关键词: 蓝花长尾鲫（Carassius auratus）, 开口饵料, 开口率, 成活率

Abstract: Artificial reproduction experiments were conducted on blue-tailed crucian carp （Carassius auratus） using dry insemination. After hatching, the larvae were fed with three types of open mouthed feed： Artencia salina, Tubificidae, and artificial compound feed. The results showed that the fertilization rate and hatching rate of blue tailed crucian carp were 89.85% and 80.48%, respectively;the initial opening rate and survival rate of the Artencia salina group were 98.89% and 98.91%, respectively. The initial opening rate and survival rate of the Tubificidae group were 94.44% and 97.33%, respectively. The initial opening rate and survival rate of the artificial compound feed group were 74.44% and 98.24%, respectively;the initial opening rate of the Tubificidae group and the Artencia salina group was significantly higher than that of the artificial compound feed group （P<0.05）, while there was no significant difference in the initial opening rate between the Tubificidae group and the Artencia salina group （P>0.05）;there was a significant difference （P<0.05） in the plumpness of the three groups of Tubificidae group, Artencia salina group, and artificial compound feed group, but the difference in survival rate among the three groups was not significant （P>0.05）. It was suggested that the blue-tailed crucian carp fry should be fed with palatable Artemia salina in the early stage of cultivation, and artificial compound feed should be used on the basis of Artemia salina in the middle and later stages to reduce breeding costs.

Key words: blue tailed crucian carp （Carassius auratus）, opening bait, opening rates, survival rate