The purification of water quality in the overwintering parent shrimp pondfor Macrobrachium rosenbergii by using the simple filter apparatus was tested from March toApril in 1993.

In this paper, 10 mg·kg-1 of photosynthetic bacteria (PSB) and 1, 2 and 3 mg·kg-1 of Bacillus mixtures were applied to study their effects on the numbers of heterotrophic bacteria and vibrios in Penaeus monodon Fabricius broodstock culturing tank.

Gonad maturating rhythm and mating rate in Litopenaeus vannamei broodstock;

This experiment was conducted to study the domestication,maturation,spawning of 1 300 pairs of pond-reared Litopenaeus vannamei broodstock from Taiwan with body weight of 35～45 g/ind.

This study was conducted to evaluate nutritional values of the main natural diets for broodstock Litopenaeus vannamei.

A Survey on a Gymnodinium simplex Lohmann red tide in a shrimp pond in Pantu, Xiamen;

Phytoplankton communities and physical and chemical factors in different types of shrimp ponds;

Study on meat condition of Solen strictus in shrimp pond;

Primary production of phytoplankton in shrimp ponds was determined by chlorophy method at Qingdui Fisheries Corporation in Zhuang He, Dalian from May to September 1991 and compared with those by darkwhile bottle method.

The respiration rate of the larvea of polychaete ,Neanthes japanica(Izuka)and its population oxygen consumption were discribed based on the mean individual weight and biomass of this animal in the shrimp ponds in Qingdui,Zhuanghe,Liaoning province from July to Augest,1991.

In the experiment,Fenneropenaeus chinensis brooders infected by WSSV(White Spot Syndrome Virus)were exposed to different water temperatures and the mortalities were recorded over a period of 20 days.