DIETARY PHOSPHORUS REQUIREMENT OF YOUNG ABALONE, HALIOTIS DISCUS HANNAI INO |
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摘 要: |
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关 键 词: | 鲍鱼 磷 海藻 磷酸盐 核糖核酸 脱氧核糖核酸 油脂 蛋白质 |
收稿时间: | 21 September 1999 |
修稿时间: | 20 November 2000 |
Dietary phosphorus requirement of young abaloneHaliotis discus Hannai Ino |
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Authors: | Tan Bei-ping Mai Kang-sen Liufu Zhi-guo |
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Institution: | (1) Aquaculture Research Laboratory, College of Fisheries, Ocean University of Qingdao, 266003 Qingdao, China |
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Abstract: | An experiment was performed to determine the dietary phosphorus requirement of the young abalone,Haliotis discus hannai. Five semi-purified diets were formulated to provide a series of graded levels of dietary total phosphorus (0.23%–1.98) from
monobasic potassium phosphate (KH2P04). The brown alga,Laminaria japonica, was used as a control diet. Similar size abalone were distributed in a single-pass, flow-through system using a completely
randomized design with six treatments and three replicates each treatment. The abalone were hand-fed to satiation with appropriate
diets in excess, once daily at 17:00. The feeding trial was run for 120-d. Survival rate and soft-body to shell ratio (SB/S)
were constantly maintained regardless of dietary treatment. However, the weight gain rate (WGR), daily increment in shell
length (DISL), muscle RNA to DNA ratio (RNA/DNA), carcass levels of lipid and protein, soft-body alkaline phosphatase (SBAKP),
and phosphorus concentrations of whole body (WB) and soft body (SB) were significantly (ANOVA, P<0.05) affected by the dietary
phosphorus level. The dietary phosphorus requirements of the abalone were evaluated from the WGR, DISL, and RNA/DNA ratio
respectively, by using second-order polynomial regression analysis. Based on these criteria, about 1.0%–1.2% total dietary
phosphorus, i.e. 0.9%–1.1% dietary available phosphorus is recommended for the maximum growth of the abalone.
Project 39670572 supported by the NSFC. |
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Keywords: | Haliotis discus hannai phosphorus requirement monobasic potassium phosphate feeding and nutrition mollusc |
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