不同LED光谱对红鳍东方鲀幼鱼生长、摄食及消化酶活性的影响

Effects of LED spectra on growth, feeding, and digestive enzyme activities of juvenile Takifugu rubripes

为探究不同LED光谱对红鳍东方鲀(Takifugurubripes)幼鱼摄食、生长发育和生理活性的影响,选取525尾红鳍东方鲀幼鱼养殖在海水循环水养殖系统中,分别用5种不同LED光谱(红、黄、蓝、绿、白)照射处理30 d,光周期为12 L:12 D,实验期间测定饵料转化效率,实验结束时测定其存活、生长指标及消化酶活性。结果表明,不同LED光谱对红鳍东方鲀幼鱼的存活、生长和摄食的影响具有显著性差异(P<0.05)。其中绿光组红鳍东方鲀的存活率最高,为(65.71±0.00)%;绿光组红鳍东方鲀幼鱼体重最大,为(29.36±3.78) g。在饵料转化效率方面,绿光组幼鱼的饵料转换效率显著高于其他各组(P<0.05)。在消化酶活性方面,不同LED光谱处理组中红鳍东方鲀幼鱼的消化酶活性均存在显著性差异(P<0.05),其中绿光组的酸性磷酸酶、碱性磷酸酶、己糖激酶、丙酮酸激酶活性均显著高于其他各处理组(P<0.05);绿光组肝脂肪酶活性较高,显著高于蓝光与黄光组(P<0.05);绿光组肠脂肪酶活性显著高于红光、白光组(P<0.05)。综上所述,绿光对红鳍东方鲀幼鱼的生长发育具有较好的促进作用。

This study aimed to estimate the effects of different wavelengths of LED spectra on the feeding, growth and development, and physiological activities of juvenile tiger puffer(Takifugu rubripes). The juvenile fish [n= 525, body length:(9.01±0.70) cm, body weight:(18.05±3.17) g] were evenly distributed in five different LED spectra groups: white light(λ400-780 nm), red light(λ625-630 nm), yellow light(λ590-595 nm), green light(λ525-530 nm), and blue light(λ450-455 nm). The results showed that the effects of the LED spectra on the survival, growth, and feeding were significantly different(P<0.05) at the end of the experiment. The survival rate was the highest in the green light group [(65.71±8.66)%] and the lowest in the red light group [(32.86±2.02)%]. The body weight was the highest in the green light group [(29.36±3.78) g] and the lowest in the yellow light group [(21.28±2.56) g]. The blue and red light groups had the highest and lowest feeding rates, respectively. The feed conversion efficiency was significantly higher in the green light group than in the other groups(P<0.05). The acid phosphatase, alkaline phosphatase, hexokinase, and pyruvate kinase activities in the green light group were significantly higher than those in the other treatment groups(P<0.05). The liver lipase activity was higher in the green light group than in the blue and yellow light groups(P<0.05), and the intestinal lipase activity was higher in the green light group than in the red and white light groups(P<0.05). In conclusion, green light showed the greatest promotion effect on the growth and development of juvenile tiger puffer.