Investigation of Water Physicochemical Parameter Variations and Their Impact on Phytoplankton Community in Pacific White Shrimp (Litopenaeus vannamei) Culture Ponds at Shahid San&#039;ati Goater Shrimp Farm Complex, Sistan and Baluchestan Province, Iran

Aminikhoei, امینی خوئی; Ajdari, Ashkan; ٍerfanifar, Elmira; Ajang, Bijan; Pourmozaffar, Sajad

doi:10.22124/japb.2025.30498.1570

Investigation of Water Physicochemical Parameter Variations and Their Impact on Phytoplankton Community in Pacific White Shrimp (Litopenaeus vannamei) Culture Ponds at Shahid San'ati Goater Shrimp Farm Complex, Sistan and Baluchestan Province, Iran

Articles in Press

Document Type : Research Paper

Authors

¹ Offshore Fisheries Research Center, National Institute of Fisheries Research Sciences, Agricultural Research, Education and Extension Organization, Chabahar, Iran

² Agricultural Research Educations and Extension Organization (AREEO), Iranian Fisheries Science Research Institute (IFSRI), Off-shore Fisheries Research Center-Chabahar, Chabahar

³ Investigation of Water Physicochemical Parameter Variations and Their Impact on Phytoplankton Community in Pacific White Shrimp (Litopenaeus vannamei) Culture Ponds at Shahid San'ati Goater Shrimp Farm Complex, Sistan and Baluchestan Province, I

10.22124/japb.2025.30498.1570

Abstract

This study was conducted to investigate the variations in water physical and chemical parameters and their impact on the phytoplankton community in the culture ponds at the Shahid San'ati Goater site during the shrimp rearing period in the year 1403 Solar Hijri. Temporal variations in temperature, salinity, pH, turbidity, nitrate, phosphate, nitrite, and ammonia, along with the density and diversity of various phytoplankton communities in the culture ponds, were assessed. Physical parameters were measured using a portable device, while chemical parameters were determined by spectrophotometric methods. Based on the obtained results from the inlet canals and culture ponds, water temperature ranged from 29 to 35.5 °C, salinity from 10 to 42 g/L, and turbidity from 16 to 170 NTU. Concentrations of nitrate and phosphate were measured, ranging from 0.53 to 2.58 mg/L and 0.21 to 2.65 mg/L, respectively. Nitrite concentration ranged from 0.005 to 0.280 mg/L and ammonia concentration from 0.001 to 0.188 mg/L. Phytoplankton community analysis in the culture ponds revealed that the most prominent blooms were attributed to the cyanobacteria Phormidium sp. and Synechococcus sp., the diatoms Chaetoceros costatus, Navicula elegans, and Nitzschia closterium, and the dinoflagellate Prorocentrum minimum. Correlation analysis results indicated a significant relationship between water temperature variations and the phytoplankton community composition (p<0.05). An increase in water temperature from 32 to 35.5 °C led to a significant decrease in green algae density and a considerable increase in the cyanobacterial population (p<0.05). Based on the findings of this study, among the evaluated physical and chemical parameters, water temperature was identified as a key factor driving the occurrence of cyanobacterial blooms in Litopenaeus vannamei culture systems.

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