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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>Eric R. Fetherman</dc:contributor>
  <dc:contributor>Melinda R. Baerwald</dc:contributor>
  <dc:contributor>George J. Schisler</dc:contributor>
  <dc:creator>Dana L. Winkelman</dc:creator>
  <dc:date>2014</dc:date>
  <dc:description>&lt;p&gt;&lt;i&gt;Myxobolus cerebralis&lt;/i&gt;&lt;span&gt;&amp;nbsp;caused severe declines in rainbow trout populations across Colorado following its introduction in the 1980s. One promising approach for the recovery of Colorado&amp;rsquo;s rainbow trout populations has been the production of rainbow trout that are genetically resistant to the parasite. We introduced one of these resistant crosses, known as the GR&amp;times;CRR (cross between the German Rainbow [GR] and Colorado River Rainbow [CRR] trout strains), to the upper Colorado River. The abundance, survival, and growth of the stocked GR&amp;times;CRR population was examined to determine if GR&amp;times;CRRs had contributed offspring to the age-0 population, and determine whether these offspring displayed increased resistance and survival characteristics compared to their wild CRR counterparts. Apparent survival of the introduced GR&amp;times;CRR over the entire study period was estimated to be 0.007 (&amp;plusmn;0.001). Despite low survival of the GR&amp;times;CRRs, age-0 progeny of the GR&amp;times;CRR were encountered in years 2008 through 2011. Genetic assignments revealed a shift in the genetic composition of the rainbow trout fry population over time, with CRR fish comprising the entirety of the fry population in 2007, and GR-cross fish comprising nearly 80% of the fry population in 2011. A decrease in average infection severity (myxospores fish&lt;/span&gt;&lt;sup&gt;&lt;span&gt;&amp;minus;1&lt;/span&gt;&lt;/sup&gt;&lt;span&gt;) was observed concurrent with the shift in the genetic composition of the rainbow trout fry population, decreasing from an average of 47,708 (&amp;plusmn;8,950) myxospores fish&lt;/span&gt;&lt;sup&gt;&lt;span&gt;&amp;minus;1&lt;/span&gt;&lt;/sup&gt;&lt;span&gt;&amp;nbsp;in 2009 to 2,672 (&amp;plusmn;4,379) myxospores fish&lt;/span&gt;&lt;sup&gt;&lt;span&gt;&amp;minus;1&lt;/span&gt;&lt;/sup&gt;&lt;span&gt;&amp;nbsp;in 2011. Results from this experiment suggest that the GR&amp;times;CRR can survive and reproduce in rivers with a high prevalence of&amp;nbsp;&lt;/span&gt;&lt;i&gt;M. cerebralis&lt;/i&gt;&lt;span&gt;. In addition, reduced myxospore burdens in age-0 fish indicated that stocking this cross may ultimately lead to an overall reduction in infection prevalence and severity in the salmonid populations of the upper Colorado River.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1371/journal.pone.0096954</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>PLoS ONE</dc:publisher>
  <dc:title>Survival and reproduction of myxobolus cerebralis-resistant Rainbow Trout introduced to the colorado river and increased resistance of age-0 progeny</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>