【摘要】 对工厂化养殖的不同规格大菱鲆(Scophamus maximus Linnaeus)的日常代谢进行了研究。结果表明,4种规格的大菱鲆表现出相同的代谢规律性,摄食对大菱鲆的代谢有明显的影响,摄食后代谢率呈迅速上升的趋势。在摄食后3～9 h内代谢率出现第1高峰值,在凌晨3:00～6:00(摄食后21-24 h)出现第2高峰值,代谢率昼、夜之间的差异不显著(P>0.05)。体重对大菱鲆的代谢有着显著的影响,4种规格9.69±3.35g、33.34±8.34g、130.18±26.75g和264.11±35.79g的大菱鲆日平均耗氧率分别为0.2702±0.0225、0.1880±0.0189、0.1592±0.0436、0.1033±0.0184mgO2/g·h,日平均氨氮排泄率分别是0.6496±0.0303、0.4560±0.0669、0.3744±0.0320、0.2831±0.0662mgN/100g·h,随着体重的增加,单位体重的代谢率呈下降的趋势(P<0.05)。更多还原

【Abstract】 Metabolic rhythms of turbots of different sizes were studied. The results showed that there had apparent effects of feeding on metabolism of turbot. Shortly after feeding, the metabolic rate had an increasing trend. The four specifications of turbots showed the same disci-plinarian of oxygen consumption and ammonia excretion. The peak level of metabolic rate appeared during 3-9h after feeding, and the second peak level during 3:00-6:00 (21-24h after feeding). There was no distinct difference between metabolic rhythms in day and those at night (P>0. 05). The body weight had signif icant effect on metabolizsm of turbot (P < 0. 05), and the daily average rates of oxygen consumption of the four sizes (9.69 ± 3.35g, 33.34 ± 8.34g, 130.18 ± 26.75g and 264.11±35.79g) were 0.2702±0.0225, 0.1880±0.0189, 0.1592±0.043 6, 0.1033± 0.0184 mgO2/g·h respectively, and those of ammonia excretion 0.6496±0.0303, 0.4560± 0.0669, 0.3744±0.0320, 0.2831 ± 0.0662 mgN/100 g·h respectively.更多还原