Responses of hybrid sturgeon ( Huso dauricus ♀  ×  Acipenser schrenckii ♂ ) to oral administration of phosphorus

Abstract

To better understand the phosphorus (P) utilization in hybrid sturgeon (Huso dauricus ♀ × Acipenser schrenckii ♂), a combined technique with oesophageal intubation, dorsal aorta cannulation and urinary catheterization was used in the present study. Groups of five hybrid sturgeon were orally administrated with graded doses of P (0, 50, 100 and 200 mg P/kg BW) in the form of monocalcium phosphate. The high dose of P (200 mg P/kg BW) caused a significant increase in plasma P concentration. Plasma calcium (Ca) concentrations were significantly increased in the fish treated with 0 and 100 mg P/kg BW. Both P and urea excretion showed increased changing pattern with increasing P intubation level and exhibited significant higher value in 200 mg P/kg BW group. A significant increase in Ca excretion was found in the group without P supplementation (0 mg P/kg BW). ALP and SOD activity in plasma was inhibited in fish at P‐deficient groups (0 and 50 mg P/kg BW). The data in the current study showed that hybrid sturgeon at 100 mg P/kg BW treatment exhibited better P and Ca utilizations with lower waste excretion, as well as favourable status of anti‐oxidation.

Antioxidant Activity of Hybrid Sturgeon (<i>Huso dauricus</i> × <i>Acipenser schrenckii</i>) Protein Hydrolysate Prepared Using Bromelain, Its Fractions and Purified Peptides

“…Hybrid sturgeons are characterized by fast growth and high disease resistance [Luo et al, 2015]. Among the hybrid sturgeon species, the Huso dauricus × Acipenser schrenckii is the most abundant [Jin et al, 2020].…”