Effect of feeding different types of β-glucans derived from two marine diatoms (Chaetoceros muelleri and Thalassiosira weissflogii) on growth performance and immunity of banana shrimp (Penaeus merguiensis)

Pooljun, Chettupon; Jariyapong, Pitchanee; Wongtawan, Tuempong; Hirono, Ikuo; Wuthisuthimethavee, Suwit

doi:10.1016/j.fsi.2022.09.047

Cited by 9 publications

(1 citation statement)

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“…β-Glucan is a complex polysaccharide present in grains, seaweeds, mushrooms, yeast and certain bacteria, distinguished by the presence of pathogen-associated molecular patterns (PAMPs) in molecules with immunomodulatory activity [ 21 ]. β-Glucan can improve the immunity and disease resistance of crustaceans, including tiger shrimp ( Penaeus monodon ) [ 22 ] and banana shrimp ( Penaeus merguiensis ) [ 23 ]. Feeding L. vannamei 0.2% β-glucan has positive effects on growth performance [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Dietary β-Glucan Levels on Antioxidant Capacity and Immunity, Gut Microbiota and Transcriptome Responses of White Shrimp (Litopenaeus vannamei) under Low Salinity

Qiao

Zhou

et al. 2022

Antioxidants

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β-Glucan could significantly improve the antioxidant capacity of aquatic animals. The effects of different dietary levels (0 (control), 0.05, 0.1, 0.2 or 0.4%) of β-glucan on the growth, survival, antioxidant capacity, immunity, intestinal microbiota and transcriptional responses of Litopenaeus vannamei under low salinity (≤3) were investigated. The dietary growth trial lasted 35 days (initial shrimp 0.26 ± 0.01 g). The results indicated that the growth performance of the 0.1% and 0.2% groups was significantly better than that of the control group. A second-order polynomial regression analysis of growth performance against dietary β-glucan indicated that the optimal dietary β-glucan level was 0.2% of dry matter. The digestive enzyme activity of the hepatopancreas was enhanced with increasing β-glucan levels. The antioxidant and nonspecific immunity capacities of the hepatopancreas were also enhanced in the 0.1% group. The α-diversity index analysis of the intestinal microbiota showed that the intestinal microbial richness of L. vannamei increased in the 0.1% group. The relative abundance of Proteobacteria decreased in the 0.1% group compared with the control group. The transcriptome results indicate that the prebiotic mechanisms of β-glucan include upregulating the expression of nonspecific immune genes and osmoregulation genes and activating KEGG pathways associated with carbohydrate metabolism under low-salinity stress. These results suggested that dietary supplementation with β-glucan markedly increased growth performance and alleviated the negative effects of low-salinity stress by contributing to the activity of biochemical enzymes and enriching carbohydrate metabolism in L. vannamei.

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