Fig. 2.

Average travel time (±1 SE) for individual populations from river mouth to the marine subarrays [Northern Strait of Georgia (NSOG), Howe Sound inner and outer lines, QCS, and JDF Strait] compared with minimum migration distance to the lines. Population estimates for each of the years 2004 to 2007 are separated by species (see Fig. 1 for locations). Lines show regression fits of travel time on distance, constrained to go through the origin, for coho (upper line) and sockeye and steelhead juveniles (lower lines); a regression line is not plotted for chinook because of sparse data, but point estimates are shown. The reciprocal of the slope represents speed, estimated at 5 km/d for coho and 14 km/d for sockeye and steelhead. More than one data point may be presented for a given population, representing different ocean lines encountered. Population estimates are not presented if only a single fish was detected.