Fig 1.
Map of the Discovery Islands region showing place names, rivers, salmon farms, current meter locations, the Sentry Shoal weather buoy, and the ocean circulation model boundary.
Fig 2.
Average fractional IHNV survival as a function of time from release: April (light blue) and July (purple) curves are due to both UV and natural biota, while biota 1 (red) and biota 2 (green) arise from only the natural biotic decay coefficients of 0.418 day-1 [11] and 2.30 day-1 (discussed in Summary).
Fig 3.
Average virus concentrations (log10 (pfu m-3)) over the top twenty meters of the water column on April 15, 2010 arising from releases of 1.6 × 1011 pfu/hour at five farms around Nodales Channel.
Black circles denote the release (diseased) farm (numbered as in Fig 1) while white circles show locations of the other four.
Fig 4.
As in Fig 3 but for July 15.
Fig 5.
Number of infective cohorts arriving at farm 17 from farm 16 (blue), along-channel model velocity (cm s-1) at 10 m depth at the location of mooring NC1 (red), and UV (A and B) radiation (W m-2, green), as in Fig 4.
The time period is 1300 GMT July 6 2010 to 1300 GMT July 13 2010.
Fig 6.
Percentage of hours when the viral concentrations arising from worst case (red) and vaccinated (blue) scenario disease outbreaks at (shedding) farms in April (upper line) and July (lower line) exceed minimum infective dose thresholds at nearby (receiving) unvaccinated farms.
See Fig 1 for farm locations. Shedding farms are along the y-axis and receiving farms along the x-axis. Blanks denote zero, decimal places are only shown for nonzero values less than 1, and diagonal (100%) values are shaded in light blue. Boxes with at least one value larger than 20%, 10% and 3% are shaded in orange, yellow, and pink, respectively.
Fig 7.
Average a) April and b) July mean surface elevations (cm) and flows (cm/s) at 10m depth in the Chancellor Channel region.
Numbered red dots denote farms, as in Fig 1 while the black bracketed numbers denote the number of days since the first IHNV outbreak was reported at farm 5 in August 2001. (These numbers were taken from Table 1 in [7].)
Fig 8.
Average a) April and b) July mean surface elevations (cm) and flows (cm/s) at 10m depth in the Nodales Channel region.
Numbered red dots denote farms, as in Fig 1, while the black bracketed numbers denote the number of days since the first IHNV outbreak was diagnosed at farm 5 in August 2001. (These numbers were taken from Table 1 in [7].)
Fig 9.
Homathko and Salmon River discharges (m3 s-1) for April-October 2010 with light shading denoting the months of April and July.
Note the different vertical scaling.
Fig 10.
2010 monthly average wind roses at the Sentry Shoal weather station (Fig 1).
Directional percent refers to the percentage of the time the wind was blowing toward the direction shown (±11.25°), while average speed (m s-1) refers to the average magnitude of the wind in each of those directions. Note the different axis scales for July and August.
Fig 11.
Average hourly UV radiation (A and B, W m-2) absorbed by the ocean for April and July 2010.
Table 1.
April and July monthly-averaged velocities (cm s-1, degrees counter-clockwise from east) over the top 20m (or portion thereof) at each of the ADCP locations (Fig 1).
Fig 12.
Monthly-averaged observed (red) and model blue) near surface currents for a) April and b) July, as listed and described in Table 1.