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Selection in the host structures the microbiota associated with developing cod larvae (Gadus morhua).

Ingrid Bakke^1,2, Eivind Coward³, Tom Andersen⁴

¹Department of Biotechnology, Faculty of Natural Sciences and Technology, NTNU Norwegian University of Science and Technology, Sem Saelands v. 6/8, N-7491, Trondheim, Norway.

Environmental Microbiology

|April 30, 2015

Summary

This summary is machine-generated.

The marine fish larval microbiota is distinct from its environment and changes significantly with age. Host selection, driven by gut development, shapes these bacterial communities.

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Area of Science:

Marine biology
Microbiology
Genomics

Background:

Marine fish larvae host diverse bacterial communities.
Larval microbiota may be influenced by unique environmental factors compared to terrestrial animals.

Purpose of the Study:

To analyze the beta-diversity of cod larval microbiota.
To compare larval microbiota with water and live feed bacterial communities.
To understand the factors structuring marine fish larval microbiota.

Main Methods:

Pyrosequencing of bar coded v4 16S rDNA amplicons.
Analysis of beta-diversity in microbial communities.
Comparison of larval, water, and live feed microbiota.

Main Results:

Cod larval microbiota composition changed significantly with age.
Larval microbiota was distinct from water and live feed, especially early on.
Microbiota similarity to water increased with larval age.

Conclusions:

Host selection strongly structures the cod larval microbiota.
Changes in microbiota are linked to the development of the larval intestinal system.
Non-stochastic processes influence microbial community structure in marine larvae.