Environmental impact of fishing

The environmental impact of fishing includes issues such as the availability of fish, overfishing, fisheries, and fisheries management; as well as the impact of industrial fishing on other elements of the environment, such as bycatch.[1] These issues are part of marine conservation, and are addressed in fisheries science programs. According to a 2019 FAO report, global production of fish, crustaceans, molluscs and other aquatic animals has continued to grow and reached 172.6 million tonnes in 2017, with an increase of 4.1 percent compared with 2016.[2] There is a growing gap between the supply of fish and demand, due in part to world population growth.[3]

Fishing down the food web
Greenhouse gas emissions (kg / kg edible weight) of wild-caught and farmed seafood products

Fishing and pollution from fishing are the largest contributors to the decline in ocean health and water quality. Ghost nets, or nets abandoned in the ocean, are made of plastic and nylon and do not decompose, wreaking extreme havoc on the wildlife and ecosystems they interrupt. The ocean takes up 70% of the earth, so overfishing and hurting the marine environment affects everyone and everything on this planet. On top of the overfishing, there is a seafood shortage resulting from the mass amounts of seafood waste, as well as the microplastics that are polluting the seafood consumed by the public. The latter is largely caused by plastic-made fishing gear like drift nets and longlining equipment, that are wearing down by use, lost or thrown away.[4][5]

The journal Science published a four-year study in November 2006, which predicted that, at prevailing trends, the world would run out of wild-caught seafood in 2048. The scientists stated that the decline was a result of overfishing, pollution and other environmental factors that were reducing the population of fisheries at the same time as their ecosystems were being annihilated. Many countries, such as Tonga, the United States, Australia and Bahamas, and international management bodies have taken steps to appropriately manage marine resources.[6][7]

Reefs are also being destroyed by overfishing because of the huge nets that are dragged along the ocean floor while trawling. Many corals are being destroyed and, as a consequence, the ecological niche of many species is at stake.

Mean greenhouse gas emissions for different food types[8]
Food types Greenhouse gas emissions (g CO2-Ceq per g protein)
Beef
62
Recirculating aquaculture
30
Trawling fishery
26
Non-recirculating aquaculture
12
Pork
10
Poultry
10
Dairy
9.1
Non-trawling fishery
8.6
Eggs
6.8
Starchy roots
1.7
Wheat
1.2
Maize
1.2
Legumes
0.25

Effects on marine habitat
Main articles: Blast fishing, Cyanide fishing, Bottom trawling, and Ghost net
A sea turtle killed by a boat propeller

Some fishing techniques cause habitat destruction.[9][10] Blast fishing and cyanide fishing, which are illegal in many places, harm surrounding habitats.[9] Blast fishing refers to the practice of using explosives to capture fish.[9] Cyanide fishing refers to the practice of using cyanide to stun fish for collection.[9] These two practices are commonly used for the aquarium trade and the live fish food trade.[9] These practices are destructive because they impact the habitat that the reef fish live on after the fish have been removed. Bottom trawling, the practice of pulling a fishing net along the sea bottom behind trawlers, removes around 5 to 25% of an area's seabed life on a single run.[11] This method of fishing tends to cause a lot of bycatch.[10] A study of La Fonera Canyon compared trawled versus non-trawled areas. The results show that areas at 500 to 2000 meters depth that is non-trawled have more biodiversity, biomass, and variation of meiofauna than trawled areas at 500 meters depth.[12] Most of the impacts are due to commercial fishing practices.[13] A 2005 report of the UN Millennium Project, commissioned by UN Secretary-General Kofi Annan, recommended the elimination of bottom trawling on the high seas by 2006 to protect seamounts and other ecologically sensitive habitats. This was not done.

In mid-October 2006, United States President George W. Bush joined other world leaders calling for a moratorium on deep-sea trawling. The practice has shown to often have harmful effects on sea habitat and, hence, on fish populations,[14] yet no further action was taken (Vivek). The sea animal's aquatic ecosystem may also collapse due to the destruction of the food chain.

