Integration of crustacean aquaculture with coastal rice farming in Vietnam

Some examples are given of integration of crustacean aquaculture into coastal rice farming in Vietnam. Freshwater prawn (Macrobrachium rosenbergii ) and marine shrimp culture integrated with coastal rice farming and crab (Scylla serrata ) culture in backyard ponds and ricefields are described.

Growth and emigration of white shimp, Litopenaeus vannamei, in the Mar Muerto Lagoon, Southern Mexico

Microcohorts of white shrimp, Litopenaeus vannamei, were sampled with a cast net at fortnightly intervals in the Mar Muerto Lagoon, Southern Mexico. Shrimp recruited to the lagoon throughout the sampling period (January to August 1993). Mean growth rates of microcohorts ranged from 0.21 to 1.21 mm total length (TL) per day. Juvenile shrimp mainly between the sizes of 70 to 80 mm TL emigrated from the lagoon. Growth and the onset of emigration appeared to be related to water salinity.