Research On Technology Of Artemia Culture

The main objective of the study was to improve the production of Bohai Artemia cysts and evaluate its nutritional value for aquaculture.Several preliminary experiments were conducted to find the solution for solving the problem regarding yearly decline of cyst production in Bohai bay: the revolution of Bohai Artemia strain harvested from 2000 and 2002, on biometrics of the cysts and nauplii, reproduction mode; effects of salinity on the production of the cysts; effects of nutrients in the ponds on growth of microalgae and cyst production. The results showed the characteristics of Artemia strain were not changed from 2000 to 2002, which is not the factor caused the decline of the cyst production; however, serious deficiency of nitrogen and phosphorus in the ponds was the main factor, which result in the decline of the cyst production year by year. The filed experiment indicated fertilization and control of the salinity in the ponds could significantly increase cyst production from 1.1 lg/m2 to 3.65g/m2.The nutritional value of the Bohai Artemia cysts (BH) was evaluated in second experiment. A .franciscana from Great Salt Lake (GSL) was selected as a reference species. The profile of fatty acids in newly hatched nauplii, enriched nauplii at different temperature and enriching time, enriched nauplii at different starvation time and different temperature was analyzed. After 24hr's enrichment, the content of (n-3) HUFA, especially DHA and EPA in BH Artemia was a higher than in GSL Artemia. During the following starvation of enriched nauplii, DHA and EPA in BH Artemia were more stable than GSL Artemia. BH Artemia displayed an advanced nutritional value for aquaculture.