Additionally, ghost fishing is a major threat due to capture fisheries.[15] Ghost fishing occurs when a net, such as a gill net or trawl, is lost or discarded at sea and drifts within the oceans and can still act to capture marine organisms.[15] According to the FAO Code of Conduct for Responsible Fisheries, States should act to minimize the amount of lost and abandoned gear and work to minimize ghost fishing.[16]

Overfishing
This section is an excerpt from Overfishing.[edit]
Jack mackerel caught by a Chilean purse seiner
Fishing down the food web

Overfishing is the removal of a species of fish (i.e. fishing) from a body of water at a rate greater than that the species can replenish its population naturally (i.e. the overexploitation of the fishery's existing fish stock), resulting in the species becoming increasingly underpopulated in that area. Overfishing can occur in water bodies of any sizes, such as ponds, wetlands, rivers, lakes or oceans, and can result in resource depletion, reduced biological growth rates and low biomass levels. Sustained overfishing can lead to critical depensation, where the fish population is no longer able to sustain itself. Some forms of overfishing, such as the overfishing of sharks, has led to the upset of entire marine ecosystems.[17] Types of overfishing include: growth overfishing, recruitment overfishing, ecosystem overfishing.

The ability of a fishery to recover from overfishing depends on whether its overall carrying capacity and the variety of ecological conditions are suitable for the recovery. Dramatic changes in species composition can result in an ecosystem shift, where other equilibrium energy flows involve species compositions different from those that had been present before the depletion of the original fish stock. For example, once trout have been overfished, carp might exploit the change in competitive equilibria and take over in a way that makes it impossible for the trout to re-establish a breeding population.

Since the growth of global fishing enterprises after the 1950s, intensive fishing has spread from a few concentrated areas to encompass nearly all fisheries. The scraping of the ocean floor in bottom dragging is devastating to coral, sponges and other slower-growing benthic species that do not recover quickly, and that provide a habitat for commercial fisheries species. This destruction alters the functioning of the ecosystem and can permanently alter species' composition and biodiversity. Bycatch, the collateral capture of unintended species in the course of fishing, is typically returned to the ocean only to die from injuries or exposure. Bycatch represents about a quarter of all marine catch. In the case of shrimp capture, the bycatch is five times larger than the shrimp caught.

A report by FAO in 2020 stated that "in 2017, 34 percent of the fish stocks of the world’s marine fisheries were classified as overfished".[18]: 54  Mitigation options include: Government regulation, removal of subsidies, minimizing fishing impact, aquaculture and consumer awareness.

Ecological disruption

Overfishing can result in the over-exploitation of marine ecosystem services.[19] Fishing can cause several negative physiological and psychological effects for fish populations including increased stress levels and bodily injuries resulting from lodged fish hooks.[20] Often, when this threshold is crossed, hysteresis may occur within the environment.[19] More specifically, some ecological disturbances observed within the Black Sea marine ecosystem resulted from a combination of overfishing and various other related human activities which adversely affected the marine environment and ecosystem.[21] Ecological disruption can also occur due to the overfishing of critical fish species such as the tilefish and grouper fish, which can be referred to as ecosystem-engineers.[22]

Fishing may disrupt food webs by targeting specific, in-demand species. There might be too much fishing of prey species such as sardines and anchovies, thus reducing the food supply for the predators. Disrupting these types of wasp-waist species may have effects throughout the ecosystem.[23] It may also cause the increase of prey species when the target fishes are predator species, such as salmon and tuna.

Overfishing and pollution of the oceans also affect their carbon storage ability and thus contribute to the climate crisis.[24][25][26] Carbon stored in seafloor sediments risk release by bottom-trawling fishing.[27][28]

Fisheries-induced evolution
Main article: Fisheries-induced evolution

Fisheries-induced evolution or evolutionary impact of fishing is the various evolutionary effects of the fishing pressure, such as on size or growth. It is manly caused by selective fishing on size, bigger fish being more frequently caught. Moreover, policy of minimum landing size, based on the idea that it spares young fishes, have many negative impacts on a population by selecting slow growth individuals.

Bycatch
Main article: Bycatch
Bird unintentionally caught as bycatch in drift net

Bycatch is the portion of the catch that is not the target species.[29] Unintentional bycatch occurs when fishing gear with poor selectivity is used.[29] These are either kept to be sold or discarded. In some instances the discarded portion is known as discards. Even sports fisherman discard a lot of non-target and target fish on the bank while fishing. For every pound of the target species caught, up to 5 pounds of unintended marine species are caught and discarded as bycatch.[30] As many as 40% (63 billion pounds) of fish caught globally every year are discarded, and as many as 650,000 whales, dolphins and seals are killed every year by fishing vessels.[31][32]

