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The catching process The catching process starts as the fishing gear is deployed in the water and ends as it is retrieved from the water, be it ashore or on the deck of a fishing vessel. Throughout the catching process there may be encounters between the gear and various fish and other marine organisms, including sea birds, and bottom habitats. Ecosystem effects of fishing The effect of fishing on the ecosystem is primarily the removal of the organisms caught in the fishery, but also includes the direct and indirect effects caused by the gear during the catching process - like destruction of bottom habitats e.

Selectivity The selectivity of a certain fishing method depends on its ability to select the desired "target" species and sizes of fish from the variety of organisms present in the area where the fishery is conducted. The total selectivity of a fishing method is the combined result of the inherent selective properties of the fishing gear and the way it is operated. With most fishing gears it is possible to impair or improve the selectivity by changing the gear configuration or the operation.

The fisher can also select for target species and sizes by avoiding areas and periods where there is a high probability of catching small fish or otherwise undesired bycatch. The Code of Conduct requires the minimisation of the catch of non-target species and of discards Paragraph 7. Bycatch Bycatch is anything that is caught in the fishing process beyond the species and sizes of the targeted marine organisms. There is a great variety of bycatch species, ranging from sponges and corals to unwanted or unmarketable fish species or sizes, as well as turtles, marine mammals and sea birds.

Non-economic bycatches consist of organisms that are non-marketable for the fisher, while non-legal bycatches are sizes or species of marine organisms that are protected by regulations. Thus, marketable and legal bycatch is welcomed by the fisher, while all other bycatch should be avoided. However, the capture of some bycatch is normally unavoidable.

Most fisheries regulations do therefore allow for a certain amount of bycatch, e. For example, in the New Zealand trawl fishery for squid, a certain number of sea lions are tolerated as bycatch, but the fishery is closed as soon as this number is reached for the specific fishing season. Discards Discarding, which means to throw parts of the catch back into the water is a common practice in most fisheries, although the amount of discard varies significantly between different fisheries. Discards are most often organisms that are not marketable or give a low price compared with the more valued target species.

The survival of discarded organisms depends on the ability to survive in air, the time they are kept out of the water and how they are handled before being discarded. However, it should be expected that most discarded organisms suffer high mortality, which adds a "hidden mortality" to the fishing mortality that is calculated from the landed catch. Unintentionally, modern fisheries management has encouraged increased discarding in many fisheries. With the introduction of quotas and licences for different species it is often illegal to catch and land certain species of fish.

Thus it is not uncommon, particularly in mixed-species fisheries, to find large-scale discarding of valuable, marketable fish e. In addition, in some fisheries, small fish under the legal size limit for landings may also be discarded. This phenomenon is also often linked to a quota system where the fisher tries to get the maximum value from a limited quota by keeping only the most valuable part of the catch and discarding the rest. By-mortality By-mortality is the mortality of marine organisms from injures caused by encounter with the fishing gear during the fishing process.

One example is fish that die from infections or osmotic imbalance caused by scale loss after escapement through trawl or gillnet meshes. The introduction of mesh size regulations e. If the released fish suffer high mortality there is little to be gained by sorting it out of the fishing gear, which is the case with vulnerable species like herring. On the other hand, studies have shown that cod and several other demersal species have high survival rate after escapement from or encounter with fishing gear.

Ghost fishing The term "ghost fishing" is used to describe the capture of marine organisms by lost or abandoned fishing gear. This is particularly a problem with gillnets, trammel nets and pots. The gear is usually lost because it becomes stuck on rough bottoms containing corals and stones, causing the buoy line to break during retrieval. Nets or pots may then continue to fish for years. Captured fish and crustaceans will die and serve as attracting bait for more fish and other organisms. Ghost fishing may therefore represent a serious problem in many areas, causing "hidden fishing mortality" over a long period of time.

Paragraphs 7. Habitat effects Destruction of bottom habitats is particularly a problem with the use of dragged demersal gear like beam trawls, otter trawls and dredges. Corals and other epifauna have been and may be destroyed over large areas. It is still debated as to whether these gears have any real negative effect on soft, sandy bottoms.

