Improving whiteleg shrimp (Litopenaeus vannamei) performance and water quality in low-salinity BioRAS: role of hydraulic retention time and dietary minerals

IF 2.4 3区农林科学 Q2 FISHERIES

Aquaculture International Pub Date : 2025-09-18 DOI:10.1007/s10499-025-02242-y

Dung Quang Le, Ha Thi Binh, Dao Thi Anh Tuyet, Nguyen Xuan Thanh, Pham Thi Thao Nhi, Doan Ngoc Bao, Le Van Nam, Le Minh Tuan, Nguyen Thi Nguyet, Do Manh Hao

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Abstract

Biofloc-based recirculating aquaculture systems (BioRAS) are increasingly adopted for low-salinity shrimp farming to minimize water exchange and environmental impacts. This study evaluated the effects of hydraulic retention time (HRT; 5 h vs. 20 h) and dietary supplementation of sodium (Na), potassium (K), and magnesium (Mg) on biofloc dynamics, water quality, and growth performance of Litopenaeus vannamei. Prolonged HRT (20 h) supported sustained biofloc accumulation (3.90 ± 0.20 mL L⁻¹ at day 85), whereas short HRT (5 h) showed early peaks followed by decline. Ammonia and nitrite concentrations remained within safe limits across treatments, with no direct effect of HRT on shrimp growth. In contrast, mineral supplementation significantly enhanced performance, with Treatment 2 yielding the highest final weight (12.43 ± 0.31 g) and survival (72.3 ± 2.5%) compared with the control (11.30 ± 0.62 g; 60.7 ± 4.0%). Although biofloc volumes did not differ among mineral treatments, higher microbial and Vibrio counts were recorded in Treatment 2 without negative health effects, suggesting enhanced microbial balance. These findings suggest that combining prolonged HRT with targeted mineral supplementation improves BioRAS efficiency, supporting sustainable shrimp aquaculture with reduced environmental impact.

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在低盐度BioRAS中提高凡纳滨对虾生产性能和水质：水力滞留时间和饲粮矿物质的作用

基于生物絮团的循环水养殖系统（BioRAS）越来越多地用于低盐度对虾养殖，以尽量减少水交换和环境影响。本研究评估了水力滞留时间（HRT: 5 h vs. 20 h）和饲料中添加钠（Na）、钾(K)和镁（Mg）对凡纳滨对虾（Litopenaeus vannamei）生物群落动态、水质和生长性能的影响。延长HRT（20小时）支持持续的生物絮团积累（第85天3.90±0.20 mL L - 1），而短HRT（5小时）表现出早期高峰，随后下降。氨和亚硝酸盐浓度在处理期间保持在安全范围内，HRT对虾的生长没有直接影响。相比之下，添加矿物质显著提高了生产性能，与对照组（11.30±0.62 g; 60.7±4.0%）相比，处理2的最终体重（12.43±0.31 g）和存活率（72.3±2.5%）最高。虽然生物絮团体积在矿物处理之间没有差异，但处理2中记录的微生物和弧菌数量较高，但对健康没有负面影响，这表明微生物平衡得到增强。这些研究结果表明，将长期HRT与有针对性的矿物质补充相结合可以提高BioRAS的效率，支持可持续的对虾养殖，减少对环境的影响。

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来源期刊

Aquaculture International 农林科学-渔业

CiteScore

5.10

自引率

6.90%

发文量

204

审稿时长

1.0 months

期刊介绍： Aquaculture International is an international journal publishing original research papers, short communications, technical notes and review papers on all aspects of aquaculture. The Journal covers topics such as the biology, physiology, pathology and genetics of cultured fish, crustaceans, molluscs and plants, especially new species; water quality of supply systems, fluctuations in water quality within farms and the environmental impacts of aquacultural operations; nutrition, feeding and stocking practices, especially as they affect the health and growth rates of cultured species; sustainable production techniques; bioengineering studies on the design and management of offshore and land-based systems; the improvement of quality and marketing of farmed products; sociological and societal impacts of aquaculture, and more. This is the official Journal of the European Aquaculture Society.