Shark finning and culling

Shark finning
Main article: Shark finning

Shark finning is the act of removing fins from sharks and discarding the rest of the shark. The sharks are often still alive when discarded, but without their fins.[33][34] Unable to swim effectively, they sink to the bottom of the ocean and die of suffocation or are eaten by other predators.[35] Though studies suggest that 73 million sharks are finned each year,[36] scientists have noted that the numbers may actually be higher, with roughly 100 million sharks being killed by finning each year.[37] The deaths of millions of sharks has caused catastrophic damage to the marine ecosystem.[36]

Shark culling
Main article: Shark culling

Shark culling is the killing of sharks in government-run "shark control" programs.[38] These programs exist to reduce the risk of shark attacks — however, environmentalists say that they do not reduce the risk of shark attacks; they also say that shark culling harms the marine ecosystem.[39][40] Shark culling currently occurs in New South Wales, Queensland, KwaZulu-Natal and Réunion.[40][41][42] Queensland's "shark control" program killed roughly 50,000 sharks between 1962 and 2018 — Queensland's program uses lethal devices such as shark nets and drum lines.[43][40] Thousands of other animals, such as turtles and dolphins, have been killed in Queensland as bycatch.[44] Queensland's shark culling program has been called "outdated, cruel and ineffective".[45] The shark culling program in New South Wales (which uses nets) has killed thousands of sharks, turtles, dolphins and whales.[40] KwaZulu-Natal's shark culling program killed more than 33,000 sharks in a 30-year period.[41]

Marine debris
Main article: Marine debris
Turtle entangled in marine debris

Recent research has shown that, by mass, fishing debris, such as buoys, lines, and nets, account for more than two-thirds of large plastic debris found in the oceans.[46] In the Great Pacific Garbage Patch, fishing nets alone comprise at least 46% of the debris.[47] Similarly, fishing debris has been shown to be a major source of plastic debris found on the shores of Korea.[48] Marine life interacts with debris in two ways: either through entanglement (where debris entangles or entraps animals), or ingestion of the debris (either intentionally or accidentally).[49] Both are harmful to the animal.[49] Marine debris consisting of old fishing nets or trawls can often be linked to phenomena such as ghost fishing, wherein the netting debris, referred to as ghost nets, continues to entangle and capture fish.[50] A study performed in southern Japan on octopuses noted that there was an estimated mortality rate of 212,000–505,000 octopuses per year within the area's fishing grounds, due in large part to ghost fishing.[51] Tracking garbage and monitoring the logistics of human waste disposal, especially waste materials primarily associated with fishing, is one method to reduce marine debris.[50][52] Using technological or mechanical innovations such as marine debris-clearing drones can further serve to reduce the amount of debris within oceans.[50][52]

Recreational fishing impacts
Main article: Recreational fishing

Recreational fishing is fishing done for sport or competition, whereas commercial fishing is catching seafood, often in mass quantities, for profit. Both can have different environmental impacts when it comes to fishing.[53]

Though many assume recreational fishing does not have a large impact on fish, it actually accounts for almost a quarter of the fish caught in the United States, many of those being commercially valuable fish.[54] Recreational fishing has its biggest impact on marine debris, overfishing, and fish mortality. Release mortality in recreational fisheries is the same as the impacts of bycatch in commercial fisheries.[53] Studies have suggested that improving recreational fisheries management on a global scale could generate substantial social benefits of the same scale as reforming commercial fisheries.[55]

Catch and Release

Catch and release fishing involves several practices that aim to reduce the negative environmental impacts of fishing.[20] This refers to the duration, timing, and type of hook used during angling.[20] To increase the effectiveness of catch and release fishing and mitigate its negative impacts, species-specific guidelines are required.[20] These guidelines help tailor specific rules and regulations to specific species of fish in relation to their locations and mating and migration cycles.[20] A metastudy in 2005 found that the average catch and release mortality rate was 18%, but varied greatly by species.[56] While catch-and-release fishing has been wildly used in recreational fishing, it is also beneficial for maintaining fish populations at a stable level for commercial fisheries to receive social and economic benefits.[57] Combining catch and release fishing with biotelemetry data collection methods allows for researchers to study the biological effects of catch and release fishing on fish in order to better suit future conservation efforts and remedies.[57]

Countermeasures

Fisheries management
Main article: Fisheries management

Much of the scientific community blames the mismanagement of fisheries for global collapses of fish populations.[58] One method for increasing fish population numbers and reduce the severity of adverse environmental impacts and ecological disturbances is the use of fisheries management systems.[59] Traditional fisheries management techniques can signify restricting certain types of fishing gear, reducing the total allowable catch, decreasing fishing efforts as a whole, implementing catch shares, involving communities with conservation efforts and defining areas closed to fishing.[59][60] In order to implement any of these tactics on a fishery, ample data collection and statistical analysis are necessary.[59]

