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生产上池塘培育匙吻鲟鱼种受天气变化、昼夜温差和敌害生物的影响,成活率极低,一般在0~20%,导致养殖成本增加,不利于推广养殖。通过调控水温,探索工厂化培育匙吻鲟鱼种的最适开口饵料、培育密度、驯食规格和粗蛋白需求,结果表明,采用卤虫或枝角类作为匙吻鲟开口饵料,规格5cm开始驯食,用粗蛋白含量40%的饲料培育至20cm的大规格鱼种,成活率达到63.1%。1.材料
Production of pond nurture Key sturgeon species affected by the weather, the temperature difference between day and night and predatory organisms, the survival rate is very low, generally 0 to 20%, resulting in increased cost of breeding, is not conducive to the promotion of aquaculture. Through regulating the water temperature, the optimum opening bait, cultivating density, tame specification and crude protein requirement of industrialized key sturgeon were explored. The results showed that using Artemia or Cladocera as the feed for paddlefish, the size of 5 cm began to tame, 40% of the crude protein content of forage to 20cm large size species of fish breeding, survival rate reached 63.1%. Material