21
Pacic Ocean
Northern Strait of Georgia
Juan
de
Fuca
Strait
Derby
Mission
Fraser Mouth
Queen
Charlotte
Strait
Johnstone Strait
Discovery Islands
Northern Strait of Georgia
Juan
de
Fuca
Strait
Derby
Mission
Fraser Mouth
Queen
Charlotte
Strait
Johnstone Strait
Discovery Islands
VANCOUVER
ISLAND
Figure 11. Acoustic receivers (with yellow flotation collars)
deployed during SSMSP. Photo by Dennis Frost.
Figure 12. The high detection efficiency of the new arrays for the
small V4 tags allows fish as small as 10g to be tagged, opening up
the possibility of telemetry studies of Chinook and other smaller
salmonids. Photo by Erin Rechisky, Kintama Research.
These new arrays have dual receivers and can pick up
both 69KHz and 180KHz frequencies, which are emitted
by larger Vemco V7 tags (69 kHz) and new, smaller V4
(180 kHz) tags, respectively. The V4 tag is half the size of
the V7 and weighs only 0.24 gm in water. The smaller
tag is preferred for juvenile salmon and during SSMSP,
Kintama Research was able to establish the high detection
efficiency of the new arrays and the utility of the small V4
tags. The high detection efficiency of V4 tags opens up the
possibility of carrying out tagging studies on numerous
other salmonid stocks, and allows for tagging much smaller
fish (down to 9-10g) than has been previously possible.
PSF, in collaboration with Kintama Research and UBC
(Dr. Scott Hinch and students) as well as others, used
acoustic telemetry to address a number of key questions,
and to assess the behavior (migration rates and patterns)
and survival of individual juvenile salmon in the Strait of
Georgia, the Discovery Islands and Johnstone Strait
(studying Sockeye, steelhead, and yearling Chinook
Salmon).
Figure 10. The red coloured arrays were those arrays implemented by KIntama Research and are additional to the arrays managed by
the Ocean Tracking Network (OTN), which are coloured yellow.
100 mm, 10 gram smolt