Whether or not traditional fisheries management techniques are effective at restoring fish populations is often seen as a debate in the fisheries science community.[59] However, there are a few factors to consider when evaluating the efficiency of fisheries management techniques.[59] For example, large fisheries are more likely to be managed whereas small fisheries are commonly left unassessed and unmanaged.[59] Unassessed fisheries are thought to represent about 80% of all fisheries.[61] Some researchers believe that the stability and health of these unassessed fisheries are worse than the assessed fisheries, justifying the premise that traditional fisheries management techniques are ineffective.[61] However, many scientists highlight that those fish populations are declining due to the fact that they have not been assessed and therefore adequate fisheries management techniques have not been applied.[58][59] Further, most of the assessed fisheries (and hence managed fisheries) are biased towards large populations and commercially lucrative species.[59] Assessments are often performed by nations that are able to afford the assessment process and implementation of fisheries management tools.[59]

Determining sustainable harvest quotas are another example of a traditional fisheries management technique.[58] However, the intention behind harvest quotas are often not a big enough incentive for fishermen to adhere to them.[58] This is because limiting individual harvests often leads to a smaller profit for the fleet.[58] Since these fishermen are not guaranteed compensation for part of the quota, they tend to resolve to the method of harvesting as many fish as possible.[58] This competitiveness among fishermen and their fleets leads to the increased use of harmful fishing practices, extremely large harvests, periods of reduced stocks and the eventual collapse of the fishery.[58] To eliminate the need for such competitiveness among fishermen, many scientists suggest the implementation of rights-based fisheries reforms.[59][58] This can be done by granting Individual Transferable Quotas (ITQs) or catch shares, a set portion of a scientifically calculated total allowable catch, to individual fishermen, communities and cooperatives.[58] ITQs incentivize fishermen because the value of catch shares grows as the stability of the fishery improves.[58]

It is estimated that around 27% of global fisheries were classified as collapsed in 2003 and that by 2048, 100% of global fisheries would be considered collapsed.[62] In a study compiling data from 11,135 fisheries around the world (some ITQ-managed, some non-ITQ managed), the potential impact of ITQs on fisheries if they all implemented a rights-based management approach since 1970 was estimated.[58] In that case, the percentage of collapsed fisheries in 2003 was projected as 9%, which remained fairly stable for the rest of the experiment's time period.[58] Despite the projected success of the ITQ-managed fisheries, the results of this study may not be a completely accurate representation of the true impact of right-based management.[58] This is due to the fact that the data used to create these results was limited to one type of catch share and that the true effects of ITQs can only be assessed if social, ecological and economic factors were also considered.[58]

In some cases, changing fishing gear can have an impact on habitat destruction.[63] In an experiment with three different types of gears used for oyster harvesting, compared to dredging and tonging, hand-harvesting by divers resulted in the collection of 25-32% more oysters within the same amount of time.[63] In terms of habitat conservation, the reef habitat sustained damage to its height during the use of all three gear types.[63] Specifically, dredging cut the height of the reef by 34%, tonging by 23% and diver hand-harvesting by 6%.[63]

A 9/0 J hook and a 18/0 circle hook.

Opting for a different hook design or bait type can make fishing practices less dangerous and lead to less bycatch.[64] Using 18/0 circle hooks and mackerel for bait has been shown to greatly reduce the amount of leatherback sea turtles and loggerheads caught as bycatch.[64] The use of circle hooks was shown to decrease the amount of hooks ingested by loggerheads.[64] Further, with the target species being swordfish, the use of both circle hooks and mackerel for bait had no negative impact on the amount of swordfish caught.[64]

Ecosystem-based management of fisheries is another method used for fish conservation and impact remediation.[59][61] Instead of solely focusing conservation efforts on a single species of marine life, ecosystem-based management is used across various species of fish within an environment.[59][61] To improve the adoption of these types of fisheries management, it is important to reduce barriers to entry for management scenarios in order to make these methods more accessible to fisheries globally.[59]

Many governments and intergovernmental bodies have implemented fisheries management policies designed to curb the environmental impact of fishing. Fishing conservation aims to control the human activities that may completely decrease a fish stock or washout an entire aquatic environment. These laws include the quotas on the total catch of particular species in a fishery, effort quotas (e.g., number of days at sea), the limits on the number of vessels allowed in specific areas, and the imposition of seasonal restrictions on fishing.

