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| Bringing
in salmon on the Willapa R. |
Fish
Handling
In our tests of selective
fishing gear, we have learned a few techniques to reduce injury/stress
and improve survival of salmon caught in nets:
- Keep the soak
time of each set to approximately 20 minutes (from time net is put into
the water until time the net is taken out of the water).
- Look ahead while
pulling in the net. As caught salmon approach the boat, manually pull
in the net and lift the fish over the net rollers to bring them on board.
- When a salmon is
barely caught in a net, use a knotless dip net to retrieve the fish
while it's still in the water to prevent it from escaping.
- Lift caught fish
over the bow's rollers to prevent them from being injured when bringing
in the net.
- To revive fish
that are not visibly respiring, place the fish in the recovery box as
quickly as possible,
grasp the fish by the caudal fin, and gently move it in a backward/forward
motion in the recovery box filled with water that is rapidly being pumped
into the box. Continue for a minute or so, then place the fish's mouth
directly on the water being pumped into the box. Keep it there until
the fish revives.
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| Chinook
caught in tangle net. |
- Don't give up! Non-respiring
fish may take up to an hour to revive from being caught in the net.
- To create a "fish
friendly" environment, recovery boxes should be dark in color-
either use dark materials or paint the box black, dark brown, dark blue,
or dark green. Minimize the amount of light shining directly on a fish
in the recovery box.
- Handle the fish carefully.
Whenever possible, do not allow the fish to fall on the boat deck (to
prevent injury to the fish). Use two hands to carry the fish from one
place to the next: place one hand to grip the fish's tail, the other
underneath and cradling the fish's belly. Never carry a fish by its
tail! (doing so can separate the fish's vertebrae). Absolutely avoid
touching the fish's gills- these are easily injured and are critical
for survival. Fish should be slipped carefully into the recovery box,
not thrown!
- Upon release of salmon
back to the river, if your recovery box is not equipped with a sluice
gate, use two hands to carefully release it overboard (make sure the
fish clears the side of the boat). Aim the fish in a direction away
from the net to minimize the likelihood that the fish will be recaptured.
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