Ecological Indices of Microbes on Gastrointestinal Tract of Ornamental Fishes

Authors

  • Shree Rama Mani Research Scholar, School of Aquaculture, Department of Biotechnology, Karpaga Vinayaga College of Engineering and Technology, Padalam, Chengalpet (Dt.), Tamilnadu 603308, India
  • Sivakumar Kandasamy Professor, School of Aquaculture, Department of Biotechnology, Karpaga Vinayaga College of Engineering and Technology, Padalam, Chengalpet (Dt.), Tamilnadu 603308, India

DOI:

https://doi.org/10.48165/

Keywords:

Ecological Indices, Fish, Microflora, Probiotics, Gastrointestinal Tract

Abstract

The aim of the study was to determine the  ecological indices of an apical dominance and  diversity rate of bacteria on gastrointestinal (GI)  tract of some ornamental fishes. The GI tract  bacterial strains were characterized by  biochemical methods. Eleven species of bacterial  strains were isolated belonging to the Phyla  Proteobacteria (45%), Firumicutes (10%) and  Actinobacteria (45%). Out of the eleven strains,  Aeromonas sp., Micrococcus sp. and Vibrio sp.,  predominantly occurred in the GI tract. Total  viable count of Vibrio metschnikovii (5.93x107 ± 0.2x107 CFU/ml) was significantly higher in  Tanichthys albonubes and Micrococcus varians (9.42x102 ± 0.75x102 CFU/ml) was the least in  Parachromis managuensis compared to other  strains. Ecological indices of diversity and  dominance have shown that out of ten  ornamental fishes, Tanichthys albonubes has higher  dominance of 0.993 and Cichla ocellaris has higher  diversity and species richness of 0.509 and 0.806,  respectively. The obtained results will create an  impact on the aqua environment thereby  decreasing an anthropogenic consequence of  fishes. In future, the aforesaid positive aspect will  be taken into consideration for formulating  probiotics from gut microflora which probably  will increase the endurance and health of fishes. 

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Published

2020-08-15

Issue

Vol. 39 No. 2 (2020): Bulletin of Pure and Applied Sciences Zoology (Jul-Dec) 2020

Section

Research Paper

How to Cite

Ecological Indices of Microbes on Gastrointestinal Tract of Ornamental Fishes . (2020). Bulletin of Pure & Applied Sciences- Zoology , 39(2), 288–298. https://doi.org/10.48165/