China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (5): 1452-1458.doi: 10.16431/j.cnki.1671-7236.2020.05.019

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Effects of Additive Amount of Antimicrobial Peptides on Biochemical Indices of Hybrid Sturgeon

LUO Zhicheng1, LIU Zhe1, QUAN Jinqiang1, KANG Yujun1, QIN Yong2   

  1. 1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
    2. Gansu Fishery Technology Promotion Station, Lanzhou 730070, China
  • Online:2020-05-20 Published:2020-05-18

Abstract: In order to study the effect of the amount of antimicrobial peptide on the immunity-related indicators and anti-injury ability of the serum and tissue of hybrid sturgeon.200 hybrid sturgeons(Russian sturgeon Acipenser gueldenstaedti♀×Amur sturgeon Acipenser schrencki Brandt♂) with robust physique and uniform size were selected and randomly divided into 4 groups.The fishes in control group were fed with basal diet,the fishes in experiment groups were fed with composite additive of antimicrobial peptides with level of 400 mg/kg (group Ⅰ)、800 mg/kg (group Ⅱ) and 1 200 mg/kg (group Ⅲ),respectively.The experiment lasted for 30 d at water temperature of (16.0±1.0) ℃.It was found that the contents of albumin (ALB) and total protein(TP) in serum and tissues were increased at first and then decreased with the increase of dietary antimicrobial peptides concentration,and the contents of ALB and TP in groupⅡ significantly higher than the control group (P<0.05).The activities of lactic dehydrogenase (LDH) and glutamic oxalacetic transaminase (GOT) were shown to be decreased at first and then increased with the increase of antimicrobial peptides concentration in serum.In serum and tissues the activity of GOT in groupⅠwas significantly lower than that in other groups (P<0.05),and the activity of GOT and LDH in group Ⅲ were significantly higher than those in other groups (P<0.05).The total cholesterol (TCHO) contents were gradually decreased with the increase of the concentration of antimicrobial peptides in tissues,and the TCHO contents in group Ⅲ were significantly lower in tissues than those in other groups (P<0.05).The activity of lysozyme (LZM) was gradually increased with the increase of the concentration of antimicrobial peptides,and the activity of LZM was significantly higher in groupⅡ and groupⅢ in heart,spleen and small intestine than that in other groups (P<0.05).The addition of antimicrobial peptides leaded to effectively improve the nonspecific immunity and the damage resistant ability of hybrid sturgeon,and antibacterial peptides had the best effect when the dosage was 400-800 mg/kg.

Key words: antimicrobial peptide; biochemical index; hybrid sturgeon; immunity ability

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