开口饵料与蓝花长尾鲫生长及存活率的相关性

The correlation between opening bait and the growth and survival rate of blue tailed crucian carp

利用干法授精对蓝花长尾鲫(Carassius auratus)进行人工繁殖试验,待蓝花长尾鲫仔鱼孵化后,投喂丰年虾、水蚯蚓和人工配合饲料3种开口饵料。结果表明,蓝花长尾鲫的受精率和孵化率分别为89.85%和80.48%;丰年虾组的初次开口率和成活率分别为98.89%和98.91%,水蚯蚓组的初次开口率和成活率分别为94.44%和97.33%,人工配合饲料组的初次开口率和成活率分别为74.44%和98.24%;水蚯蚓组和丰年虾组的初次开口率显著高于人工配合饲料组(P<0.05),水蚯蚓组与丰年虾组的初次开口率无显著差异(P>0.05);水蚯蚓组、丰年虾组和人工配合饲料组3组的肥满度存在显著差异(P<0.05),但3组的成活率差异不显著(P>0.05)。建议蓝花长尾鲫仔鱼培育前期投喂适口的丰年虾,中后期在丰年虾基础上搭配使用人工配合饲料来降低养殖成本。

Artificial reproduction experiments were conducted on blue-tailed crucian carp(Carassius auratus)using dry insemina-tion.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 artifi-cial compound feed group were 74.44%and 98.24%,respectively;the initial opening rate of the Tubificidae group and the Artencia sa-lina 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.