青蛤受精卵和幼虫密度对孵化和生长的影响

THE EFFECT OF FERTILIZED EGGS AND LARVAE DENSITY ON THE GROWTH AND HATCHING OF CYCLINA SINENSIS

本文报道了青蛤受精卵密度对孵化的影响和青蛤幼虫培养密度对生长的影响。受精卵密度在26个/ml、30个/ml、38个/ml、44个/ml、53个/ml时,孵化率在87.8～89.9％之间;受精卵密度为53个/ml时,幼虫畸形率较高。实验发现,幼虫的培养密度应控制在6～11个/ml,幼虫变态后,减少培养密度,可以提高幼虫成活率。

The paper deals with the effect of fertilized eggs density and the larvae culturing density on the hatching and growth of clam, Cyclina sinensis . When the fertilized egg density was 26 eggs/ml, 30 eggs/ml, 38 eggs/ml, 44 eggs/ml and 53 eggs/ml, the hatching rate ranged from 87. 8% to 89.9% . .The abnormal larva rate was higher when the egg density was 53 eggs/ml. In addition, the larval culture density should be controlled in 6 - 11 larvae/ml, and reduced the culture density after larvae metamorphosing, so as to raise the survival rate.