【摘要】 为研究南极大磷虾(Euphausia superba)粉对点带石斑鱼幼鱼氟蓄积和生长的影响,作者通过饲养点带石斑鱼(Epinephelus malabaricus)幼鱼(初始体质量为(3.50±0.30)g,体长(5.5±0.3)cm)100 d,在基础日粮中添加0%(对照组)、2%、4%和6%的南极大磷虾粉制成4组饲料,饲料中氟质量分数分别为145.81、202.71、257.53和317.60 mg/kg。结果显示:南极大磷虾粉中的氟在点带石斑鱼幼鱼组织中的分布程度,以脊椎骨和鳃中为最高,氟质量分数分别为(58.020~114.380)mg/kg和(46.029~123.874)mg/kg,其次是皮(含鳞片)((44.127~88.761)mg/kg),再次是肝((7.654~18.248)mg/kg),而肌肉中氟蓄积最低((3.352~3.999)mg/kg);脊椎骨、皮(含鳞片)和鳃中氟含量随饲养时间的延续而产生蓄积,且与饲料中南极大磷虾粉的水平呈正相关,肝中氟含量随饲养时间延续而产生蓄积,但与南极大磷虾粉的水平无相关性,肌肉中氟含量与饲养时间和南极大磷虾粉水平均无相关性;100 d时,4%组和6%组的特定生长率处于最高水平,且显著高于对照组(P<0.05)。本研究表明在饲料中添加4%~6%南极大磷虾粉,对点带石斑鱼幼鱼生长具有明显的促进作用。更多还原

【Abstract】 The fluoride accumulation in various tissues and the growth of juvenile grouper(Epinephelus malabaricus) after fed diets supplemented with Antarctic krill powder were analyzed. The diets were supplemented with 0%(control group), 2%, 4% and 6% Antarctic krill powder, respectively and the fluoride concentrations in the experimental feeds were 145.81, 202.71, 257.53 and 317.60 mg/kg, respectively. The four diets were fed to juvenile groupers for 100 days. The results showed that the hard tissues, such as gill and vertebra, had the highest fluoride level, followed by skin(including scale) and liver, and muscle showed the lowest fluoride retention. The level of fluoride in vertebra, skin(including scale) and gill increased with feeding time and a positive correlation between dietary fluoride from krill powder and fluoride content in these tissues was observed. The fluoride content in liver increased with feeding time as well, but with no correlation between krill powder inclusion level, while there was no correlation between krill powder inclusion level and fluoride level in the muscle of juvenile groupers. Significantly higher specific growth rate was observed in groupers fed with 4% or 6% krill powder included diets compared to that in control group(P<0.05), including krill powder in the diet at certain levels could promote the growth of juvenile grouper.更多还原