However, it has been documented that trawling has ruined large areas of coral, which has a very low recovery rate, and other epifaunal organisms. Here, the Code of Conduct calls for the development and use of environmentally safe fishing gear Paragraph 7.

Catch quality Properties of fishing gears and the way in which they are operated also affect the quality of the catch, thus having an indirect ecosystem effect by the misuse of natural resources. In gillnet fishing, poor quality results from too long a soak time. This results in fish dying in the nets and either rotting or becoming damaged by scavengers; therefore, that part of the catch is not marketable and has to be discarded.

This may also be a problem in longline and pot fishing. In trawling, particularly with large catches, it is not uncommon that part of the catch is ruined by squeezing in the trawl bag or becomes of inferior quality because of too long storage on deck before it is processed. This too is contrary to the requirements of the Code of Conduct Paragraph 8. Energy efficiency Use of energy, particularly fossil fuel, is also an ecosystem related aspect of fisheries. The energy efficiency i. This is covered in Sub-article 8. Pollution Fisheries can contribute to air pollution through emission of combustion gases.

The relative pollution effect from different fisheries is closely related to their energy efficiency. Pollution of water from fisheries is mainly by loss of fishing gear or by deliberately discarding old gear and equipment as well as oil products and chemicals at sea. These two aspects are covered by Sub-articles 8.

For a proper evaluation of the ecosystem effects of fishing, each specific fishery has to be analysed separately, as the selectivity properties and ecosystem effects of a certain fishing method may vary considerably with geographical area, time of year and how the gear is operated. A few examples are the following. So even if the intrinsic selective properties and other ecosystem impacts of a certain fishing gear may be regarded as fairly constant, the effects caused by the gear on fish stocks and the rest of the ecosystem may vary with diurnal, seasonal and long term changes in species and size composition of organisms available to the fishing gear and with differences in fishing practice.

However, due to entangling a small proportion of larger and smaller fish may be taken. The species selectivity of gillnets is not particularly good and as different fish species grow to different sizes, there is always a possibility of catching juveniles of a large species when using small mesh gillnets for a smaller target species. Another negative impact of gillnets is the bycatch of sea birds, marine mammals and turtles.

Although little information exists on the real effect of such bycatches on the populations of these organisms, it has generated concerns, particularly for pelagic gillnet fishing. Information on by-mortality of fish after escapement from gillnets is scarce. However, observations of fish with wounds from gillnet meshes are commonly made in catches by other gears, but the actual mortality rates from such injuries are not known.

Ghost fishing is one of the most criticized aspects of gillnet fishing, and may have severe negative effects, particularly in deep water gillnet fisheries. The energy efficiency of gillnet fishing is generally high with a correspondingly low air pollution effect. As mentioned above, the catch quality of gillnet caught fish can be high. However, gillnets that are operated with soak times of several days tend to produce catches of inferior quality, as fish caught early in the fishing period may die and start to deteriorate long before the nets are retrieved.

The problem of ghost fishing is, however, lower as trammel nets generally are operated in shallow water with less risk of gear loss, but ghost fishing problems should nevertheless be anticipated due to loss of trammel nets that get stuck on rough bottoms like coral reefs. However, these gears are commonly used in specific seasons or at specific grounds where the fishers, by experience, are able to catch only one or a few species, so that the catches are usually dominated by a few targeted species. Otherwise, handlining and trolling are generally regarded as ecosystem-friendly ways of fishing which produce catches of high quality.

The species selectivity of longlines can clearly be affected by the type of bait used, as different species have been shown to have different bait preferences. The size selective properties can partly be regulated by the hook and bait size as many studies have shown a correlation between the size of hook and bait and the size of the fish caught. The longline attracts fish from several hundred meters away, and as large fish have a greater swimming and feeding range than smaller fish, this adds to the size selective properties of longlines. Bycatch of marine mammals is no particular problem with longlining, but there might be significant bycatches of different seabirds, which mainly are caught as they try to catch the baited hooks during the setting of the lines.

