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1 材料和方法 1.1 试验用鱼 本次试验用鱼捕自山海关、北戴河两海区,为缩短越冬周期,采捕推迟到1980年10月19日,共采获当年半龄鱼64条,从降低试验经费角度出发,选材规格有意偏小。红鳍东方鲀42条,重约90g,虫纹东方鲀13条,重约180g;假睛东方鲀9条,重110g。所获幼鱼无病无伤,入池后摄食正常。暂养期环境因子见表1。越冬试验在室内进行,在越冬前首先进行了饵料、温度、盐度等方面的多项小试。 表1 暂养期环境因子
1 Materials and methods 1.1 Experimental fish The test fish caught from the Shanhaiguan, Beidaihe two sea areas, in order to shorten the winter period, the harvest was postponed until October 19, 1980, a total of 64 fish were seized the same year, from the reduction test From the perspective of funding, material selection is intended to be small. Redfin Oriental 鲀 42, weighing about 90g, worm pattern Oriental 鲀 13, weighing about 180g; False eye Oriental 鲀 9, weighing 110g. The juveniles received no disease and no injury, feeding normal after entering the pool. Indigenous environmental factors shown in Table 1. Overwintering test indoors, before the winter first conducted a number of small food, temperature, salinity and other small test. Table 1 Temporary custody environmental factors