Proportion (SE bars) of the brown trout and rainbow trout fry populations exhibiting signs of <i>M. cerebralis</i> infection.

<p>Fry were collected from the upper Colorado River in 2009 (brown trout: N = 277; rainbow trout: N = 29), 2010 (brown trout: N = 64; rainbow trout: N = 41), and 2011 (brown trout: N = 138; rainbow trout: N = 19).</p

The upper Colorado River study site.

<p>The 4.2-57 at the upstream end and Sheriff Creek at the downstream end. Locations in which fish were sampled in 2006 and 2007 (box), fry were sampled in all years of the study (triangles), and fish were stocked in 2006 (circles) and 2010 (squares) are shown.</p

Model-averaged monthly apparent survival rate (φ; SE bars) for the GR×CRR.

<p>Survival rates apply only to the GR×CRR fish that were stocked in the upper Colorado River in June 2006. Date ranges (x-axis) represent the periods between primary sampling occasions for the adult rainbow trout population.</p

Adult GR×CRR and CRR abundance (N km⁻¹; SE bars).

<p>Abundances were estimated within the upper Colorado River study section for the years 2008 to 2011.</p

The upper Colorado River study site.

<p>The 4.2-57 at the upstream end and Sheriff Creek at the downstream end. Locations in which fish were sampled in 2006 and 2007 (box), fry were sampled in all years of the study (triangles), and fish were stocked in 2006 (circles) and 2010 (squares) are shown.</p

Proportion of the wild rainbow trout fry population assigned as CRR, GR-cross, or unknown.

<p>Fry were collected from the upper Colorado River in 2007 (N = 16), 2008 (N = 21), 2009 (N = 79), 2010 (N = 57), and 2011 (N = 42). Assignments were made when the posterior probability was ≥0.80 using the microsatellite marker genetic differentiation test.</p

Predictive model of growth (TL; mm) trends of the GR×CRR stocked in the upper Colorado River in 2006.

<p>The von Bertalanffy growth function was determined using repeated measures of length from fish stocked in 2006 (1.6 years of age) and recaptured in 2008, 2009, 2010, or 2011.</p

Model selection results for factors influencing the probability that a fish exhibits signs of <i>M. cerebralis</i> infection in the upper Colorado River in the years 2009 through 2011.

1<p>Models are ranked by their AICc differences (Δ<i>_i</i>) relative to the best model in the set and Akaike weights (<i>w_i</i>) quantify the probability that a particular model is the best model in the set given the data and the model set.</p>‡<p><i>R</i>² values are maximum rescaled <i>R</i>² values.</p