）17 周（122 天）。水质参数的平均值显示处理之间没有差异，但在 SA 中缺氧的发生率显着更高（31 次缺氧与 DO