大鲵组织营养成分与幼体摄食对比研究

来源 :2013年中国水产学会学术年会 | 被引量 : 0次 | 上传用户:hellring
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  随着养殖规模的扩大和繁育水平的提高,大鲵产业的发展需要对其营养与饲料进行深入的研究与开发。但关于大鲵特别是其幼体阶段的各项营养元素需求及消化、利用营养物的情况目前研究不足。已有文献比较集中在定性与定量测定大鲵组织的营养元素(氨基酸、脂肪酸、微量元素等)种类和比例。当前大鲵幼体期的营养来源主要依赖于活饵料,饲料系数在7左右,占养殖总成本的75%以上。鲜活饵料的较高价格、自然因素的影响、供应量的波动以及活饵料营养价值的变化给大鲵幼鱼的养殖带来了极大的不便和潜在风险。本试验利用人工饲料和红线虫分别投喂系同一大鲵母本所产且孵出日龄相同同时进入混合营养期的大鲵幼体,研究其分别摄食天然饵料与人工饲料的大鲵幼体在饵料转化率、特定生长率、生长效率等生长发育参数上的差异。经过分组投喂试验,综合各项生长指标,表明人工饲料也可作为大鲵幼体开口阶段的营养供给饵料但还需系统研究大鲵幼体摄食及消化机制、调整饲料配方、加强适口性等方面以满足幼体营养需要,促进其快速生长。
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