Bait trap

The bait trap is similar to a regular trap but is square in shape. The bait trap is used mainly by fishermen around Australia and New Zealand to catch crayfish and crabs. Bait trap fishermen bait several traps and place them in a line. The traps are baited and launched equipped with a characteristic buoy so that the angler can recognize to whom it belongs. Funnel entrance diameter must not exceed 5cm. The height of the trap must be no more than 25cm. The trap must also be within the confines of 25cm wide and 50cm long. Bait traps mainly capture crabs and crustaceans.

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Beam trawling

BeamTrawl fishing method is practiced worldwide. The principle is as simple as it is effective. On both sides of a boat with an outstanding boom dragnets are attached; each has a steel pipe (beam) holding the nets open. On the tube on either side are two “shoes” or “skids” to ensure the nets are drawn across the seabed. The ticklers attached to the beam startle the ground fish upwards so that they end up in the net (the trawl). This fishing technique does contact the seabed and some argue that the entire boom causes a total catastrophe, but this is a fable. The fact is that almost all trawling techniques affect the seabed to varying degrees. The concern is that the beam, the slippers, the tickler and the net make contact with the seabed. Hence one attaches to the net pieces of nylon to decrease wear. The disadvantage is the amount of by catch, but without this technique catching flatfish, such as sole, is severely hampered. The Beam trawl method is mostly used to capture flatfish such as sole, brill, turbot, plaice and flounder. This method is certainly effective, but also has disadvantages such as high oil consumption.

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Bottom culture

Nowadays, mussels and oysters and many other types of shellfish are mostly cultivated. There is a distinction between Bottom culture and Rope culture. Before one can cultivate mussels, oysters or other shellfish species one must gather the seeds that are to be sown. The seed is placed in plots in the seabed, a method known as bottom cultivation. Once the clam matures and is edible it is harvested using a dredge. A mussel boat can set out four mussel dredges. A mussel dredge resembles the square dip net used for a fishbowl, but is somewhat larger and heavier. A mussel dredge is almost 2 meters wide and it scoops the mussels out of the soil. Oysters and other shellfish species are caught by applying the same technique.

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Bow fishing

Bow fishing is nowadays more of an outdoor sport with modern weaponry. In some of the more disadvantaged countries one still employs this fishing technique. Bow fishing is nothing but shooting prey with a bow and arrow. It seems to be a sustainable way of fishing, but be aware that the fish is not always shot into the head. Often one finds the fish in the body so the fish can have a lot of stress.

You can imagine that an active angler would lose many arrows when he missed his prey using this method. Hence at a later stage, a line was attached to allow the arrow to be retrieved along with the fish that was shot. Later this technique was highly modernized and the harpoon was launched.

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Cast net

Cast nets are still being used today. Although this technique dates back to ancient times, it is mainly small local fishermen who now use it to catch fish as well as high-quality shrimp. Once the net has been cast over a spot one pulls on the bottom line and the net closes, trapping the catch inside. Contemporary cast nets have a radius which ranges from 4 to 12 feet (1.2 to 3.6 meters)

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Cyanide

Fishing with cyanide still takes place in Indonesia and the Philippines and other underdeveloped parts of the world, and poses a serious threat to the nature under water. Driven mostly by poverty, youths dive into the water and look between holes and crevices in the coral for fish that are hiding there. Armed with a bottle of cyanide poison they inject it into the crevices in order to stun the fish. The poison has a crippling effect on the fish allowing the diver to easily remove it from the water. The dose is crucial; too much can cost the fish its life, and can also be harmful for the diver. The use of cyanide poisons the corals. The fish that survive the effects of this toxic substance are sold for a lot of money to dealers and restaurant owners. Anyone who has seen deformed fish in aquariums in Asia can even assume that this is due to excess intake of cyanide.

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Diving

Fragile and expensive types of fish and seafood are often harvested manually. The advantage of this method is that it is highly selective and does not cause soil damage. This process is very labor intensive, however, and not without dangers. Divers are often exposed to strong currents with all their consequences. Shellfish that are collected manually excel in beauty and are of high quality.

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Dreggen

Dreggen is een methode van het vangen van schaal en schelpdieren van de zeebodem. De Kor is een stalen frame waarover een net is bevestigd. Op de voorkant van de kor zijn vaak voorzien van stalen punten die fungeren als een soort hark. De Kor wordt gebruikt voor het bevissen van mosselen, oesters, sint-jakobsschelpen en andere schelpdieren. Een meer geavanceerde methode is de hydraulische trawl techniek.

