Abstract: Chinese shrimp (Penaeus chinensis) was polycultured with Taiwan red tilapia (Oreochromis mossambicus×O.niloticus) in 8 fertilized land based enclosed seawater ponds. When the density of shrimps was 0.92～2.36·m^-2 ,their survival rate was 75.72～89.98%, the yield ranged from 11.4 to 24.2 g·m^-2 after cultured for 91 days, and the productivity was 0.239 g·m^-2·d^-1. When the density of fish was 0.24·m^-2 , the stocking ratio of fish to shrimp was 1:10 , and the optimal stocking density of shrimps was 2.40·m^-2.

Key words: Seawater ponds, Chinese shrimp, Taiwan red tilapia, Fertilzation, Polyculture, high throughput, community diversity, bacterial 16S rRNA gene, net photosynthesis rate