- Woman with a square hand lift net in the Mekong River Thailand
- A balance, a baited lift net for catching shrimp in France
Lift nets, also called lever nets, are a method of fishing using nets that are submerged to a certain depth and then lifted out of the water vertically. The nets can be flat or shaped like a bag, a rectangle, a pyramid, or a cone. Lift nets can be hand-operated, boat-operated, or shore-operated. They typically use bait or a light-source as a fish-attractor. [1] Lift nets are also sometimes called "dip nets", though that term applies more accurately to hand nets. [2]
Lift nets are hauled out by hand or mechanically through boom(s) and blocks. The handling (setting and hauling) of large lift nets, normally requires in addition one or several winches. The operations from the shore, from a canoe or a bigger boat includes the setting of the net at a certain depth opening facing upwards- the attraction of the fish over the above mentioned opening by light or bait, then the lifting and hauling of the net out of the water manually or mechanically.
The target species are small pelagic species, fish and squid.
Water Area Overview: All over the world.
These net are active a few meters below the surface. The active gear depends on the attraction power of light when light attraction is used. This differs when lamps are above the surface either one or several, or if under water lamps are used; with the former.
There are 3 main types of lift nets which can be distinguished as; portable hand lift nets (used in general, with light attraction), shore operated stationary lift nets and boat operated lift nets.[ citation needed ]
Portable hand lift nets are small lift nets operated manually (that is, the use of the hand). They usually have a rigid frame which is attached to a long pole. They are used primarily to catch fish and crustaceans, and may be submerged just below the water surface or close to the bottom. A person using hand lift nets usually operate it from the shore, on bridges, and sea coast from harbor walls. [3] The net consists of a horizontal netting panel or a bag shaped (used with the opening facing upwards).[ citation needed ]
They are dipped into and lifting from the water by means of a long pole if the hand lift nets are larger. No fishing vessel is required. After being submerged and kept a while at a certain depth (within a few meters), with the use of hand, the net is lifted and hauled out of water. The species mainly captured are the pelagic species and this takes place in water areas all over the world.[ citation needed ]
Portable hand lift nets do not or hardly have any negative environmental impact since the overall expected catch is always very little and when a few very small or juvenile fishes are caught they can be easily released alive.[ citation needed ]
Stationary lift nets are larger than hand lift nets and are attached permanently to a shore-built structure. Lifting the nets may be done by hand through the use of counterweights, or they may use mechanized winches. Bait or a strong source of light is placed in the middle of the net. They are typically placed near beaches or riverbanks. [4]
Stationary lift nets are relatively large and are usually operated from stationary installation situated along the shore. They are operated usually from the bank of a river or a suitable beach by installing them on a special platform. The more modern lift nets, are operated with the help of hand or motor driven winches. No fishing vessel is required. After being submerged at the required depth, the nets are lifted or hauled out of the water by the hand or mechanically. The fish are sometimes attracted by strong light or bait.[ citation needed ]
Stationary lift nets are mostly used to capture pelagic species and in this case boats are not often required. They are operated mainly at the water's surface either in the sea or inland waters.[ citation needed ]
Boat-operated lift nets are lift nets operated from water vessels. They may be lifted up by hand or by mechanical winches. They usually utilize several long poles attached to one side of the boat or surrounding the boat. Bait or a strong source of light is used to attract the fish. [5]
The two types of gear are the bag net ("basnig") and the blanket net. Depending on the target species, the catch process is supported by lights or bait. Most of the target species are small pelagic species and so takes place in water areas all over the world. The net is operated from the surface in the upper column, at sea or on inland water. Sometimes a large vessel known as a lift netter is used. Boat operated lift nets are often used in small scale fisheries from small catamarans (inland fisheries in Africa) or two canoes operating together.[ citation needed ]
Impacts: The by-catch rates are low in general. But when lights are used, more species are attracted than intended, for example: cephalopods.[ citation needed ]
Fishing is the activity of trying to catch fish. Fish are often caught as wildlife from the natural environment, but may also be caught from stocked bodies of water such as ponds, canals, park wetlands and reservoirs. Fishing techniques include hand-gathering, spearing, netting, angling, shooting and trapping, as well as more destructive and often illegal techniques such as electrocution, blasting and poisoning.
Trolling is a method of fishing where one or more fishing lines, baited with lures or bait fish, are drawn through the water at a consistent, low speed. This may be behind a moving boat, or by slowly winding the line in when fishing from a static position, or even sweeping the line from side-to-side, e.g. when fishing from a jetty. Trolling is used to catch pelagic fish such as salmon, mackerel and kingfish.
Angling is a fishing technique that uses a fish hook attached to a fishing line to tether individual fish in the mouth. The fishing line is usually manipulated via a fishing rod, although rodless techniques such as handlining also exist. Modern angling rods are usually fitted with a fishing reel that functions as a cranking device for storing, retrieving and releasing out the line, although Tenkara fishing and traditional cane pole fishing are two rod-angling methods that do not use any reel. The fish hook itself can be additionally weighted with a denser tackle called a sinker, and is typically dressed with an appetizing bait to attract and entice the fish into swallowing the hook, but sometimes an inedible fake/imitation bait with multiple attached hooks is used instead of a single hook with edible bait. Some type of bite indicator, such as a float, a bell or a quiver tip, is often used to relay underwater status of the hook to the surface and alert the angler of a fish's presence.
