Geotrichum candidum Enhanced the Enterococcus faecium Impact in Improving Physiology, and Health of Labeo rohita (Hamilton, 1822) by Modulating Gut Microbiome Under Mimic Aquaculture Conditions

Özet

The present study is designed to evaluate the impact of potential probiotics Enterococcus faecium QAUEF01 in singleand its mix-culture with Geotrichum candidum QAUGC01 on the Labeo rohita (Hamilton, 1822). In the mix-culture, bothbacteria and yeast survived comparatively better under mimic gut conditions and showed higher hydrophobicity. Moreover,mix-culture showed comparatively more antipathogenic activity. A feeding trial of 90 days for L. rohita fingerlingscomprising of three treatments, control group fed on basal diet, second group fed on E. faecium supplemented diet and thirdgroup was fed on mix-culture probiotics supplemented diet. Mix-culture probiotics fed group showed significantly higher(P<0.05) growth as compared to control. Better specific growth rate (SGR) was significantly correlated with the feedconversion ratio (FCR) and feed conversion efficiency (FCE), protease and cellulase activity in probiotic fed fishes. Theapplied probiotics established well in fish gut and shown no harmful impact on fish physiology. Probiotic applicationdistinctly modulated fish gut microbiome evident by increased level of friendly microbiota and exclusion of potential fishpathogens. The results suggested an effective eco-friendly strategy to boost the fish productivity.