The ability of tilapia to improve water quality in an intensive shrimp farming system was studied with white leg shrimp, the shrimp were cultured in intensive system with two treatments, one combined with tilapia and two without tilapia. The purpose of study was to evaluate water quality fluctuation and yield of cultured shrimp between the treatments. The study was carried out from May to August, 2014 at Phu Tan Commune, Tan Phu Dong District, Tien Giang Province. | Journal of Fisheries science and Technology Special issue - 2015 COMPARISON OF GROWTH AND WATER QUALITY AND EFFECTIVE OF WHITE LEG SHRIMP (LITOPENAEUS VANNAMEI, BOONE, 1931) CULTURED IN A SYSTEM WITH TILAPIA (OREOCHROMIS NILOTICUS) IN TAN PHU DONG DISTRICT, TIEN GIANG PROVINCE, VIETNAM Tran Van Viet1*, Nguyen Minh Nhut Quang2 ABSTRACT The ability of tilapia to improve water quality in an intensive shrimp farming system was studied with white leg shrimp, the shrimp were cultured in intensive system with two treatments, one combined with tilapia and two without tilapia. The purpose of study was to evaluate water quality fluctuation and yield of cultured shrimp between the treatments. The study was carried out from May to August, 2014 at Phu Tan Commune, Tan Phu Dong District, Tien Giang Province. The study was conducted in 3 ponds of white leg shrimp with tilapia and 3 ponds of white leg shrimp without stocking tilapia. Environmental parameters monitored were: temperature, pH, salinity, transparency, DO, COD, TSS, NO2,, and TN. There was samplings, twice per month. Results found that water quality of two treatments are appropriate for shrimp growth. It also found that TSS, COD, growth and yield differences were not significant between two treatments (p>), whereas transparency, NO2, DO, and TN were significantly different between two treatments (). According to Hai and Phuong (2009) Special issue - 2015 found that good salinity for shrimp culture is 7‰ -34‰ (Anon, 2004; Loc, 2009). Transparency: Transparency was significantly different between two treatments (), because the tilapia is stocked in large size and pellet fed in the net of the pond, so its ability to utilize algae is very limited. Fig. 3. DO (a) and COD (b) of the study through 6 times of sampling Dissolved Oxygen (DO): There are significant differences between two treatments (). Chemical Oxygen Demand (COD) fluctuated temporally during culture, however there are no significant .
