EVALUATION OF DUCKWEED (LEMNA-PERPUSILLA AND SPIRODELA-POLYRRHIZA) AS FEED FOR NILE TILAPIA (OREOCHROMIS-NILOTICUS)
EVALUATION OF DUCKWEED (LEMNA-PERPUSILLA AND SPIRODELA-POLYRRHIZA) AS FEED FOR NILE TILAPIA (OREOCHROMIS-NILOTICUS)
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DOI：
10.1016/0044-8486(92)90213-5
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发表时间：
1992-06-15
期刊：
影响因子：
4.5
通讯作者：
EDWARDS, P
中科院分区：
文献类型：
--
作者：
HASSAN, MS;EDWARDS, P
在室外5 m2静水混凝土水槽中进行了为期70 d的试验，研究了新鲜浮萍（Lemna perpusilla和Spirospiropyrrhiza）作为尼罗罗非鱼饲料的营养价值。浮萍和螺旋藻进行了比较，在实验1中，每日摄食率为2.5，5.0和7.5%的总鱼体重的浮萍干重的基础上。由于浮萍是一种更合适的饲料罗非鱼的生长速度和饲料利用效率的基础上，最佳的每日投喂率的浮萍在实验2中确定投喂率从1至6%的总鱼体重的浮萍干重的基础上。浮萍的最佳日投喂量分别为25 ~ 44 g、45 ~ 74 g和75 ~ 105 g鱼体总重量的5%、4%和3%（以浮萍干重计）。
Two 70-day experiments were conducted in outdoor 5-m2 static-water concrete tanks to determine the nutritional value of fresh duckweed (Lemna perpusilla and Spirodela polyrrhiza) as feed for Nile tilapia (Oreochromis niloticus). Lemna and Spirodela were compared in Experiment 1 at daily feeding rates of 2.5, 5.0 and 7.5% of total fish body weight on a duckweed-dry-weight basis. As Lemna was a more suitable feed for tilapia on the basis of growth rate and feed utilization efficiency, optimal daily feeding rates of Lemna were determined in Experiment 2 by feeding at rates from 1 to 6% of the total fish body weight on a duckweed-dry-weight basis. The optimal daily feeding rates of Lemna were 5, 4 and 3% of the total fish body weight on a duckweed-dry-weight basis for fish of 25 to 44 g, 45 to 74 g and 75 to 105 g in weight, respectively.