Dataset Detail
Dataset: Distribution of Tubifex tubifex lineages in the Willamette River Basin (OR)
| Project: Resolving Uncertainties in Myxobolus cerebralis Introduction and Establishment Risks
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| Dataset Abstract: A qualitative survey for T. tubifex was conducted in the Willamette River Basin (OR) with subsequent characterization of specimens to determine mitochondrial lineage and susceptibility. The spreadsheet has seven tabs: the first contains summary data, the second provides metadata for tabs 3-7, and the third is a summary of the raw data (All Willamette) from sheets 4-7. | |
| Significance of Results: All five T. tubifex lineages reported from North America were found in the Willamette River Basin, including lineage IV, which had previously been described only from Europe and Alaska. | |
| Relevance to Managers: Lineage III of T. tubifex is the most susceptible to M. cerebralis, and its detection in the Willamette River Basin is cause for concern. This lineage comprised approximately 12-56% of worm populations, with the greatest numbers in the North Santiam River and fewest in the mainstem of the Willamette River. The presence of resistant lineages IV, V, and VI T. tubifex could have significant beneficial implications for WRB salmonids in areas where these lineages dominate Tubifex populations. Together, these lineages comprised approximately 88% of the T. tubifex population in the mainstem Willamette River and 24-54% in river tributaries. | |
| Utility to Researchers: Western streams appear to have highly variable populations of Tubifex tubifex. It would be useful to compare lineage composition with other regions. | |
| Questions Generated: Is there a reason that some lineages were encountered more frequently in the mainstem river and others in tributaries? | |
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