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Seasonal dynamics of microbial community in an aquaculture system for Nile tilapia ( Oreochromis niloticus )
Author(s) -
Resende Juliana Alves,
Silva Vânia Lúcia,
Cesar Dionéia Evangelista,
Del'Duca Alessandro,
Fontes Cláudia Oliveira,
Diniz Cláudio Galuppo
Publication year - 2015
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.12281
Subject(s) - biology , oreochromis , aquaculture , nile tilapia , cytophaga , fish farming , bacteria , proteobacteria , ecology , microbial population biology , tilapia , pseudomonas , fishery , flavobacterium , fish <actinopterygii> , genetics , 16s ribosomal rna
Studies on bacterial abundance and diversity will improve the understanding of the microbial ecology to optimize aquaculture production, water quality, disease control and environmental impact of effluents. We comparatively evaluated an aquaculture system in dry and rainy seasons by Fluorescent in situ Hybridization (FISH) and culture‐dependent methodology. Overall, a negative correlation between seasonality in bacterial and flagellates abundance was observed. Alpha‐, beta‐, gamma‐proteobacteria and Cytophaga‐Flavobacter were observed with seasonal variation. Putative pathogenic bacteria such as coagulase‐negative Staphylococcus , non‐fermenter Gram‐negative rods ( Pseudomonas sp. and Burkholderia sp.), and Enterobacteriaceae were also detected in this study with significant seasonal variation. Focusing on medically important bacteria, our data show that microbial diversity in the environment associated with aquaculture, as it is practiced, may be altered in growth ponds used for fish cultivation. As an ecological consequence, potentially pathogenic bacteria might be released in high concentrations to the downstream environments posing potential threats to human and animal health.