摘要
采用流水封闭式装置,测定了不同大小乌苏里拟鲿的耗氧率和窒息点及其24 h的昼夜变化情况。结果表明,大(16.97±1.94 g)、中(1.06±0.06 g)和小规格(0.10±0.01 g)乌苏里拟鲿耗氧率分别为0.160 8、0.191 2和0.275 0 mg/h.g,且各组间差异极显著(P<0.01);窒息点分别为0.411 4、0.571 9和0.865 2 mg/L,且各组间差异极显著(P<0.01)。所有规格乌苏里拟鲿晚上11:00耗氧率最高,其中大规格和中规格晚上(20:00-8:00)耗氧率持续高于白天(8:00-18:00),且分别在白天和晚上两时段内耗氧率平稳,而小规格乌苏里拟鲿昼夜耗氧率没有明显规律性变化;所有规格乌苏里拟鲿晚上平均耗氧率均高于白天。
The oxygen consumption rates and suffocation points of three sizes Pseudobagras ussuriensis were determined using enclosed device with flowing water. The change of oxygen consumption rate in 24 h was also monitored. The results show that the oxygen consumption rate of large （ 16.97±1.94 g） , medium （ 1.06±0.06 g） and small size （0.10±0.01 g） were 0.160 8, 0.191 2 and 0.275 0 mg/h g, respectively, the differences among the three sizes were extremely significant （P〈0.01） and their asphyxia pcints were 0.411 4, 0.571 9 and 0.865 2 mg/L, respectively, the differences among the three sizes were also extremely significant （P〈0.01） . All peaks of oxygen consumption rate of the three sizes appeared at around 11 ： 00 in the evening. The oxygen consumption rates of large and medium sizes during night （20： 00-8： 00） were higher consistently and stably than that during day （8： 00-18： 00）, but that of small size did not show regular change. The average oxygen consumption rates of the three sizes during night were higher than that during day.
出处
《天津农学院学报》
CAS
2012年第3期4-7,31,共5页
Journal of Tianjin Agricultural University
基金
天津市淡水养殖科技创新与成果转化基地项目"北方特种鱼乌苏里拟鲿养殖技术开发项目"(08050504)
关键词
乌苏里拟鲿
耗氧率
窒息点
Pseudobagras ussuriensis
oxygen consumption rate
suffocation point