 

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Explosive

The use of explosives is illegal. Unfortunately, this technique is still in use. Those who think that this only happens in underdeveloped parts of the world are just wrong. The operation is simple and profitable at the same time. Dynamite is a commonly used product but creative crooks also use other means and even fill cans and bottles with a potent cocktail. The explosive will be detonated in the water and after the enormous pressure of the explosion the fish will float to the surface. The result is a massacre that affects not only the fish but also other underwater creatures. There is evidence that large areas of coral reefs have in this manner been destroyed forever.

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Fish farming on land

Raising fish in ponds on land is less risky than raising them at sea. Raising fish in closed systems is favorable and in some cases can be called sustainable. As the fry grow they are moved to increasingly larger basins to allow the fish to continue growing.

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Fly fishing

Fly fishing is a technique that requires some experience. Fly fishing is difficult. Releasing the line combined with a whipping motion makes the sport attractive to many anglers. Fly fishing is mainly used to catch salmon and trout. This technique is used in many places in the world.

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Flyshooter

The flyshoot method is based on the technique of snurrevaard fishing. The ship sets nets using long thick lines. The big difference is that with the flyshoot method the ship is moving, unlike with the snurrevaad. This method also takes place during the day and the long lines are used to startle the fish so that they are scooped up into the nets. A disadvantage with this technique is that it hardly catches larger fish. This is because a relatively small mesh is used. The big advantage is that the quality of the catch is high.

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Fykes

Fykes are used mainly for freshwater fishing. There are several types of fykes, with the hoop fyke and the big fyke being the best known. Occasionally you may have seen poles sticking out of the water along a waterway. Those are big fykes, which are sometimes called standing fykes, each of which has a permanent home at the pole. A wing is usually attached to the trap. The wing is an upright net that guides the fish into the traps. Shooting fykes are smaller and are often linked together. Shooting fykes are loose on the bottom. Typically, the first ring is flattened so that the fyke does not fall over. At the beginning and end of the fyke is a dan buoy (a type of bobber) that ensures that the fish can be found.

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Garnalen Pulstuig

Het garnalen pulstuig is een nieuwe manier van elektronisch vissen en ondergaat een sterke ontwikkeling. Deze techniek is gebaseerd op het traditioneel garnaalvissen met de boomkor. We kennen echter ook de pulskor voor het vissen op andere vissoorten. Het garnalen pulstuig is een iets andere variant. Het grote verschil ten opzichte van traditioneel garnaal vissen is dat de onderpees met rollen niet meer aanwezig is. Aan de boom het men een pulsgenerator met elektroden bevestigd. De garnalen worden geprikkeld en springen op tot 15 cm overdag maar in het donker kunnen ze een halve meter opspringen en zo in het net  doen belanden. Dit vistuig door de Belgen ontwikkeld wordt ook wel de Hovercran genoemd. Hover betekend zweven het geen dit tuig ook doet en veel minder belastend is voor het milieu. Cran is een afgeleiden van Crangon het geen garnaal betekend. Deze innovatie is veel belovend.

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Geoduck farming

The farmed geoduck clam is raised on a commercial scale. To raise the clams tubes are used which are placed in the ground. The geoduck seed forms onto the tubes. The housing makes them easier to harvest. When the geoduck is commercially feasible, it is removed from the tube.

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Gillnet

The name Gillnet fishing is easy to explain. It is actually a wall of netting or just a single net that can be set in different directions. Gillnet can be set up along the bottom or it can float and it is built using floats with a weighted bottom line. The fish swim as if against a wall and get caught up in it. This method is simple and effective and is usually applied around wrecks or obstructions where fish are hiding. The Gillnet method is also used for catching tuna, snapper and swordfish-like species. Gillnet fishery is not considered sustainable. Gillnetting  at sea is regulated and has its ‘limitations’. The length of the net can be up to 25 km long. Oops! Is that really sustainable? Standing rigging fisheries can be divided into two groups.

The gillnet method uses a coarse net in which the fish’s head gets stuck so that it cannot escape. This method is particularly selective. Fish that are too big will not get stuck in the net while very small fish swim through it.

The entangling method is very effective. Entangling nets that are very fine-grained nets that are hung in front of the coarse gill net. It goes without saying that both large and small fish are caught herein.