The IPOA specifies some optional technical and operational measures for reducing the incidental catch of seabirds, including, for example, increasing the sinking rate of baits and the use of bird scaring lines which are towed behind the vessel, above the longline being set. Little is known about the by-mortality of fish in longline fishing, but fish that are lost during retrieval of longlines do often suffer mortality.

Ghost fishing may be regarded as a minor problem with longlining and this gear is not considered to cause significant adverse habitat effects. The energy efficiency of longlining is generally high, with typical energy coefficients from 0,1 to 0,3 kilogram fuel per kilogram of landed catch , which is in the same range as that of gillnetting. Longline caught fish are in general of high quality, but as is the case for gillnetting, long soak times may lead to reduced catch quality mainly due to bottom scavengers sea lice, hagfish that may attack and eat parts of the hooked fish.

Lobster fishermen do for instance often use "sour" or rotten fish as bait to avoid catching crabs in their lobster pots. As with longlines, the attraction of fish and crustaceans to baited pots tends to attract the larger animals in the fished area. The size selectivity of pots may be further improved by the use of so called escape gaps, the size of which allows for escapement of smaller animals.

By-mortality is not regarded as a problem with pot fishing and this gear has negligible effect on bottom habitats. There is, however, a certain risk of ghost fishing, as lost pots may continue to fish long after they are lost. This can be reduced by having certain parts of the pot made from a bio-degradable material. Furthermore, pot fishing is regarded to have a high energy efficiency and good to superior catch quality, as the catch normally remains alive and in good condition.

As the caught animals usually stay alive, and as traps are most often operated in shallow water, they allow for easy release and high survival of unwanted catch organisms. With responsible fishing practices, the actual selectivity properties of traps may therefore be good and the by-mortality is low. Traps in general have little adverse impact on bottom habitats, they do not create ghost fishing problems and the energy efficiency and catch quality of trap fishing are high.

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As the target is identified before capture, the fisher can be very selective regarding both species and size of prey. Fishing with spear or harpoon may give some by-mortality of wounded animals that escape and, when used in reef areas, the use of spears can lead to damage of coral, but apart from these, there are no substantive adverse effects related to ghost fishing or habitat destruction and the energy efficiency and catch quality is high. The size selectivity is poorer as the fish bag of the trawl is usually made from small mesh webbing to avoid meshing by smaller individuals.

Successful trials have been done with sorting grids that effectively release the smallest fish e. However, these have not been applied in practical fishing, as many pelagic fish seem to suffer high mortality after being released from the fishing gear - mainly caused by the loss of scales which easily leads to secondary infections and osmotic imbalance.

At present, sorting systems for the release and protection of juvenile pelagic fish is therefore not recommended. By-mortality is hence a minor problem with pelagic trawling and this gear, naturally, does not have any ghost fishing or habitat destructive effects. The fuel consumption of pelagic trawling can be high, but still the energy efficiency might be relatively good as large catches are often made during short time periods.

The catch quality of pelagic trawls is also relatively high, although large catches may give some squeeze and pressure damage to the fish in the trawl. The size selectivity may to a certain degree be regulated by the cod-end mesh size. Ideally, a certain mesh size should allow for the release of all fish below a certain size. However, the mesh size selection of trawls may be hampered in many ways.

With increasing catch load in the cod-end, the meshes tend to stretch and close, so that the effective mesh size is significantly reduced. Clogging closing of meshes by fish getting stuck in them is another common problem that leads to poorer selectivity. The choice of mesh size for a certain target species may not give ideal selection of other species with different growth characteristics, a problem that is related to all mixed-species fisheries.

Considerable research and development effort has been spent in recent years to improve the size and species selectivity of trawl gear. Different solutions have been developed and implemented, like the sorting grid that is now used in many demersal trawl fisheries. Figure 10 illustrates the sorting grid which is now mandatory in the Barents Sea bottom trawl fishery for cod and other demersal species.

