Reach Us +44-1477412632
Microfloral Diversity in Fish: An Editorial | OMICS International
ISSN: 2150-3508
Fisheries and Aquaculture Journal
Make the best use of Scientific Research and information from our 700+ peer reviewed, Open Access Journals that operates with the help of 50,000+ Editorial Board Members and esteemed reviewers and 1000+ Scientific associations in Medical, Clinical, Pharmaceutical, Engineering, Technology and Management Fields.
Meet Inspiring Speakers and Experts at our 3000+ Global Conferenceseries Events with over 600+ Conferences, 1200+ Symposiums and 1200+ Workshops on
Medical, Pharma, Engineering, Science, Technology and Business

Microfloral Diversity in Fish: An Editorial

Subha Ganguly*

AICRP On Post Harvest Technology (ICAR), Department of Fish Processing Technology, Faculty of Fishery Sciences, West Bengal University of Animal and Fishery Sciences, 5, Budherhat Road, P.O. Panchasayar, Kolkata - 700 094, WB, India

*Corresponding Author:
Subha Ganguly
AICRP On Post Harvest Technology (ICAR)
Department of Fish Processing Technology
Faculty of Fishery Sciences
West Bengal University of Animal and Fishery Sciences
5, Budherhat Road, P.O. Panchasayar, Kolkata - 700 094, WB, India
E-mail: [email protected]

Received Date: September 19, 2013; Accepted Date: September 30, 2013; Published Date: October 07, 2013

Citation: Ganguly S (2013) Microfloral Diversity in Fish: An Editorial. Fish Aquac J 4:e101. doi:10.4172/2150-3508.1000e101

Copyright: © 2013 Ganguly S. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Visit for more related articles at Fisheries and Aquaculture Journal


It is well-known that the digestive tract structure in different fish species is distinct. The differences are highly prominent in the various stages of fish development. Hence the digestive tract structure is the first factor that affects and influences the formation of gastrointestinal bacteria communities. The formation of the regular microflora is indeed a complex process that takes place in the digestive tract of fish larvae and fry and it depends on fish spawn (lay and deposit large quantities of eggs in water) food and the microflora of the surrounding water. Lot of investigation has been carried on in order to study the formation of the microflora in the digestive tract of carp from the larval stage to adult fish and it has been ascertained that the formation of bacterioflora in the digestive tract of fish is a gradual process. The most dominant genera residing in the digestive tract of fish are Aeromonas, Pseudomonas,Clostridium and Bacteroides.


Fish; Microflora; Digestive tract


Aeromonas hydrophila, Pseudomonas and Vibrio are the bacteria present on the skin of fishes. This bacterial population is generally influenced by the marine ecosystem. The bacterial population along with the slimy coating on the scales of the fish body provides an efficient barrier against the entry of virulent microorganisms through skin of fishes. Bacteria associated with the fish skin can be enumerated by acridine orange epifluorescence microscopy and by plate counts on several media.

Microflora present in fish respiratory system

The breathing process in fishes takes place through their gills. One of the most intriguing thing in fish is having a long bony cover for the gill which is used for pushing water. Some of the fishes make use of operculum for pumping water. Water flows into the mouth and across the gills while the fishes swim. Countercurrent flow is used by most of the freshwater fishes to increase the uptake of oxygen. Countercurrent flow takes place when deoxygenated blood moves through the gill in one direction whereas oxygenated water moves through the gill in the other direction. The concentration gradient is well maintained by this process which in turn increases the efficiency of the respiration process. So, the only types of microflora evidenced in fish respiratory system are symbionts which generally occur in their surrounding aquatic environment. Till date, no pathogenic microflora or microflora of aquatic interest regarding fish respiratory system have been reported. Microflora residing on skin has no role to play in nutrient digestion and metabolism in fish [1].

Microflora present in fish digestive tract

In the digestive tract of fish, bacteria belonging to the genus Bacteroides appear as late as on the 44th day after hatching. Subsequently they become prevalent in the intestine of adult fish. Some findings imply that bacteria of the genera Aeromonas, Pseudomonas and Flavobacterium-Cytophaga dominate in the bacteriocenoses of the digestive tract of the freshwater fish. Many scientists investigated the effect of feeding intensity and food on the qualitative and quantitative composition of intestinal bacteriocenoses of fish. The distribution of intestinal bacteriocenoses of fish is affected by farming conditions of fish, too. Aeromonas and Lactobacillus bacteria predominate in the intestinal bacteriocenoses of fish inhabiting natural water bodies, whereas Enterobacteriaceae that make up to 50% of all bacteria, are prevalent in the bacteriocenosis of fish which are raised in farms and are fed on artificial food. In-depth study has been done on the various aspects of the microflora of the digestive tract of fish but data about the impact of xenobiotics on the intestinal microflora of hydrobiont is limited. If bacteria non-typical of the living environment of hydrobionts are abundant in the water surrounding the latter, they make a negative influence on the immune system of fish by restraining it, thus impacting the animal’s general physiological state [1].


Select your language of interest to view the total content in your interested language
Post your comment

Share This Article

Relevant Topics

Article Usage

  • Total views: 12321
  • [From(publication date):
    December-2013 - Jan 17, 2019]
  • Breakdown by view type
  • HTML page views : 8393
  • PDF downloads : 3928

Post your comment

captcha   Reload  Can't read the image? click here to refresh

Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2019-20
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri and Aquaculture Journals

Dr. Krish

[email protected]

+1-702-714-7001Extn: 9040

Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals


[email protected]

1-702-714-7001Extn: 9042

Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001Extn: 9040

Clinical Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

Food & Nutrition Journals

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

General Science

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics & Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]

1-702-714-7001Extn: 9014

Materials Science Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Nursing & Health Care Journals

Stephanie Skinner

[email protected]

1-702-714-7001Extn: 9039

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

Ann Jose

ankara escort

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

pendik escort

[email protected]

1-702-714-7001Extn: 9042

© 2008- 2019 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version