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Gillnet Freshwater

The name Gillnet fishing is easy to explain. It is actually a wall of netting or just a single net that can be set in different directions. Gillnet can be set up along the bottom or it can float and it is built using floats with a weighted bottom line. The fish swim as if against a wall and get caught up in it. This method is simple and effective and is usually applied around wrecks or obstructions where fish are hiding. The Gillnet method in freshwater is mainly used for fishing pikeperch, pike ,mullets and crayfish-like species. Gillnet fishery is not considered sustainable. Gillnetting is regulated and has its ‘limitations’. The length of the net can be up to 25 km long

 

The gillnet method uses a coarse net in which the fish’s head gets stuck so that it cannot escape. This method is particularly selective. Fish that are too big will not get stuck in the net while very small fish swim through it.

The entangling method is very effective. Entangling nets that are very fine-grained nets that are hung in front of the coarse gill net. It goes without saying that both large and small fish are caught herein.

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Ground trawl

The ground trawl is similar to the single trawl technique. This method requires a lot more muscle. Large ships sail all over the world with powerful engines and drag large nets through the water. The trawl doors that are used to keep the net open sometimes have a circumference of more than two or three meters. With single trawl fishing it is at most a half to two meters, so there is a lot of soil disturbance. With this method one catches mainly less commercial fish species such as sandeel. It should be clear that there are also other types of fish that will not escape from the process. Industrial fishing catches mainly fish for fishmeal production. This method is practiced worldwide. Small fish is food for big fish, so when we talk about declining fish stocks we may have something to do here. Fishmeal is used for feeding farmed fish, but did you know that most of it is intended as a supplementary feed for pigs, cows and chickens?

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Hand-raking

The manual method of shellfish fishing can be described as being very labor intensive. Fishermen rake coastal waters using a dredge rake which is a kind of rake to which a net is secured. The quality of the catch is very high and the method can be called sustainable. There are many places in the world where this old technique is still applied.

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Handline

Hand lining is a way of fishing by hand. The fisherman has a roll of fishing line in his hand that he lets unwind. This type of fishing is also used commercially. It is often used by small fishermen who fish around islands and hunt skip jacks and snappers. This technique is sustainable but is very labor intensive.

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Harpoon

The harpoon is actually a modern version of archery. The harpoon is the forerunner of the rifle and the cannon. There are many variations in terms of harpoon. Sport anglers often use a harpoon, it is a powerful weapon that shoots arrows with a rubber band. Fisherman who use a harpoon shoot not always the fish directly into the head so that the fish can have much stress before it is dies.

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Harpooning Swordfish

In the waters of Canada one catches swordfish using a harpoon. This is actually a spear that one launches manually from the boat toward the fish. This is called ‘harpoon fishing’. With this method one catches swordfish and tunas. As this technique is practiced it is considered to be sustainable and some fishermen even have MSC certification. It is somewhat remarkable. The fish is pulled onto the boat with the line. When the fish is within reach, one throws a spear into the fish. A cable is attached to the spear so you can pull the fish in. Often the spear enters the fish’s flank instead of its head. The technique may be described as sustainable but is not exactly friendly. From the spear there is the chance the fish suffers a lot of stress.

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Hydraulic Dredge

The hydraulic dredge or hydraulic trawl is a modern variant based on the technique of dredging. With the hydraulic dredge one mainly catches seafood from the bottom. The big difference from the ordinary trawl is that this brings the shellfish onboard directly from the seabed using suction. The advantage of this method is that the shellfish are less damaged and often still alive, allowing them to be traded.

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Jigging

Squid can be collected in various ways. One method that is widely used to catch squid is known as squid jigging. The squid-jigger goes out at night. Once he is in location he lets out a long-line with branch lines (which are baited). Lots of bright light is shined into the water attracting the squid toward the surface. The squid starts looking for food in the light and takes the bait. This method of fishing is very profitable and also selective. There is no bycatch.

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Longline drifting

Longline fishing has several variations. The drifting longline is a long floating line equipped with multiple buoys. The floating line has smaller lines which have bait attached to them. The drifting longline is shorter than the traditional longline and is widely used to capture tuna-like species and other fish found near the surface of the sea. A serious fisherman works with circular hooks to reduce bycatch. Fish caught in this manner are of high quality.

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Longline Traps

Lobsters are mainly caught using baskets or traps. The Long line traps are placed on the bottom and are equipped with bait. After several hours, one brings the baskets to the surface to free the imprisoned lobsters. In some parts of the world the long line trap is used for catching fish as well. It is a sustainable method because it causes virtually no soil damage, it is highly selective, and requires virtually no fuel. The disadvantage is, of course, that it is labor intensive.

