In 1996,
spring floods washed out a bridge and changed the course of a North Branch, Codroy River
tributary. Once all the necessary permits were obtained from DFO and the Department
of Environment (Water Resources Division), the bridge reconstruction began. Upon
completion of the bridge, the present stream had to be realigned to its original
channel. This was accomplished using an excavator to dredge the original channel
which was completely filled in with debris. Since the present stream bypassed the
original location, all this work was undertaken in the "dry", preventing any
siltation into the main river.
Following the stream realignment, hundreds of
juvenile salmonoids became isolated in small pockets along the dewatered section. Al
Pitcher, Area Habitat Co-ordinator with Federal Fisheries suggested that a joint effort
between Corner Brook Pulp and Paper, Department of Fisheries and Oceans and the Salmon
Preservation Association for the Waters of Newfoundland (SPAWN) be undertaken to capture
and relocate the fish.
An agreement was reached that myself, Al Pitcher and Keith
Piercey (SPAWN Vice- President) would run the project using SPAWN's electrofishing unit.
WHAT IS ELECTROFISHING?
Basically, electrofishing is a method wherein fish are
briefly stunned with an electric charge so they can be captured for study or
relocation. Once the fish are immobilized, they are scooped up with fine mesh nets
and placed in a pail of water to recover, before being studied or released.
Mortality can be very low providing it is done correctly. In our case we lost just
eight fish out of 552.
The stream was e-fished in 50 meter segments separated by
barrier nets to isolate each area. The downstream net was moved above the upstream
net as each segment was finished. This ensured we would capture as many fish as
possible.
Our final count was 356 juvenile salmon (including some
silvered smelts) and 196 trout - mostly juveniles. All were released back into the
main tributary to continue their existence.
At the end of the day we all felt the project was a
success. We left with a feeling of accomplishment and satisfaction knowing we had
done our small part to ensure the survival of the species. It was a welcomed change
to actually carry out a joint hands -on project between CBPP, DFO and a special interest
group like SPAWN, instead of discussing environmental issues across a table. I think
we all came out of the day with a greater understanding and appreciation of the work we
each perform. And who knows, in the future one of us may hook and battle one of
those 356 released salmon or one of their offspring!
Special thanks must go to Al Pitcher, who provided the
tailgate cuisine for the day. He kept us well fed with his specialty, Bologna Stew
by the barrel.
Barry Elkins
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