3. Results
3.1. Direct use value of aquaculture
Aquaculture farming in the study area included shrimp mainly tiger prawn (Penaeus monodon), sea
crab (Scylla paramamosain), and brackish fishes including Latescalcarifer and Oreochromis niloticus as
well as seagrasses (Gracilaria spp.). Extensive and improved extensive shrimp farms were the main types
of aquaculture in the study area.
Table 1 compares the average shrimp pond size per household of aquaculture farming types. On
average, the shrimp pond size per household in Trang Cat commune was 12.81 ha. The same situation
occurred in Northern Vietnam. Pond size in the North where they used the tidal cycle to feed shrimps and
sea crabs were huge and larger in the South [7]. Pond size in Trang Cat commune was fifty three times
higher than that of Bang La commune. The pond size in Bang La was tiny with only 0.24 ha per
household on average (Table 1)