Open AccessEffects of Bacillus aquimaris T16 on growth, enzyme activity, and disease resistance of the Yesso scallop, Patinopecten yessoensis
Author(s) -
Ma YueXin,
Li Ming,
Liu JiChen,
Tao Wei,
Yu ZiChao,
Liu YuBin
Publication year - 2020
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/jwas.12639
Subject(s) - biology , scallop , patinopecten yessoensis , veliger , catalase , microbiology and biotechnology , enzyme , fishery , larva , biochemistry , botany
A 49‐day rearing trial was conducted to investigate the effects of Bacillus aquimaris T16 on growth, survival, and digestive and immune‐related enzyme activities in larval and juvenile Yesso scallop, Patinopecten yessoensis . Veliger larvae (Day 2 postfertilization [d2 PF]) were split into three treatments: control (provided with a diet only of microalgae), low T16 supplementation (1 × 10 4 cells/mL at final concentration), and high T16 supplementation (1 × 10 6 cells/mL at final concentration). Results showed that specific growth rates; survivals; and pepsin, amylase, and/or cellulase activities of umbo larvae (d13 PF), crawling–pediveliger larvae (d28 PF), and juveniles (d51 PF) in the low and/or high T16 supplementation treatments were significantly higher than those in the control group. Larvae and juveniles fed diets containing low and/or high T16 supplementations had significantly increased lysozyme, superoxide dismutase, and catalase activities compared with those fed the diet of microalgae. In addition, T16 protected juveniles against challenge by Vibrio splendidus . These data suggest that the addition of T16 can improve growth, enhance digestive enzyme activity, and stimulate the innate immune system of scallop larvae and juveniles and enhance the resistance of juveniles against V. splendidus .