Thursday, January 3, 2008
Fish Tales
What is Purse Seining??
Purse seiners catch salmon (primarily pink salmon) by encircling them with a long net and drawing (pursing) the bottom closed to capture the fish.
The net is first stacked on the stern of the boat and then payed into the water while the boat travels in a large circle around the fish.
The far end of the net is attached to a “power skiff,” which helps the operation by holding the net while the seiner completes the circle. The top of the net stays on the surface of the water because of its “float line” that runs through thousands of colorful floats, and the bottom of the net falls vertically because of its weighted “lead line.”
As a result, the net hangs like a curtain around the school of fish. The vessel crew then purses its bottom with a “purse line.” The lines, and thus the net, are retrieved through a hydraulic power block (winch). Once most of the net has been retrieved, with the remainder of it lying in a “bag” alongside the vessel, the fish are dipped from the bag and into the vessel’s hold.