Seiners use surrounding and seine nets. This is a large group ranging from open boats as small as 10 metres in length, to ocean going vessels. There are also specialised gears that can target demersal species.
A seiner fishing for salmon off the coast of Raspberry Island (Alaska) in July 2009.
Drawing of a purse seiner.gif
Drawing of a large purse seiner.gif
The Spanish tuna purse seiner, Albatun Dos, near Victoria, Seychelles
http://www.thefishfinder.com/members/saltwater/ledbetter/
* Purse seiners - are very effective at targeting aggregating pelagic species near the surface. The seiner circles the shoal with a deep curtain of netting, possibly using bow thrusters for better manoeuvrability. Then the bottom of the net is pursed (closed) underneath the fish shoal by hauling a wire running from the vessel through rings along the bottom of the net and then back to the vessel. The most important part of the fishing operation is searching for the fish shoals and assessing their size and direction of movement. Sophisticated electronics, such as echosounders, sonar, and track plotters, may be used are used to search for and track schools; assessing their size and movement and keeping in touch with the school while it is surrounded with the seine net. Crows nests may be built on the masts for further visual support. Large vessels can have observation towers and helicopter landing decks. Helicopters and spotter planes are used for detecting fish schools. The main types of purse seiners sre the the American seiners, the European seiners and the Drum seiners.
* American seiners - have their bridge and accommodation placed forward with the working deck aft. American seiners are most common on both coasts of North America and in other areas of Oceania. The net is stowed at the stern and is set over the stern. The power block is usually attached to a boom from a mast located behind the superstructure. American seiners use triplerollers A purse line winch is located amidships near the hauling station, near the side where the rings are taken onboard.
* European seiners - have their bridge and accommodation located more to the after part of the vessel with the working deck amidships. European seiners are most common in waters fished by European nations The net is stowed in a net bin at the stern, and is set over the stern from this position. The pursing winch is normally positioned at the forward part of the working deck
* Drum seiners - have the same layout as American seiners except a drum is mounted on the stern and used instead of the power block. They are mainly used in Canada and USA
* Tuna purse seiners - are large purse seiners, normally over 45 meters, equipped to handle large and heavy purse seines for tuna. They have the same general arrangement as the American seiner, with the bridge and accommodation placed forward. A crows nest or tuna tower is positioned at the top of the mast, outfitted with the control and manoeuvre devices. A very heavy boom which carries the power block is fitted at the mast. They often carry a helicopter to search for tuna schools. On the deck are three drum purse seine winches and a power block, with other specific winches to handle the heavy boom and net. They are usually equipped with a skiff.
* Seine netters - the basic types of seine netters are the Anchor seiners and Scottish seiner in northern Europe and the Asian seiners in Asia.
* Anchor seiners - have the wheelhouse and accommodation aft and the working deck amidships, thus resembling side trawlers. The seine net is stored and shot from the stern, and they may carry a power block. Anchor seiners have the coiler and winch mounted transversally amidships.
* Scottish seiners - are basically configured the same as anchor seiners. The only difference is that, whereas the anchor seiner has the coiler and winch mounted transversally amidships, the Scottish seiner has them mounted transversally in the forward part of the vessel.
* Asian seiners - In Asia the seine netter usually has the wheelhouse forward and the working deck aft, in the manner of a stern trawler. However, in regions where the fishing effort is a labour intensive, low technology approach, they are often undecked and may be powered by outboards motors, or even by sail.
A seiner fishing for salmon off the coast of Raspberry Island (Alaska) in July 2009.
Drawing of a purse seiner.gif
Drawing of a large purse seiner.gif
The Spanish tuna purse seiner, Albatun Dos, near Victoria, Seychelles
http://www.thefishfinder.com/members/saltwater/ledbetter/
* Purse seiners - are very effective at targeting aggregating pelagic species near the surface. The seiner circles the shoal with a deep curtain of netting, possibly using bow thrusters for better manoeuvrability. Then the bottom of the net is pursed (closed) underneath the fish shoal by hauling a wire running from the vessel through rings along the bottom of the net and then back to the vessel. The most important part of the fishing operation is searching for the fish shoals and assessing their size and direction of movement. Sophisticated electronics, such as echosounders, sonar, and track plotters, may be used are used to search for and track schools; assessing their size and movement and keeping in touch with the school while it is surrounded with the seine net. Crows nests may be built on the masts for further visual support. Large vessels can have observation towers and helicopter landing decks. Helicopters and spotter planes are used for detecting fish schools. The main types of purse seiners sre the the American seiners, the European seiners and the Drum seiners.
* American seiners - have their bridge and accommodation placed forward with the working deck aft. American seiners are most common on both coasts of North America and in other areas of Oceania. The net is stowed at the stern and is set over the stern. The power block is usually attached to a boom from a mast located behind the superstructure. American seiners use triplerollers A purse line winch is located amidships near the hauling station, near the side where the rings are taken onboard.
* European seiners - have their bridge and accommodation located more to the after part of the vessel with the working deck amidships. European seiners are most common in waters fished by European nations The net is stowed in a net bin at the stern, and is set over the stern from this position. The pursing winch is normally positioned at the forward part of the working deck
* Drum seiners - have the same layout as American seiners except a drum is mounted on the stern and used instead of the power block. They are mainly used in Canada and USA
* Tuna purse seiners - are large purse seiners, normally over 45 meters, equipped to handle large and heavy purse seines for tuna. They have the same general arrangement as the American seiner, with the bridge and accommodation placed forward. A crows nest or tuna tower is positioned at the top of the mast, outfitted with the control and manoeuvre devices. A very heavy boom which carries the power block is fitted at the mast. They often carry a helicopter to search for tuna schools. On the deck are three drum purse seine winches and a power block, with other specific winches to handle the heavy boom and net. They are usually equipped with a skiff.
* Seine netters - the basic types of seine netters are the Anchor seiners and Scottish seiner in northern Europe and the Asian seiners in Asia.
* Anchor seiners - have the wheelhouse and accommodation aft and the working deck amidships, thus resembling side trawlers. The seine net is stored and shot from the stern, and they may carry a power block. Anchor seiners have the coiler and winch mounted transversally amidships.
* Scottish seiners - are basically configured the same as anchor seiners. The only difference is that, whereas the anchor seiner has the coiler and winch mounted transversally amidships, the Scottish seiner has them mounted transversally in the forward part of the vessel.
* Asian seiners - In Asia the seine netter usually has the wheelhouse forward and the working deck aft, in the manner of a stern trawler. However, in regions where the fishing effort is a labour intensive, low technology approach, they are often undecked and may be powered by outboards motors, or even by sail.
