南极磷虾粉对大菱鲆生长、非特异性免疫及氟残留的影响

以鱼粉、南极磷虾粉和豆粕为蛋白源,以南极磷虾粉蛋白分别替代饲料中的0(对照组)、20%、40%、60%的鱼粉蛋白制成4种等氮等能的饲料,并以此饲料饲喂大菱鲆(37.36±2.12g)56d。试验结果显示,饲料中南极磷虾粉水平对大菱鲆的成活率及特定生长率(SGR)没有显著性影响(P>0.05);对各组的饲料干物质表观消化率均有显著性影响(P<0.05),替代40%组与替代60%组蛋白质表观消化率较对照组有显著性差异(P<0.05);对大菱鲆血清中的碱性磷酸酶(AKP)、酸性磷酸酶(ACP)、溶菌酶及总超氧化物歧化酶(T-SOD)活力无显著性影响(P>0.05)。大菱鲆各组间肌肉中氟残留量没有显著性差异(P>0.05),且肌肉中氟含量均在可食用范围内,大菱鲆各组间骨骼中氟残留量均有显著性差异(P<0.05)。

Effect of different level of Antarctic krill meal on growth, non-specific immunity and fluoride retention in diets of turbot Scophthalmus maximus

The effects of partial replacement of fish meal (FM) with meal made from Antarctic krill Euphausia superba as protein source in the diets for turbot Scophthalmus maximus on growth, non-specific immunity and fluoride retention were studied. Four experimental diets were prepared using an FM diet as the control. The other diets included Antarctic krill where 20%, 40% or 60% of the dietary FM protein was replaced by the protein from Antarctic krill. All diets were iso-nitrogenous and iso-caloric. Four diets were fed to groups of turbot(37.36±2.12 g) for 8 weeks. Experimental results showed that in fish fed diets containing Antarctic krill, survival, specific growth rate (SGR), alkaline phosphatase(AKP), acid phosphatase (ACP), lysozyme (LZM) and total superoxide dismutase(T-SOD)were significantly different compared with fish fed the control diet(P>0.05). The apparent digestibility of each experimental group has significant difference (P<0.05), and the protein digestibility rate of 3(40) group and 4(60) group had significant difference with the control group (P<0.05). The fluoride retention in muscles of each experimental group has no significant difference (P>0.05), but in bones, each experimental group has significant difference (P<0.05).