Demersal species European hake Target Species
|The boat seines consists basically of a conical netting body, two relatively long wings and a bag ahead of the wings, are long ropes which are used to encircle a large bottom area with the purpose of herding (catching) fish form that area.|
|These vessels use surrounding and seine nets and comprise a large group appearing in all sizes.
Pair seiningDrawing of Pair seining
|Species EnvironmentTarget species can be either scattered or grouped, close to the bottom.Fishing GearThe boat seines consists basically of a conical netting body, two relatively long wings and a bag. An important component for the capture efficiency of boat seines is the long ropes extending from the wings, which are used to encircle a large area. Many seine nets are very similar in design to Trawl nets. Frequently, however, the wings are longer than on trawls. The catching power of pair seining is due to the fact that a very large area of seabed is swept in a single tow (much more than the ground swept with a Bottom trawls, i.e. two small seiners, will sweep (in fishing operations lasting about one hour) more than three times the area exploited by a trawler in three hours. Pair seining is among the most effective technique for small vessels to catch demersal fish on smooth grounds.Vessel OverviewThe vessels used for pair seining are rather small traditional boats already used for other fishing technics, e.g. typical of the 10-14 meters Canadian lobster or scallop boats with around 100-150 HP engine. The boats used for pair seining must preferably have the wheelhouse forward and free space on the aft where a mast and boom or derrick can be installed just behind the wheelhouse. The vessels are normally fitted with a large drum having large flanges (e.g. 75 cm). Such a drum enable to hold 400 fathoms of 10 mm diameter wire and 240 fathoms of 60 mm circumference manila rope.Fishery Production SystemsEspecially small scale fishery.Fishing EnvironmentMarine coastal and off-shore waters on smooth grounds.Fishing OperationsAs in other pair fishing technique, the "pair" consists in a "main vessel" and a "partner one" fishing together. Each boat is equipped with a complete set of gear but one of the skippers is generally in command of the operations. Once the boats have arrived at the grounds, the net is paid out over the stern of the shooting vessel or main vessel. It is worth observing that the shooting is done codend first as on a trawler, and not wing first as on a Seine netters. The second boat (partner vessel) passes its manila warp end across and this is shackled on to the bridle. The shooting of the bridles and warps begin. The bridles poles then go over the stern, and while gripping softly on the winch brakes, the boats spread apart in opposite directions at right angles to the direction of the tow. When the net wings are spread apart, the manila warps are released and paid out until the wire is reached. In shallow water or with very limited engine power, only about 120 fathoms of manila rope is set, but normally the double is set by each boat. The boats turn and head in the towing direction and begin paying out the wires. It is important that the vessel has turned before the wire is released. The boats tow ahead at 1-2 knots during about one hour. The wires on each side dig into the sand and keep the gear open. Once the wires are parallel, hauling commences with the propellers still driving ahead, but slowly now. Hauling can continue and be completed while the vessels are one or two boats-lengths apart. Once the bridle poles are up, the second vessel passes its bridle to the hauling boat (main vessel) for him to complete the hauling of the seine. If the catch is good, both vessels steam back up-tide and repeat the operation.Fishery Area
Canada, off East coast (Newfoundland, Nova Scotia and Quebec) and West coast.Source of information|
Thomson, D. 1978 “Pair trawling and pair seining; the technology of two-boat fishing.” Fishing New Books. 0-85238-087-9