An Investigation into Occasional White Spot Syndrome Virus Outbreak in Traditional Paddy Cum Prawn Fields in India

Table 1

Water quality parameters of the feeder canal and the shrimp farms (mean value ± SD).

Parameter	Feeder canal	Perennial pond-1	Perennial pond-2	Seasonal pond-1	Seasonal pond-2
Temperature (°C)	29.95±2.01; (27–36)*	30.75±2.19; (28–36)	30.65±2.23; (28–37)	30.45±1.95; (28–36)	31.10±2.26; (28–37)
Salinity (ppt)	11.45±9.48; (0–30.00)	10.51±7.92; (0–27.50)	10.41±9.51; (0–30.80)	10.82±9.61; (0–30.30)	10.63±8.07; (2.97–29.00)
Dissolved oxygen (mg/L)	3.16±1.59; (0.8–7.42)	5.23±1.62; (2.0–7.01)	6.70±1.79; (3.71–10.30)	6.62±2.82; (2.88–13.00)	8.31±2.80; (4.50–13.80)
pH	7.30±0.2; (6.90–7.90)	7.60±0.3; (7.27–8.40)	8.00±0.5; (6.61–8.90)	7.68±0.5; (6.86–8.60)	8.50±0.8; (7.30–9.70)
Alkalinity (mgCaCO3/L)	62.40±15.10; (24–84)	67.00±15.23; (36–92)	62.60±22.3; (16–92)	60.00±18.17; (20–88)	68.20±17.53; (20–88)
Total hardness (mgCaCO3/mL)	1684.2±1230.192; (300–3820)	1695.8±1066.57; (300–3600)	1647.0±1276.354; (368–4200)	1695.0±1328.06; (400–4400)	1698.0±1172.346; (580–3900)
TAN (mg/L)	0.1958±0.15; (0.00394–0.64600)	0.1758±0.15; (0.05168–0.66348)	0.2498±0.4; (0.00608–1.87112)	0.1647±0.15; (0.01596–0.70680)	0.1287±0.16; (0.00608–0.65892)
Nitrite (mg/L)	0.0149±0.008; (0.00286–0.032186)	0.0102±0.008; (0.00078–0.03059)	0.0214±0.010; (0.00390–0.046284)	0.01504±0.010; (0.000782–0.029792)	0.0185±0.02; (0.00442–0.044688)
Nitrate (mg/L)	0.1748±0.09; (0.057860–0.428164)	0.1205±0.062; (0.02893–0.219868)	0.1930±0.08; (0.046288–0.352946)	0.1397±0.07; (0.052074–0.266156)	0.1379±0.08; (0.005786–0.266156)
Phosphate (mg/L)	0.1840±0.109; (0.05410–0.40254)	0.2728±0.34; (0.06924–0.39168)	0.2928±0.18; (0.12334–0.87425)	0.1998±0.12; (0.03462–0.42631)	0.1658±0.10; (0.01948–0.37437)

*Value in parentheses indicates range.