59
0.00
0.25
0.50
0.75
1.00
Discovery Sutil Desolation
SURVIVAL
PER
100
km
0.00
0.25
0.50
0.75
1.00
Discovery Sutil Desolation
DETECTION
EFFICIENCY
Figure 10. Modelled Sockeye smolt survival rate per 100 km and
detection efficiency expressed for three primary migration routes
through the Discovery Islands. Figure provided by Steve Johnston.
Figure 5. Survivorship patterns
for Chilko Sockeye studied 2010-
2014 using a variety of different
acoustic tags. Figure provided by
Scott Hinch.
Figure 8. Route specific survival of Seymour steelhead: Discovery
Passage: 97.7%, Sutil Channel: 46.2%. Figures 8 and 9 provided by
Steve Johnston.
Route through
Discovery
Islands
2016
27 - V4
tagged
smolts
2017
108 - V4/V7
tagged
smolts
2018
117 - V5/V7
tagged
smolts
Discovery
Passage
10 32 27
Sutil
Channel
9 49 81
Desolation
Sound
1 15 9
Figure 9. Migration pathways of Chilko Sockeye through the
Discovery Islands 2016-2018.
Two Year Old
V7
Figure 6. Relative sizes of age-1 and age-2 Chilko sockeye smolts,
and the different acoustic tags used for study. Figure provided by
Christine Stevenson.
One Year Old
V4
Figure 7. Relative survival patterns of age-1 (blue) and age-2 (red)
Chilko Sockeye smolts. Light grey lines and symbols show survival
of age 2 tagged fish from previous years (see Figure 5). Figure
provided by Christine Stevenson.
