Effects of Sanguinarine and Dandelion Extract on Growth Performance,Blood Biochemical Indices,Antioxidant Function and Intestinal Morphology and Structure in Finless Eel
The aim of this study was to investigate the effects of sanguinarine and dandelion extract on growth performance,blood biochemical indices,antioxidant function and intestinal morphology and struc-ture in finless eel.A total of 8 000 eels with mass of(20±0.1)g were selected for the experiment,which were divided into four treatment groups with five replicates of 400 eels each.The groups were as follows:basal diet group(CON group),basal diet group with 1g/kg sanguinarine(T1 group),3 g/kg dandelion extract(T2 group),and 1 g/kg sanguinarine with 3 g/kg dandelion extract(T3 group).The experimental period totaled 7 weeks,with a pre-feeding period of 2 weeks and an official period of 5 weeks.The results showed that,compared with CON group,all experimental groups had no significant effect on weight gain rate,bait coeffi-cient,specific growth rate,body length growth rate and gut growth rate of eels(P>0.05);compared with CON group,the serum TG content of all treat-ment groups was significantly reduced(P<0.05),and the serum BUN content of the T1 and T2 groups was significantly reduced(P<0.05).Com-pared with CON group,serum T-SOD activity and T-AOC was significantly lower in the T1 and T2 groups(P<0.05);CAT activity was significantly lower in the T3 group than other groups(P<0.05).Compared with CON group,small intestinal villus height was significantly higher in the T2 group(P<0.05),small intestinal crypt depth was significantly lower in the T1 group than in the T2 and T3 groups(P<0.05),and the ratio of villus height/crypt depth in the T1 group was significantly higher than CON and T3 groups(P<0.05).In con-clusion,the addition of sanguinarine and dandelion extract alone to the ration improves the intestinal mor-phology,structure and growth performance of eels.And it reduces the content of BUN and TG in the serum of eel,but fails to improve the antioxidant capacity of eel intestine.
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