Microbes and Environments
Online ISSN : 1347-4405
Print ISSN : 1342-6311
ISSN-L : 1342-6311
Regular Papers
Fish Farming Affects the Abundance and Diversity of the Mercury Resistance Gene merA in Marine Sediments
Leena K. PitkänenManu TamminenAnu HynninenAntti KarkmanJukka CoranderAarno KotilainenMarko Virta
Author information
Supplementary material

2011 Volume 26 Issue 3 Pages 205-211


Microbes in sediments below fish farming cages are exposed to a variety of compounds used in aquaculture, such as antifoulants, antimicrobials and mercury. Here, we assessed the abundance of the mercury resistance gene merA in the sediment of four fish farms and four pristine sites using quantitative PCR, and at three fish farms and two pristine sites by constructing clone libraries and sequencing merA amplicons. The abundance of merA was consistently greater at fish farm sites than at pristine sites, and the merA phylotypes were different between fish farm and pristine sites. Mercury concentrations were too low to cause selection pressure and did not differ significantly among samples. The primers designed specifically for this study were capable of detecting two new potential merA clades.

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© Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology
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