美国(鱼回)鱼是我国从美国引进较为理想的淡水鱼类。研究鱼种的气体代谢,在理论上和实践上都有一定的意义。材料与方法试验在定州市鱼种场进行。实验鱼取自保定地区水产研究所试验池,是1989年7月自然繁殖的鱼种。其体长为6.8～11.2cm,体重为6.95～26.9g,体质健壮,摄食正常,放在室内大鱼缸中进行驯化。耗氧量的测定系采用测定流水中含氧量的方法进行的。实验装置仿黄玉瑶(见图1)。 The United States (fish back) is the introduction of China’s ideal freshwater fish from the United States. Studying the gas metabolism of fish species has certain significance both in theory and in practice. Materials and methods of testing in Dingzhou fish market. Experimental fish from Baoding Institute of Fisheries Experimental Pool, July 1989 natural breeding species. The body length of 6.8 ~ 11.2cm, weight 6.95 ~ 26.9g, robust physique, feeding normal, placed in a large indoor aquarium domesticated. The determination of oxygen consumption is based on a method of determining the oxygen content of the water stream. Experimental device imitation Huang Yuyao (see Figure 1).