Project description:In this study, adult male rainbow darter (Etheostoma caeruleum) were collected from nine sites located at different distances from two wastewater treatment plants (WWTPs) in the Grand River, Ontario, Canada. The goal of this project was to see if the liver transcriptome of fish residing downstream of the two WWTPs differs from the non-exposed fish. Further, this research was also addressing the affects of differnent reference site selection on gene expression patterns, and their subsequent interpretation.The RNA from male rainbow darter was exctracted from liver tissue and used for further gene expression analysis.
Project description:Rainbow darter (Etheostoma caeruleum) are a small benthic fish found in North America. This species is sensitive to sewage effluent in the environment, showing the presence of intersex in up to 80% of males in near-field areas in the Grand River, ON. To learn more about the molecular events associated with intersex, we developed a customized oligonucleotide microarray (4x180K) with next generation sequencing (454 Roche) to characterize molecular responses in the gonad. Transcriptomics was performed on both males and females from both a reference site and a polluted site. Males with and without intersex from the polluted site were compared to the control males.
2014-05-22 | GSE57394 | GEO
Project description:High-density RADseq-based linkage map for Etheostoma caeruleum
Project description:We have been studying intersex in male rainbow darter (Etheostoma caeruleum) associated with exposure to sewage effluents. To understand changes in the gene transcriptome associated with intersex it was necessary to have a better understanding of normal annual changes in the transcriptome. The goal of this research is to identify patterns of gene expression associated with the different stages of gonad development during the annual cycle. The studies of molecular pathways involve in ovarian or testis development has been poorly studied. While most studies focus on female ovarian changes, there is a gap in understanding testis development. A customized second generation microarray for rainbow darter (8x15k) was used to identify patterns of gene expression -in terms of mRNA abundance- in male rainbow darter gonads during an annual cycle.
