Date Received: Aug 12, 2025
Date Accepted: Oct 08, 2025
Date Published: Dec 31, 2025
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Spatiotemporal Dynamics of Water Quality in Intensive Coastal Aquaculture of Shrimp and Clams in Nam Dinh Province, Vietnam
,
Nguyen Duc Binh
1
,
Pham Thi Thanh
1
,
Nguyen Thi Minh Nguyet
1
,
Tong Tran Huy
1
,
Nguyen Thi Thu Ha
1
,
Mai Dang Nhan
2
,
Vu Duc Duy
2
,
Luu Thi Ha Giang
1
,
Pham Thai Giang
2
Keywords
Nam Dinh, intake water, shrimp farming, clam farming, water quality
Abstract
Coastal aquaculture zones, including areas for shrimp and mollusk farming, are subject to multiple stressors, such as internal farming activities, inland runoff, and extreme weather events. These factors contribute to spatiotemporal fluctuations in water quality, directly affecting aquaculture productivity and sustainability. This study aimed to assess the current status of the water quality in the shrimp and clam farming areas across the Nam Dinh coastal districts identify the spatial and temporal variation trends, and propose appropriate management measures. Environmental parameters, including pH, dissolved oxygen (DO), salinity, alkalinity, COD, ammonium (N-NH₄⁺), nitrite (N-NO₂⁻), hydrogen sulfide (H₂S), total suspended solids (TSS), and total Vibrio count, were monitored biweekly. The samples were collected on the same day between 5:00 and 7:30 a.m. The results indicated significant temporal fluctuations in water quality, with a clear deterioration trend during the rainy season and in storm-affected months, particularly in September, during the passage of Typhoon Yagi. In the shrimp farming areas, the water source quality tended to decline during June-August. Localized differences were also observed: Nghia Hung was characterized by low DO levels, while Hai Hau experienced large salinity fluctuations. In the clam farming zones, water quality was lowest in June and July. Giao Thuy exhibited a higher frequency of salinity values falling below acceptable thresholds compared to Nghia Hung, suggesting greater variability in salinity levels. These findings provide a scientific basis for local authorities and farmers to plan adaptive water management strategies, such as storing high-quality water for use during periods of environmental stress.
References
Abdel-Latif H. M. R., Yilmaz E., Dawood M. A. O., Ringø E., Ahmadifar E. & Yilmaz S. (2022). Shrimp vibriosis and possible control measures using probiotics, postbiotics, prebiotics, and synbiotics: A review. Aquaculture. 551: 737951. DOI: 10.1016/j.aquaculture.2022.737951.
Baird R. & Bridgewater L. (2017). Standard methods for the examination of water and wastewater. 23rd edition. American Public Health Association, Washington, D.C.
Boyd C. E., Aquaculture A. U. I. C. f. & Environments A. (1998). Water quality for pond aquaculture. International Center for Aquaculture and Aquatic Environments, Alabama Agricultural Experiment Station, Auburn University.
Boyd C. E. (2014). Hydrogen sulfide toxic, but manageable. Global Aquaculture Advocate. Retrieved from https://www.globalseafood.org/advocate/hydrogen-sulfide-toxic-but-manageable/?headlessPrint=o.(*R%3Ep~oOwh]d+-hYR&RIFVO_ on May 2, 2025.
Buller N. B. (2004). Bacteria from fish and other aquatic animals: A practical identification manual. CABI Publishing, London, UK.
Chen J. C. & Chen C. T. (1988). Acute toxicity of nitrite to tiger prawn, Penaeus monodon larvae. Aquaculture. 69: 253-262.
Chien Y. H. (1992). Water quality requirements and management for marine shrimp culture. In: Wyban J. (Ed.). Proceedings of the Special Session on Shrimp Farming. World Aquaculture Society: 144-156.
Epifano L. E. & Srna R. F. (1975). Toxicity of ammonia, nitrite ion, and orthophosphate to Mercenaria mercenaria and Crassostrea virginica. Marine Biology. 33: 241-246.
Fregoso-López M. G., Morales-Covarrubias M. S., Franco-Nava M. A., Ponce-Palafox J. T., Fierro-Sañudo J. F., Ramírez-Rochín J. & Páez-Osuna F. (2018). Effect of nitrogen compounds on shrimp Litopenaeus vannamei: Histological alterations of the antennal gland. Bulletin of Environmental Contamination and Toxicology. 100: 772-777.
Ganesh A., Das S., Chandrasekar K., Arun G. & Balamurugan S. (2010). Monitoring of Total Heterotrophic Bacteria and Vibrio spp. in an Aquaculture Pond. Current Research Journal of Biological Sciences. 2: 48-52.
Gross A., Abutbul S. & Zilberg D. (2004). Acute and chronic effects of nitrite on white shrimp, Litopenaeus vannamei, cultured in low-salinity brackish water. Journal of the World Aquaculture Society. 35: 315-321.
Lin Y. C. & Chen J. C. (2001). Acute toxicity of ammonia on Litopenaeus vannamei Boone juveniles at different salinity levels. Journal of Experimental Marine Biology and Ecology. 259: 109-119.
Maicá P. F., Borba M. R., Martins T. G. & Wasielesky W. Jr. (2014). Effect of salinity on performance and body composition of Pacific white shrimp juveniles reared in a super-intensive system. Revista Brasileira de Zootecnia. 43: 343-350.
Ramírez J., Frías-Espericueta M., Fierro-Sañudo J., Alarcón-Silvas S., Fregoso M. & Páez-Osuna F. (2017). Acute toxicity of nitrite on white shrimp Litopenaeus vannamei (Boone) juveniles in low-salinity water. Aquaculture Research. 48: 2337-2343.
Randa M. A., Polz M. F. & Lim E. (2004). Effects of temperature and salinity on Vibrio vulnificus population dynamics as assessed by quantitative PCR. Applied and Environmental Microbiology. 70(9): 5469-5476. DOI: 10.1128/AEM.70.9.5469-5476.2004.
Sampaio A., Silva V., Poeta P. & Aonofriesei F. (2022). Vibrio spp.: Life strategies, ecology, and risks in a changing environment. Diversity. 14: 97. DOI: 10.3390/d14020097.
Valencia-Castañeda G., Frías-Espericueta M., Vanegas C., Pérez-Ramírez J., Chavez-Sanchez C. & Páez-Osuna F. (2018). Acute toxicity of ammonia, nitrite and nitrate to shrimp Litopenaeus vannamei postlarvae in low-salinity water. Bulletin of Environmental Contamination and Toxicology. 101: 1-6.
Whetstone J., Treece G., Browdy C. & Stokes A. (2002). Opportunities and constraints in marine shrimp farming. SRAC Publication No. 2600.
Liu B., Yu Z., Song X., Jian X. & He J. (2006). The effect of acute salinity change on white spot syndrome (WSS) outbreaks in Feneropenaeus chinensis. Aquaculture. 253: 16.