摘要:
在8口23.2 m2的池中,于水温12.5～17.7℃、盐度30的传统养殖模式下,研究饲料中定量添加Tα1螺旋藻喂养鲍苗的培育效果。试验组和对照组分别投放壳长(3.68±0.04)mm和(3.66±0.07)mm,密度(5755±429)粒·m-2和(5 733±169)粒·m-2的鲍苗,经过133 d的养殖,鲍壳长、成活率、日增长分别达到(15.65±0.19)mm和(15.08±0.63)mm、(93.57±0.68)%和(89.25±2.48)%、(90.04±1.49)μm·d-1和(85.81±4.48)μm·d-1。结果表明:添加Tα1螺旋藻培苗,可显著提高鲍苗培育成活率(P0.05),促进鲍苗的生长(P0.05);且壳色泽好、规格较整齐。经酶联免疫吸附法(ELISA)检测鲍苗体内的胸腺素α1含量也表明,添加Tα1螺旋藻能明显提高鲍苗体内的胸腺素α1含量(P0.05)。
Abstract:
To study the effects of Tα1(thymosin α1) Spirulina in adding to juvenile abalone feeds,a comparison experiment was conducted in 8 pools of 23.2 m2 for each with water temperature 12.5～17.7 ℃ and salinity 30.Initial shell length and density of the juvenile abalone were 3.68±0.04 mm and 5 755±429 unit· m-2 for treatment group,3.66±0.07 mm and 5 733±169 unit·m-2 for control group,respectively.By the end of experiment,the shell length,survival rate,daily gain in length reached in 15.65 ± 0.19 mm and 15.08 ± 0.63 mm,93.57 ± 0.68% and 89.25 ± 2.48%,90.04 ± 1.49 μm·d-1 and 85.81±4.48 μm·d-1 for experiment and control groups,respectively.Results showed that adding Tα1 Spirulina in juvenile abalone cultivation increased survival rate(P0.05) significantly and stimulated abalone growth(P 0.05).The color of shell and uniformity of size were better in treated group than in control.With enzyme-linked immunosorbent assay(ELISA),it was found that adding Tα1 Spirulina in feeds enhanced the content of Tα1 in juvenile abalone(P0.05).
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