Dietary lipid levels affect growth, feed utilization, lipid deposition, health status and digestive enzyme activities of juvenile Siberian sturgeon, Acipenser baerii
Dietary lipid levels affect growth, feed utilization, lipid deposition, health status and digestive enzyme activities of juvenile Siberian sturgeon, Acipenser baerii
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DOI：
10.1111/anu.13337
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发表时间：
2021-09
影响因子：
3.5
通讯作者：
Y. Ren;Shibo Wei;Huanhuan Yu;W. Xing;Guanling Xu;Tieliang Li;Lin Luo
中科院分区：
文献类型：
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作者：
Y. Ren;Shibo Wei;Huanhuan Yu;W. Xing;Guanling Xu;Tieliang Li;Lin Luo
通过为期10周的试验，研究了饲料脂肪水平对西伯利亚鲟（Acipenser baerii）幼鱼生长、饲料利用、脂肪沉积、健康状况和消化酶活性的影响。配制了6种等氮日粮，其脂肪水平分别为51.1（L5）、88.7（L9）、129.6（L13）、169.3（L17）、208.4（L21）和248.8 g/kg（L25）。投喂L17的鲟鱼生长和饲料利用率最高。较高的膳食脂质获得比L17显著更低的PPV（p<0.05）。根据增重率、PPV值估算出适宜的饲粮脂肪含量为169.9、176.0 g/kg。随着饲料中脂肪含量的增加，鱼体、肌肉和肝脏中的脂肪沉积显著增加（p<0.05）。膳食脂质水平影响血清生化指标，L21或L25组的AST、TC、LDL-C和LDL-C/TC最高，L17组的HDL-C最高。血清抗氧化剂、氧化剂和肝脏MDA含量随着日粮脂肪从51.1 g/kg增加到248.8 g/kg而保持上升趋势（p<0.05）。螺旋瓣肠脂肪酶活性随日粮脂肪含量从51.1 g/kg增加到169.3 g/kg而升高，但在208.4 g/kg和248.8 g/kg时下降（p> 0.05）。综合考虑，西伯利亚鲟幼鱼适宜的饲料脂肪含量为169.9- 176.0g/kg。
A 10‐week experiment was conducted to evaluate the effects of dietary lipid levels on growth, feed utilization, lipid deposition, health status and digestive enzyme activities of juvenile Siberian sturgeon (Acipenser baerii). Six isonitrogenous diets were formulated with lipid levels at 51.1 (L5), 88.7 (L9), 129.6 (L13), 169.3 (L17), 208.4 (L21) and 248.8 g/kg (L25). The sturgeons fed with L17 had the highest growth and feed utilization. Higher dietary lipid obtained significantly lower PPV than that of L17 (p< .05). Based on WGR, PPV, the optimal dietary lipid was estimated at 169.9, 176.0 g/kg. The lipid deposition in the whole body, muscle and liver enhanced significantly as the dietary lipid increased (p< .05). Dietary lipid levels affected serum biochemical parameters, with the highest AST, TC, LDL‐C and LDL‐C/TC in L21 or L25 group and highest HDL‐C in the L17 group. Serum antioxidants, oxidants and liver MDA content maintained upward trends with increasing dietary lipid from 51.1 to 248.8 g/kg (p< .05). Lipase activity in the spiral valve intestine increased when dietary lipid rose from 51.1 to 169.3 g/kg, but declined when lipid level up to 208.4 and 248.8 g/kg (p> .05). To sum up, the optimal dietary lipid was 169.9–176.0 g/kg for juvenileAcipenser baerii.