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Longlining

Longlining is the international term for fishing using lines. This sport dates back to antiquity. It is simply a long line with short branch lines that are provided with bait. A ship may put out one or more lines. This method of fishing depends on the tide (ebb and flow) and the layers in the water. Longline fishing is one of the better fishing methods. The type of bait used, depth and length determines everything for fishing. Thus, one can offer the bait on the bottom or in the middle or floating on the surface. The disadvantage of floating bait was that birds could not resist it, creating an unwanted bycatch for the fisherman! For this reason contemporary fishermen often use circular hooks that dramatically reduce the chance of catching birds and turtles. The longline is tens of kilometers long, but this method is also applied on a small scale. Quite a number of Norwegian and Icelandic fishermen use a line that is often no more than 4 km long. The quality of the fish caught with this method is very high.

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Manual harvesting

Manual harvesting is nothing more than picking up shellfish by hand from the low coastal waters when the tide is out. Shellfish are also manually searched for under water. Very experienced divers work for the commercial fishing industry to scour the seabed for scallops, razors and other shellfish armed only with a basket in which they deposit the sea treasures. This method is very labor intensive, but it can be called sustainable. The handpicked shellfish are brought ashore alive. It goes without saying that the quality is high.

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Outrig

As fishing with a twin rig uses less fuel than the beam trawl, the outrigger was invented. This technique is based on the beam trawl (see beam trawl). Using its two booms the ship puts out nets with trawl doors into the water on both sides. The big difference is that the beam is replaced by trawl doors (see twin rig or pair trawl). The catch is also different with outriggers. With the outrigger one catches mainly langoustines (Norwegian lobster) and plaice. There is also less bycatch relative to beam trawling. Fishing with the outrigger uses about half the amount of fuel. But the yields are different. For plaice and langoustines fishing one earns more per liter of diesel with the outrigger than with the beam trawl. To catch sole, turbot and brill, however, the beam trawler is better. Outrigging gear disturbs the surface of the seabed 22 percent less than the beam trawl gear and the percentage of bycatch is significantly lower.

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Pelagic trawling

Pelagic trawling is a technique in which the net can be drawn along either the top layer or the bottom layer of the water column. The depth of the net is determined based on the type of fish one is trying to catch. There are trawl doors on either side of the net to keep the net open. Pelagic trawling is similar to single trawling. Using pelagic trawling schools of fish such as mackerel and herring are caught.

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Pole & line

Pole and line is the international designation for fishing with a pole. A more sustainable fishing method does not exist. The line-caught fish is of the highest quality, as long as the fish is well taken care of. Worldwide, there are plenty of fishermen and traders who successfully put on the market the catch they’ve obtained by means of the rod. In Australia, a number of fishermen immediately spike the fish they catch. This is nothing more stabbing a pin through the head of the fish, so that it is killed instantly. This type of fishing is very sustainable. Nowadays, many line-caught fish are labeled as such.

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Pot fishery

One old technique for catching an octopus uses pots that are secured on a long line. The pots sink to the bottom and are picked up some time later. Because the octopus likes to hide itself by crawling into holes and crevices, it also gladly crawls into a waiting pot.

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Pots

In northern waters, one uses pots for catching king crab and snow crab. The pots are also called hives. The pots are usually baited and set out at a depth of 150 meters. The pots may be launched separately from one another; each pot comes with a buoy so it is easy to find.

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Pulse trawl

The operation of the pulse trawl is based on beam trawling. This new fishing technique is actually still in its infancy, but the practical results are very positive. The big difference is that the pulse trawl has no ticklers. These have been replaced by hoses that produce pulses of electrical current. It is an ingenious system that can be seen as the technology of the future. Depending on the height of the tension, one can anticipate the size of the fish catch. Because the current startles the fish they jump up out of the sand and end up in the net. The advantage of this method is that it has less bycatch. This technique is much kinder to the environment and saves a lot of fuel because the entire fishing gear is much lighter in weight. In summary, this technique is lighter, consumes less fuel, and is less damaging to the seabed, which thus promotes sustainability.

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Purse seine

Purse seining is also called ‘zegenvisserij’ in Dutch. Purse seining is a very effective way to catch fish. Using sonar, the fisherman locates a school of fish, and the boat lets out a long net around the school of fish. This fishing technique is also called ‘ringzegen’ in Dutch. Purse seining is used to capture Pelagic fish which are located in the water column (near the surface and not in or on the bottom) and swim in schools, such as salmon, herring and mackerel. This technique is also used to catch tuna. Once the fish are encircled one pulls up the bottom line bottom cord) of the net. This creates a kind of bag so the fish cannot escape. Tuna fishing that uses this technique causes the fish much stress and they can even be injured.

