| In this paper, we haved done some study about that using the seawater which was treated by the micro-nano-catalytic electrolysis technology to cultivate Orange-spotted grouper. The result showed that the effect of disinfection and sterilization to seawater is very significant and the sterilizing rate could be 100% when the treatment intensity was 1.06 W?h/t. And the cost was 0.00053 yuan per one ton seawater. The highest tolerance intensity for the grouper fry was 4.08 W?h/t. And under this intensity, it could reach the best effect of sterilization and continuous bacteriostatic. And this intensity could be used in practical production of offspring seed. There are histological research to major organs of fry from the period of Larval fish to the period of juvenile fish,the research analyzed the morphological structure of organs in the process of its developing, The results show that there are some connection among the heart, kidneys, gills and some connection among the digestive tract, liver, pancreas in the period organ development. The research for choices of weaning food and rotifers fortification methods show that:the growth rate of fish body length attained 39.1% and the survival rate was 88.2% if using fertilized eggs of Oyster + BP mixed feeding as weaning food, its effect was significantly better than a single fertilized eggs of Oyster or a single BP; Chlorella mixed with cod liver oil to be fortified against rotifers,making growth rate of fish body length attained 69.2%, which is better than a single chlorella or cod liver oil. Found that there are some pathological changes occurred in liver, pancreas, kidneys, gills et al and blood of sick fish, reason for death that is due to hypoxia which is caused by congestion in Gill, but the cause of those pathological changes is unclear and pending further study. |
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