Most of the juvenile fish will escape through the openings between the metal bars of the grid, while larger fish will be retained. Figure Section of fish trawl with sorting grid. Smaller fish are released through the grid slots, while larger fish swim or are swept down under the grid and go to the cod end. Where introduced, sorting grids and other selective devices such as larger square mesh panels and escape gaps have lead to improved selectivity of bottom trawls, first of all the size selectivity, but also the species selectivity, although there is still a need for further improvements.

Releasing juvenile fish has little benefit if they do not survive. Extensive studies that have been carried out on demersal target species like cod and haddock have shown very low by-mortality of fish that have escaped through meshes or sorting grids. Although studies of survival after escapement so far have only been done for a restricted number of species, there seems to be a general indication of high survival of demersal fish after encounters with and escapement from fishing gears, when the fish are sorted out and released at fishing depth.

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Demersal trawls do inevitably have an effect on bottom habitats. Several studies have been carried out within this field, however, without any general conclusions. On soft and sandy bottoms, there might be an inverse effect on the species composition in an area with a shift towards species that are less dependent on the epifauna removed by trawling. Most studies do, however, indicate that soft bottom habitats will be restored after some years without trawling On hard bottom, trawling is likely to cause more long lasting or irreversible habitat effects, e. Large areas of coral bed have already been destroyed by bottom trawling, particularly with the development of heavier and stronger trawl gear.

Trawls are occasionally lost, but this gear loss is not associated with any risk of ghost fishing. The energy efficiency of demersal trawling is low and air pollution from the emission of exhaust gases is correspondingly high due to the high energy needed for pulling the net, doors, sweeps and warps through the water. The catch quality of trawl caught fish varies with the amount of catch and the towing time. Large catches do often lead to lower catch quality because of the squeezing of the fish in the trawl bag and a longer time before the last part of the catch is processed on board.

This is due to the small meshes that have to be used in shrimp trawls in order to retain these relatively small target species. Shrimp trawling does therefore produce relatively large amounts of bycatch and a high proportion of this is discarded. The development of sorting grids has, however, improved the species- and size selectivity in many shrimp trawl fisheries, as most fish over a certain size are released from the trawl through the sorting grid or bycatch reduction device Figure Bycatch of the youngest fish groups year olds is still a problem, as they have overlapping sizes with those of the shrimps.

If the player attempts to utilize any light besides Artyom's Lighter or the few torches and candles scattered throughout the areas the Darkness is found in, the screen will once again distort, and the device will not turn on. It is worth noting that the disruptive effects of the anomaly are not tied down to any one location, and can apparently appear and disappear at a moment's notice.

When encountered during the level Khan, the darkness suddenly takes hold in an area that had previously been unaffected, causing the lightbulb on a discarded-but-running headlamp to go out.

This Book Does Not Exist 2: New Ghosts To Chase (Part I)

This hints that the darkness moves, as sort of a cloud of mist. A ghost story told by a group of enemies in Bandits seems to corroborate this, with the bandits explaining that they encountered the darkness in the form of a black mist in a dark tunnel.

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Moreover, it would also appear that the effect of disabling electrical illumination is not indiscriminate, as IRNV scopes , laser sights and reflex sights continue to function normally while flashlights and night vision goggles are entirely disabled. In one case, the lights illuminating a drainage tunnel still continued to function despite being within the affected area. The darkness acts as a tool and signal for the developers to forcefully and intentionally signal a slow-down in pace and a build-up in atmosphere. Artyom is thus forced to proceed into an area with only the dim flame of the lighter or the claustrophobically narrow field of view of the IRNV scope to show the way, which has the effect of making the player pay closer attention to their surroundings and take notice of details that might otherwise have gone ignored.

Damned Souls is one of many fan-terms for ghosts appearing on the surface in Red Square.

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Damned Souls manifest as the upper body or arms of restless, immobile beings trapped in a limbo between life and death and gathered to the "centre" of Moscow - where all roads lead to. The Dark One states that they do not know they are dead, and they are terrified and lonely, grabbing onto anyone that ventures near because they wish for someone to stay with them.

