Abstract:Investigations were conducted in 5 Litopenaeus vannamai (Pacific white shrimp) desalination culture ponds in Doumen, Zhuhai City, Guangdong Province from 15 August to 8 October, 2002. The average area of the ponds was 0.37±0.11 hm~2with water depth of 136±8cm. Culture density of L. vannamai was 131±37×10~4 individuals/hm~2. During the investigation water temperature ranged from 24.3~33.6℃, pH from 7.1~9.6 and salinity was approximately 2 to 3‰ in the pre-period of rearing, but approached to 0 in mid-period ...