Gillnet
Gillnets are set in a line across the path of the salmon. The salmon swims
partially through the large diameter mesh, then catches its gill covers as
it tries to back out. On average 23% of all commercially harvested salmon
are gillnet caught.
Purse Seine
A purse seine is a net which is set in the water and then pulled into a
circle, as it surrounds the salmon. The bottom of the net is closed (pursed)
and drawn towards the fishing vessel where the salmon are landed aboard the
seine boat. Approximately 50% of all salmon commercially harvested are
caught by means of purse seining.
Troll
Troll-produced salmon are caught using hooks and lines. The troll boat draws
lures through the water at varying depths and the salmon strike the lures
and are hooked. Troll-produced salmon are dressed (eviscerated) at sea and
can be either iced aboard or quick frozen. Approximately 27% of the total
salmon harvest is by the troll method.