海星棘皮投喂仿刺参(Apostichopus japonicus Selenka)的效果

在饲料中添加海星棘皮，与两组商品饲料分别投喂体重为5.0–6.7 g的仿刺参(Apostichopus japonicus Selenka)，进行60 d养殖试验，研究其对仿刺参平均增重率(AWGR)、特定生长率(SGR)、饲料系数(FCR)、摄食率(FR)和蛋白表观消化率(APD)的影响。结果显示，各组仿刺参生长良好，成活率无显著差异(P>0.05)；60 d时，各组仿刺参的AWGR和SGR变化趋势相同，由高到低依次为市售2组、海星组、市售1组；海星饲料组仿刺参的FCR最低，与其他两组间差异不显著(P>0.05)；海星饲料组与市售1组的FR间差异不显著(P>0.05)，与市售2组FR间有显著差异(P<0.05)；海星饲料组仿刺参的饲料转化率(FE)明显高于其他两组(P<0.05)；海星饲料组仿刺参的APD最高，为67.28%，与市售1组的APD差异显著(P<0.05)。研究表明，添加海星棘皮可以较好地促进仿刺参的生长和提高饲料的利用，可添加到仿刺参幼参饲料中用作饲料源。

The Effects of Asterias Echino-Skin as Additive Component of the Feed on Apostichopus japonicus

To investigate the effects of different brands of commercial diets on the weight gain rate, specific growth rate, feed conversion ratio, feeding rate, and apparent protein digestibility of the juvenile sea cucumber, the juvenile sea cucumber (Apostichopus japonicus) (initial wet weight 5.0-6.7 g) were fed with the diets containing various particle diameters of Asterias echino-skin powder (two commercial feeds as control) for 60 days. The results showed that the survival rate of A. japonicus is not impacted by diets (P>0.05). The trend of the average weight gain rate was same with the specific growth rate of sea cucumber, which was higher in commercial feed 2 group and lower in commercial feed 1 group. The feed conversion ratios (FCR) of sea cucumber fed with Asterias echino-skin was the lowest (0.993) but no significant difference with the other two groups (P<0.05). The feeding rate (FR) of sea cucumber was similar between Asterias echino-skin group and commercial feed 1 group (P>0.05), but it was significantly lower than that of the commercial feed 2 group (P<0.05). The feed efficiency of sea cucumber fed with Asterias echino-skin group was significantly higher than those of other two groups that have no significant difference (P>0.05). The highest apparent protein digestibility of sea cucumber was in Asterias echino-skin group (67.28%), which was significantly higher compared with commercial feed 1 group but without significant difference compared with the commercial feed 2 group (P>0.05). These findings indicate that supplementation of Asterias echino-skin in diets could improve the growth performance and feed utilization of A. japonicus, and the Asterias echino-skin powder can be used as a feed additive.