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Seine fishing (or seine-haul fishing; / s eɪ n / SAYN) is a method of fishing that employs a surrounding net, called a seine, that hangs vertically in the water with its bottom edge held down by weights and its top edge buoyed by floats. Seine nets can be deployed from the shore as a beach seine, or from a boat.
A purse seiner is a fishing vessel which uses a traditional method of catching tuna and other school fish species. A large net is set in a circle around a school of fish while on the surface. The net is then pursed, closing the bottom of the net, then pulling up the net until the fish are caught alongside the vessel.
Most commercial fishing boats are small, usually less than 30 metres (98 ft) but up to 100 metres (330 ft) for a large purse seiner or factory ship. Commercial fishing vessels can be classified by architecture, the type of fish they catch, the fishing method used, or geographical origin.
Seine fishing industries rapidly recognized the value of the power block, and by 1960, most northern seine vessels were using the power block. Nowadays power blocks come with dozens of configurations and sizes. They are installed on over twenty thousand fishing vessels across the major purse seining fisheries around the world. [5]
By the early 20th century, fishing vessels were built as steam boats with steam engines, or as schooners with auxiliary gasoline engines. By the 1930s the fleet was almost completely converted to diesel vessels. Fishing gear became more technical: Alaska purse seiners were in use by 1870, longliners were introduced in 1885; otter trawls were ...
The wooden hulled diesel-engine purse seiner fishing vessel Endeavor – completed in May 1940 at San Diego, Calif., was acquired by the U.S. Navy from Joe C. Mouise of San Diego under a bare-boat charter.
The purse seine is an example of a surrounding net. Here any salmon swimming near the surface are surrounded with a wall of netting, supported by floats. A surrounding net is a fishing net which surrounds fish and other aquatic animals on the sides and underneath. It is typically used by commercial fishers, and pulled along the surface of the ...
Both menhaden fisheries use a process known as purse seine fishing, in which two fishing boats surround a single school of fish with a large net. Purse seining is one of the most efficient methods of fishing available, with one of the lowest levels of bycatch . [ 19 ]