Prevention and control countermeasures on environmental pollution from shrimp culture in Guangdong;

Research progress on technology of microalgae ecological management in shrimp culture;

Application of three microbiological preparations to control of water quality in industrialized shrimp culture;

The contents of residue chloramphenicol in 3 sawples of fresh cultured prawn and 2 sawples of exported culturedprawn from Zhanjiang aquatic products market were determined by RIA.

After many years meticulous study twenty more calculation formulas in common use in prawn culture were collected and compiled calculation programmes input into the "counter for prawn culture, "thus to get rid of difficulty to remember and trouble to operate in manual calculation.

With single index method and comprehensive index method,these indices of the water quality were suit for the requirements of prawn culture,except COD over the eutrophic threshold value thus with a need for the aeration of the water.

The investigative results showed that every variety of affected cultured shrimp in Lianjiang County have the same behavioural signs.