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Rope Cultivation

Nowadays mussels and oysters are usually farmed. There is a difference between bottom cultivation and rope cultivation. With rope cultivation the seeds are gathered in the same manner. The seed oysters or mussels are then placed in nets or stockings and hung on poles or buoys. Hence the name rope culture. The advantage of rope cultivation is that the shellfish grows faster.

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Sea based farming

Fish farming takes place all over the world. To start the process one hatches the fry in tanks on land. Once the fish have grown sufficiently, they are put in tanks at sea or in rivers. Fish farming is not without risks, as there are fish farms that are seriously polluting the environment. Sustainable farms also exist. Even the fry of the farmed fish are allowed to grow so that the wild population is not affected. The basins resemble large rings from which a net is secured that goes down as far as 40 meters.

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Shrimp fishery

Shrimp fishing in Europe is mainly done using the boom technique (see trawling). On either side of the ship a net (trawl) is lowered from the boom into the water. The big difference is that one does not use a tickler. On the leading edge of the net there is a row of plastic or rubber bobbins that roll over the bottom while the net is pulled along. The shrimp are startled and jump up into the net. The mesh size of the net is at least 20 mm. Even with this method there is bycatch. Once the catch is brought above water it is placed in a sieve tray and the bycatch is removed from the shrimp. Thanks to adjustments to the net, the bycatch largely survives and can be returned to the water alive. Shrimp fishermen, often in tropical parts of the world, catch shrimp with a large amount of bycatch that usually does not survive.

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Single trawl

With the single trawl the ship pulls a net that is fitted with trawl doors. The trawl doors are upright steel or wood plates placed on either side of the net. As the ship moves forward the trawl doors on the sides open the net. The opening of the net depends on the height of the trawl doors; usually the height is based on a 1 to 2 size ratio (length 2, height 1). The top side of the net has buoyancy, while the bottom side is weighted with one or two chains which startle the fish. Rollers may also be used if one has to deal with uneven ground or with stones lying on the ground. If one has to deal with uneven ground or with many stones on the bottom, then there may be gaps if only chains are used; therefore rollers or bobbins are used.

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Snurrevaad fishing

Snurrevaad fishing is a form of inshore fishing and it is also called anchor seine fishing. With this method long ropes (seine or cables) are used to close a big net. In snurrevaad fishing the boat is anchored and it draws in the net using a reel. This method is only used during the day when the visibility is good for the fish. Because the long cables trailing on the ground are noticeable to the fish, they are startled upwards and end up in the net. The net passes over the bottom without significantly disturbing or damaging it as the beam trawl does. Fish caught using this technique are of high quality.

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Span fishing

Span fishing, or twin trawling as it is also known, is based on the single trawl technique. It is a team of two ships which are both used to drag a single net. Trawl doors are unnecessary in pair fishing. Because both ships sail together they can keep the net fully open and thus surround the fish. This distance is determined by a so-called ‘head line’ which is a rope, usually made of nylon, that is attached to the front edge (the head) of both of the vessels. This ensures that they cannot sail apart and that the net is always open. This method is used primarily to catch round fish such as mackerel, sardine, whiting and cod. The net that is used is much larger and longer than what is used for a single trawl.

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Spear fishing

Spear fishing is perhaps the oldest technique used to catch fish. The spear, formerly often made of willow or hazelwood, was given a sharp point that was commonly made ​​of flint and usually shaped with a kind of barb. This technique is still used today, and not only in underdeveloped areas. The difficulty is hitting the fish because the fisherman must take into account the optical refraction at the water’s surface, which makes his prey look further away. With extreme precision one can directly pierce the fish. In earlier times whales were driven into shallower waters and then bombarded with spears. Because hitting the fish with the spear requires much force and speed it essentially led to the invention of bow fishing at a later stage. Technical progress later gave rise to the harpoon.

