穗花狐尾藻（Myriophyllum spicatum L.）饲喂对刺参（Apostichopus japonicus）幼参生长、体成分及消化酶的影响

摘要

To investigate whether Myriophyllum spicatum can substitute Sargassum thunbergii in sea cucumber culture industry, five diets containing 0(A0), 15%(A1), 30%(A2), 45%(A3) and 60% (A4) Myriophyllum spicatum meal were formulated to identify the effect of substituting M. spicatum L. in growth performance, body composition and digestive enzymes activities. The results showed that the growth rate (GR) of sea cucumbers in group A4 was significantly higher than other groups, and that sea cucumbers in group A4 showed the best survival rate (SR) (97.78%). Significantly higher crude protein content was observed in group A4 (50.92%) compared with other groups (P<0.05). The amylase activity of group A3 (0.83 U/g prot) was significantly higher than other groups (P<0.05). The protease activity in group A4 (1.62 U/g prot) was significantly higher than all other groups (P<0.05). The results of this study provide strong evidence to replace S. thunbergii with M. spicatum L. in the sea cucumber culture industry.%为了探究穗花狐尾藻(Myriophyllum spicatum L.)替代鼠尾藻(Sargassum thunbergii)饲喂刺参(Apostichopus japonicus)幼参的效果，探讨了穗花狐尾藻添加量依次为0(对照)、15%(A1)、30%(A2)、45%(A3)和60%(A4)的5种饲料对刺参幼参[(1.66±0.61) g]生长、体成分和消化酶活性的影响。结果显示，A4组刺参的增重率(GR)显著高于其他4个组(P<0.05)，刺参成活率最高，达到了97.78%；A4组刺参的粗蛋白含量最高(50.92%)，显著高于 A0、A1和 A2组(P<0.05)；A3组刺参的淀粉酶活力最高(0.83 U/g prot)，显著高于 A0、A1与 A2组(P<0.05)；A4组刺参的蛋白酶活力最高(1.62 U/g prot)，显著高于其他4个组(P<0.05)。结果显示，穗花狐尾藻能够促进刺参生长。因此在刺参饲料中添加穗花狐尾藻，以替代资源日益匮乏的鼠尾藻是经济可行的。