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Phosphorus Absorption and Excretion in Hybrid Sturgeon (Huso dauricus female X Acipenser schrenckii male) Intubated with Different Ca/P Ratios

文献类型： 外文期刊

作者： Jin, Jiali 1 ; Chu, Zhipeng 1 ; Ruan, Rui 1 ; Liu, Wei 1 ; Chen, Xihua 1 ; Li, Chuangju 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan 430223, Peoples R China

关键词： Ca; P ratio; P absorption; P excretion; hybrid sturgeon; intubation

期刊名称：FISHES （ 影响因子：3.17； 五年影响因子：3.098 ）

ISSN：

年卷期： 2022 年 7 卷 3 期

页码：

收录情况： SCI

摘要： To study the effect of Ca/P ratio on the P and Ca absorption and excretion in hybrid sturgeon (Huso dauricus female X Acipenser schrenckii male), five groups of fish were intubated with 100 mg P center dot kg(-1) BW with the Ca/P ratios of 0:1, 0.25:1, 0.5:1, 1:1, and 2:1. Plasma P concentrations were significantly elevated at Ca/P ratios below 2:1, and the highest value was obtained at Ca/P ratio of 0.5:1. Plasma Ca content was significantly increased at the highest Ca/P ratio. Urine P excretion rate in the fish intubated with Ca/P ratio of 0.5:1 was significantly higher than that of the groups with Ca/P ratios of 0:1 and 2:1. The highest urea excretion rates were observed at Ca/P ratio of 0.5:1 and 1:1. The total P excretion at 48 h post intubation reached about 30 mg center dot kg(-1) BW, which was recorded for the group with Ca/P ratio of 0.5:1. The present study showed that P absorption efficiency was improved in hybrid sturgeon at Ca/P ratio of 0.5:1, indicating that P inclusion level in sturgeon feed can be further optimized to reduce dietary P input and lower the excessive undigested P discharge into the rearing water.

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