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Standing rigging fishing

The name standing rigging fishing is easy to explain. It is actually a wall of netting or just a single net that can be set in different directions. Standing rigging can be set up along the bottom or it can float and it is built using floats with a weighted bottom line. The fish swim as if against a wall and get caught up in it. This method is simple and effective and is usually applied around wrecks or obstructions where fish are hiding. Standing rigging fisherman in Europe catch fish such as sole, eel, turbot, sea bass and harder. The standing rigging method is also used for catching swordfish-like species. Standing rigging fishing has little bycatch and is considered sustainable. Standing rigging fishing at sea is regulated and has its ‘limitations’. The length of the net can be up to 25 km long. Oops! Is that really sustainable? Standing rigging fisheries can be divided into two groups.

The gillnet method uses a coarse net in which the fish’s head gets stuck so that it cannot escape. This method is particularly selective. Fish that are too big will not get stuck in the net while very small fish swim through it.

The entangling method is very effective. Entangling nets that are very fine-grained nets that are hung in front of the coarse gill net. It goes without saying that both large and small fish are caught herein.

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Stinger

Finding shellfish is manual and very labor intensive work. A widely used method is the use of the stinger. It is simple to use. The stinger is a type of gun that it stings the ground. Compressed air or water from the boat is pumped through long hoses to the gun that can blow the air or water around a Geoduck clam allowing it to be pulled easily from the ground. Once out of the ground the shellfish can be stored it in a basket while the fisherman looks for the next one. Modern technology has ensured that nowadays one can transport the shellfish to the ship using an ingenious suction system. In addition to using this fishing method in shallow waters, it can also be used deep under water.

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Sumwing

The sumwing capture method is based on the beam method. The big difference is that the beam is replaced by a sort of wing. The wing is adjustable, and the height is controlled by a probe which slides over the soil. The wing can be used with a tickler but that is really already outdated, the sumwing can also be combined with the pulse trawl (see pulse trawl). The application of the sumwing has great advantages: huge savings on fuel consumption and very little disturbance of the seabed.

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Table culture

Cultivating oysters and other shellfish on tables or racks is not uncommon. This method is qualitatively better than growing shellfish on banks or beds. The shellfish grow quickly and there is the advantage that small crabs and sand cannot enter the shells. Naturally, shellfish are influenced by the tides. Oysters get special treatment. They are often placed in baskets and turned several times in order to promote growth.

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Trawling

Trawling is a method of catching shellfish from the seabed. The trawl is a tubular steel frame over which a net is attached. On the front of the trawl are steel points that act as a kind of rake. Trawls are used for fishing for mussels, oysters, clams, scallops and other shellfish. A more sophisticated method is the hydraulic trawl.

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Trolling

Trolling is a method that uses two or more lines at a time. The lines are launched through the boom while the boat moves forward. The lines vary in length from 25 to 150 meters depending on the type of fish that is sought. With this method one catches fish on the upper level of the sea. Commercially, fish such as swordfish and tuna are the most important. This method is considered sustainable.

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Tuna trap

There are several methods used to catch tuna. The tuna trap is the most animal-friendly. The fish swims along a long net that directed it into captivity. The big advantage is that the fish experiences no stress and is not rushed. Once in the trap, the tuna is moved into the connected ring where all the trapped fish stay temporarily. When the ring is full the tuna are moved to the next ring. Fish farmers of high quality tuna “fatten up” the tuna by feeding them fresh fish.

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Twin rig

The twinrig method is nothing other than dragging two nets that are joined together horizontally. The centerpiece of the two nets is weighted with a slipper. Attached to both ends of the net are trawl doors that move outwards during sailing to open the net horizontally. It goes without saying that the ship must have substantial horsepower to be able to pull the net forward. Also with this method there is serious seabed disturbance, albeit less than in the fishing with outriggers. A further advantage relative to the trawl net is that there is less unwanted by-catch. Besides using it to catch fish on the bottom, this technique can also be used to catch fish in upper parts of the water, mainly round fish. The quality of the catch is good. Twin rig fishing is still emerging as a strong alternative to trawling. It is environmentally friendly because there is less fuel consumption and less soil disturbance than with beam trawling. The downside is that it cannot be used to catch sole. The twin rig can be used to catch langoustines.

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Weir fishing

Weir fishing is an ancient form of passive fishing. In early times this technique was mainly used to catch anchovies. Weather fishing was used in several places, where ebb waters partially dry up. A V-shaped construction is made consisting of two arms which are called vleuken. These are made from wood branches that are called weirwood. At the end where the vleuken meet a net is strung where the fish will eventually end up. The entire structure is called a weir. The operation is as simple as it is effective. Fish such as anchovies, herring and saury swim when the tide is low along the vleuken toward the deeper trap and eventually are imprisoned there. This type of fishing is hardly ever used in the contemporary world.

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