As such, the Damned Souls are the only type of ghost that could be considered "hostile" to Artyom, as well as the only ones in Last Light capable of hurting or killing him: should he not follow the the Dark One at a fast enough pace, he will start to take damage as a warning sign to follow the Dark One more closely , and eventually die. Upon first contacting the Damned souls, the Dark One saves Artyom from the damned souls and leads him out of their domain. Later, after viewing Pavel's memories, Artyom and Pavel are dragged into a pit of damned. Here the player is given a choice to have Artyom save Pavel, or leave him to join the damned, killing him.

Leaving Pavel to die at the hands of the damned souls might serve as a metaphor for Artyom simply not putting a new filter into Pavel's gas mask , and as a result he suffocates. Ghosts do not appear in the Metro , however early on Artyom hears a tale in which one wanderer ventures to cross from Tulskaya station to the end of the line that is completely abandoned. Once in the Sevalstopolskaya Station, the wanderer sees a silent but completely functional train with its blinding lights, passing away from the platform to the tunnel, full of ghosts.

Only the laugh of a child can be heard from the ghost train. This is proven to be false in Metro , as Sevastopolskaya is inhabited. It is, however, from time to time implied that ghosts exist, but it is never confirmed nor denied. When Artyom reaches Polyanka, he meets two friendly men, with a cat, who smoke around a bonfire. After a brief philosophical chat with them, Artyom is forced to cross the last tunnel to Polis. The Council explains to Artyom that the station is completely abandoned and nobody can live there; Polyanka seems a ghostly station and projects strange visions when some people pass through.

Because of this, it is suspected that the two men, along with the cat, at Polyanka were ghosts, though Artyom finds it difficult to believe. Though ghosts are never directly seen, several seemingly supernatural events occur. While traveling to Rizhskaya station from Alekseevskaya, Artyom starts hearing singing pipes, while all of his companions gradually become incapacitated.

Artyom, who seems to be immune, is forced to rescue them. The event is later explained as the crew having a reaction to a strange gas coming from the pipes. After hearing about the event, Bourbon hires Artyom to escort him along the Sucharevska line, since he seems to be immune to the gas. During the trip, both Artyom and Bourbon start to act weirdly: Artyom becomes very talkative while Bourbon starts to chant a very odd text, which later in the novel turns out to be an excerpt from one of the books that Polis' Brahmins are searching for, finishing the speech with "I've died, there is no more me," then dropping to the ground - lifeless.

Artyom tries to drag the man's body to the nearest station but to no avail. When Artyom is about to lose himself, Khan comes to the rescue, taking Bourbon's backpack and convincing Artyom to follow him, leaving the other man's body behind. At Sucharevskaya, Khan convinces the men camping there to travel with them, after one of their comrades runs into the southern tunnel and is seemingly killed by an unknown entity.

After they reach Turgenevskaya, Khan claims they must travel through the left-hand tunnel to avoid "a darkness". All of the men besides Ace refuse to accompany Khan, as traveling through in the opposite direction of a tunnel is considered a bad omen. Are we to imagine this is also Roth? A man who creates reams of stories out of a life in isolation? But an author is not his fiction; to say otherwise is an insult to his imaginative powers.

It could be an interesting story. He wrote for most of his life, without stopping, about every stage of life as a writer, a man, and a Jew in the postwar decades. Roth the present is in constant conversation with his ghosts past and future; he is eternally the ghost of the present. If I was to suggest a shortcoming it would be that art which has come from so deep within should have at least one kernel of human truth that I, too, can hold.

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It is difficult to find a meaningful piece of myself in The Ghost Writer because the obstacles are so blatant and so high. Now, she lusts for the fat, aging Lonoff. The only character I might connect with is E. This does not feel like a special connection. Yet Zuckerman fails to soak it all up, to get out of his head, to even be in the room. He ends up dwelling on his anger towards his father, indulging in self-pity, and masturbating.