中华鲟子一代亲鱼长途运输试验

Experiment on the long-distance transport of the first generation of Chinese sturgeon

根据中华鲟子一代亲鱼个体大、体表有硬骨板等生理生态学特征，设计构建大型车载水箱运输系统（4．2×2．0×1．0）m，为防止运输途中鱼体与箱体产生碰撞，在水箱内壁加装泡沫板。运输试验在高氧、适温条件下开展（水温控制在8．9．9．8℃，溶氧含量为10．0．20．1mg／L），以氨氮含量指标作为水体可溶性有毒物质的评价标准，对其进行实时监测。结果表明：试验开始6h时水体中氨氮含量已增至O．8mg／L，此时箱内运输水体更换1，2，再注入等量的优质控温水，换水后运输水体的氨氮降到0．2mg／L以下。经过16h长途运输，亲鱼成活率100％，转入暂养池后，亲鱼能够迅速恢复正常活力。研究结果证实运用该种水箱运输系统进行中华鲟等大型鱼类的长途运输是切实可行的。

According to the physiological and ecological characteristics of the first generation of Chinese sturgeon brood stock, such as large body size, covered with bony plate, a kind of large vehicle-borne transport tank system（4.2×2.0×1.0）m was designed. In order to prevent the Chinese sturgeon crashing with the tank, special kind of foam wall was installed. The long-distance transport experiment of the first generation of Chinese sturgeon was conducted under high concentration of dissolved oxygen and suitable temperature by comprehensive regulation （the temperature of water was in the range from 8.9 ℃ to 9.8℃, the range of dissolved oxygen was 10.0-20.1 mg/L）, ammonia concentration was monitored all the time to explore the tolerant limit of Chinese sturgeon. The results showed that 6 hours after the experiment began, the ammonia concentration reached 0.8 mg/L, then half a tank of water was changed with fresh water of the same temperature, immediately the ammonia concentration got down to below 0.2 mg/L. After 16 hours＇ transportation, the survival rate of Chinese sturgeon was still 100%, when transferred to the pond, they could recover in a moment, therefore it was feasible to transport large body size fish like Chinese sturgeon in this way.