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Abstract
The study was conducted to assess the status of some physical, hydrological factors in shrimp ponds and some shrimp diseases on-sand farming area in 3 districts of Thach Ha, Nghi Xuan and Cam Xuyen, Ha Tinh. The results showed that the factors in the water including temperature, salinity and total suspended solids had the appropriate value for raising L. vannamei. Besides, most of the factors in water like DO, pH, some nutritious salts and oxygen consumedwere also within the safe range for farmed shrimp, except for high H2S content fluctuating in the range 0.25-0.43mg/L. For shrimp disease, the study focused on white spot syndrome virus (WSSV), acute hepatopancreatic necrosis disease (AHPND) and bacterial spores, (EHP) and results showed that: EHP occurred most common in white-leg shrimp cultured in Nghi Xuan, Thach Ha and Cam Xuyen in three months studied from August to October, followed by AHPND disease which appeared in September to October. WSSV disease only appeared in September in Nghi Xuan with a low infection rate (5.5%).
Key world: sand farming shrimp area, environment, diseases, Thach Ha, Cam Xuyen, Nghi Xuan