Trawling is an industrial method of fishing that involves pulling a fishing net, that is heavily weighted to keep it on the seafloor, through the water behind one or more boats. The net used for trawling is called a trawl. This principle requires netting bags which are towed through water to catch different species of fishes or sometimes targeted species. Trawls are often called towed gear or dragged gear.
A fishing trawler is a commercial fishing vessel designed to operate fishing trawls. Trawling is a method of fishing that involves actively dragging or pulling a trawl through the water behind one or more trawlers. Trawls are fishing nets that are pulled along the bottom of the sea or in midwater at a specified depth. A trawler may also operate two or more trawl nets simultaneously.
Gillnetting is a fishing method that uses gillnets: vertical panels of netting that hang from a line with regularly spaced floaters that hold the line on the surface of the water. The floats are sometimes called "corks" and the line with corks is generally referred to as a "cork line." The line along the bottom of the panels is generally weighted. Traditionally this line has been weighted with lead and may be referred to as "lead line." A gillnet is normally set in a straight line. Gillnets can be characterized by mesh size, as well as colour and type of filament from which they are made. Fish may be caught by gillnets in three ways:
Commercial fishing is the activity of catching fish and other seafood for commercial profit, mostly from wild fisheries. It provides a large quantity of food to many countries around the world, but those who practice it as an industry must often pursue fish far into the ocean under adverse conditions. Large-scale commercial fishing is called industrial fishing.
Seine fishing 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.
Artisanal fishing consists of various small-scale, low-technology, low-capital, fishing practices undertaken by individual fisherman. Many of these households are of coastal or island ethnic groups. These households make short fishing trips close to the shore. Their produce is usually not processed and is mainly for local consumption. Artisan fishing uses traditional fishing techniques such as rod and tackle, fishing arrows and harpoons, cast nets, and small traditional fishing boats. For that reason, socio-economic status of artisanal fishing community has become an interest of the authorities in recent years.
The Scottish east coast fishery has been in existence for more than a thousand years, spanning the Viking Age right up to the present day.
A fishing vessel is a boat or ship used to catch fish and other valuable nektonic aquatic animals in the sea, lake or river. Humans have used different kinds of surface vessels in commercial, artisanal and recreational fishing.
A factory ship, also known as a fish processing vessel, is a large ocean-going vessel with extensive on-board facilities for processing and freezing caught fish or whales. Modern factory ships are automated and enlarged versions of the earlier whalers, and their use for fishing has grown dramatically. Some factory ships are equipped to serve as a mother ship.
Fishing techniques are methods for catching fish. The term may also be applied to methods for catching other aquatic animals such as molluscs and edible marine invertebrates.
There are two major sources of fish in Uganda; one is from aquaculture, the other from fishing in rivers and lakes. The latter has made up the largest and most significant share of all fishing. Open water covers 15.3 percent of Uganda's surface and comprises five major lakes which are the main sources of fish in the country. Lake Victoria continues to be the most important water body in Uganda both in size and contribution to the total fish catch, followed by Lake Albert and Lake Kyoga.
This is a glossary of terms used in fisheries, fisheries management and fisheries science.
The Puretic power block is a special kind of mechanised winch used to haul nets on fishing vessels. The power block is a large pulley of aluminium with a hard rubber-coated sheave. While many men were needed for the back-breaking work of hauling a purse seine manually, the same work could be done by fewer men with a power block.
The fishing industry plays a significant part in the national economy of Pakistan. With a coastline of about 1,120 km, Pakistan has enough fishery resources that remain to be developed. Most of the population of the coastal areas of Sindh and Balochistan depends on fisheries for livelihood. It is also a major source of export earning.
A lampara net is a type of fishing net. It is a surrounding net having the shape of a spoon or a dustpan with a short leadline under a longer floatline. The net has a central bunt to contain the fish and two lateral wings.
Fishing gear and methods used in Uganda are both modern and traditional. Fish in Uganda are caught mostly with plank canoes and to a lesser extent, fiberglass boats. Some dugout canoes are also still being used. The plank canoes are generally 4–12 m (13.12–39.37 ft) in length and dugout canoes average 3.5 m (11.48 ft). The total number of vessels is about 17,000 and about 20% of these are motorized. Artisanal fishermen use various gear including gillnets, seines and hook and line. In a number of localities, traditional methods including baskets, traps and mosquito nets continue to be used. The gear commonly used includes gillnets, lift nets, scoop-nets used in light fishing; hook and line gear and fish traps.
Salambáw, is a type of lift net used by indigenous fishermen in the Philippines. They are found throughout the Philippine islands but are most prevalent in large lakes like Laguna de Bay, and sheltered coastal areas like Manila Bay, Ragay Gulf, and Batan Bay. Variations of salambáw lift nets include the bintol, panak, tangkal, and the basnig. Salambáw rafts were also known as saraboa or salakab.
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