普安鲫鱼鱼苗耗氧率的初步研究

利用简易密闭的流水装置,对普安鲫(Carassius auratus)鱼苗的耗氧率进行了初步研究;选择体重为1.40～2.50 g的小规格及21.20～33.31 g大规格普安鲫鱼苗,研究其昼夜耗氧率的变化规律以及水温、体重对其耗氧率的影响。结果表明,温度对普安鲫鱼苗耗氧率有显著影响,耗氧率随温度的增加而升高,随体重的增加而降低。2种规格普安鲫鱼苗的昼夜耗氧率变化曲线基本一致,日均(7∶00～17∶00)耗氧率0.1700 mg/(g.h)与夜均(19∶00～5∶00)耗氧率0.1721 mg/(g.h)相似;其中,小规格普安鲫在23∶00出现耗氧率低峰0.1253 mg/(g.h),5∶00出现耗氧率高峰0.2647 mg/(g.h);大规格普安鲫在21∶00出现耗氧率低峰0.0909 mg/(g.h),7∶00出现耗氧率高峰0.2375 mg/(g.h)。

A Preliminary Study on the Standard Oxygen Consumption Rate of Juvenile Carassius auratus

The standard oxygen consumption rate of juvenile Carassius auratus Linnaeus(weight: 1.40-2.50 g,21.20-33.31 g) were measured.The results showed that temperature has significant effect on consumption rate of juvenile C.auratus.With the increase of the temperature,the consumption rate increased,while the consumption rate decreased when body size increasaed.The diurnal rhythm of the standard oxygen consumption 7∶00-17∶00,the average consumption rate 0.1700 mg/(g·h)] was similar to nocturnal rhythm 19∶00-5∶00,the average consumption rate 0.1721 mg/(g·h)].The standard oxygen consumption of the small size group was observed with the peak at 5∶00 0.2647 mg/(g·h)],and the minimum at 23∶00 0.1253 mg/(g·h)].The standard oxygen consumption of the large size group was observed with the peak at 7∶00 0.2375 mg/(g·h)],and the minimum at 21∶00 0.0909 mg/(g·h)].