Studies on the structure and function of intestinal microbes of surgeonfishes in the central Red Sea with a focus on the giant bacteria Epulopiscium spp.
Type
DissertationAuthors
Miyake, Sou
Advisors
Stingl, Ulrich
Committee members
Berumen, Michael L.
Pain, Arnab

Klebensberger, Janosch
Program
Marine ScienceKAUST Department
Biological and Environmental Science and Engineering (BESE) DivisionDate
2015-05Embargo End Date
2017-05-21Permanent link to this record
http://hdl.handle.net/10754/552840
Metadata
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At the time of archiving, the student author of this dissertation opted to temporarily restrict access to it. The full text of this dissertation became available to the public after the expiration of the embargo on 2017-05-21.Abstract
The intestinal tract microbiota – microbial community of the gut – is an important field in microbiology not only because of its critical role in the host development, but also increasingly large number of diseases are associated with certain state of the gut microbiota. The community structure and function of the gut microbiota is relatively well studied in humans and related higher vertebrates, but is severely understudied in fish. This is especially true for the coral reef fishes, who constitute the most diverse assemblage of vertebrates spread over a very local scale, and are essential for the resilience of the reefs. In order to bridge this gap in knowledge, this dissertation studied the community structure, interactions and functions of the gut microbial community from the surgeonfishes in the Red Sea – with special focus on the surgeonfish enteric symbiont Epulopiscium spp. Initially, I studied the composition of the gut microbiota of nine surgeonfish and three nonsurgeonfish species from the Red Sea using 454 pyrosequencing. Upon discovering the high abundance of Epulopiscium spp. in herbivorous surgeonfishes, I then proceeded to identify their phylogenetic diversity, distribution, as well as deducing their coevolutionary relationship with the host. Because Epulopiscium spp. undergo substantial changes in the cell size (grow up to ~600μm) and the DNA concentration (from 85 to over 250pg per cell) throughout their diel lifecycle, I also studied the temporal changes in their expression pattern using RNA-seq. Overall, this dissertation shed light on the complex structure, interaction and function of an important family of coral reef fish from the Red Sea through range of molecular techniques.Citation
Miyake, S. (2015). Studies on the structure and function of intestinal microbes of surgeonfishes in the central Red Sea with a focus on the giant bacteria Epulopiscium spp. KAUST Research Repository. https://doi.org/10.25781/KAUST-XEXZ8ae974a485f413a2113503eed53cd6c53
10.25781/KAUST-XEXZ8