Fish farming
Main article: Fish farming
Fish farm near Amarynthos Euboea Greece

Fish farming, aquaculture, or pisciculture, has been proposed as a more sustainable alternative or as a supplement to the traditional capture of wild fish.[65] Fish farms are usually located in coastal waters and can involve netpens or cages that are anchored to the sediment at the bottom.[65] As many fisheries have been heavily depleted, farming profitable and commonly consumed fish species is a method used to supply larger quantities of seafood for human consumption.[65] This is especially the case for marine aquatic species such as salmon and shrimp [65] and freshwater species such as carp and tilapia.[66] In fact, approximately 40% of seafood consumed by humans is produced in fish farms.[65]

Even though fish farming does not require a lot of space, they can have significant ecological impacts on the fish around them and marine resources.[65] For instance, low trophic level, wild caught fish like anchovies, capelin and sardines are used to feed marine and freshwater farmed fish.[67] Farmed marine fish species, usually carnivores, tend require more fishmeal and fish oil to thrive.[66] On the opposite end, farmed freshwater fish, usually herbivores and omnivores, are not as dependent on them.[66] This can be problematic because the small fish used for the production of fishmeal also serve as food for predators living outside the enclosures.[65]

It is not uncommon for farmed fish to escape their enclosures.[65][68] This can lead to the introduction of non-native species to a new environment.[68] Farmed species breeding with wild fish species of the same type, called interbreeding, can cause offspring to have reduced fitness.[68]

Marine reserves
Further information: Marine protected area

Marine reserves serve to foster both environmental protection and marine wildlife safety.[69] The reserves themselves are established via environmental protection plans or policies which designate a specific marine environment as protected.[69] Coral reefs are one of the many examples which involve the application of marine reserves in establishing marine protected areas.[69] There have also been marine reserve initiatives located in the United States, Caribbean, Philippines and Egypt.[69] To mitigate the negative environmental impacts of fishing within marine environments, marine reserves are intended to create, enhance and re-introduce biodiversity within the area.[69][70] As a result, the primary benefits arising from the implementation of this type of management effort include positive impacts towards habitat protection and species conservation.[69]

See also

Books:

Related:

References
  1. Frouz, Jan; Frouzová, Jaroslava (2022). Applied Ecology. doi:10.1007/978-3-030-83225-4. ISBN 978-3-030-83224-7. S2CID 245009867.
  2. Food and Agriculture Organization of the United Nations (FAO) (2019). "Fishery and Aquaculture Statistics 2017" (PDF). Archived (PDF) from the original on 2019-10-26.
  3. "Global population growth, wild fish stocks, and the future of aquaculture | Shark Research & Conservation Program (SRC) | University of Miami". sharkresearch.rsmas.miami.edu. Retrieved 2018-04-02.
  4. Laville, Sandra (2019-11-06). "Dumped fishing gear is biggest plastic polluter in ocean, finds report". The Guardian. Retrieved 2022-05-10.
  5. Magazine, Smithsonian; Kindy, David. "With Ropes and Nets, Fishing Fleets Contribute Significantly to Microplastic Pollution". Smithsonian Magazine. Retrieved 2022-05-10.
  6. Worm, Boris; et al. (2006-11-03). "Impacts of Biodiversity Loss on Ocean Ecosystem Services". Science. 314 (5800): 787–790. Bibcode:2006Sci...314..787W. doi:10.1126/science.1132294. PMID 17082450. S2CID 37235806.
  7. Juliet Eilperin (2 November 2006). "Seafood Population Depleted by 2048, Study Finds". The Washington Post.
  8. Michael Clark; Tilman, David (November 2014). "Global diets link environmental sustainability and human health". Nature. 515 (7528): 518–522. Bibcode:2014Natur.515..518T. doi:10.1038/nature13959. ISSN 1476-4687. PMID 25383533. S2CID 4453972.
  9. Erdmann, Pet-Soede, Cabanban (2000). "Destructive Fishing Practices" (PDF). 9th International Coral Reef Symposium.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  10. Major, Robert N.; Taylor, David I.; Connor, Stephen; Connor, Geoffrey; Jeffs, Andrew G. (February 2017). "Factors affecting bycatch in a developing New Zealand scampi potting fishery". Fisheries Research. 186: 55–64. doi:10.1016/j.fishres.2016.08.005.
  11. "Reports". 2017-01-29. Archived from the original on 2006-09-09. Retrieved 2008-02-04.
  12. Pusceddua, Antonio; Bianchellia, Silvia; Martínb, Jacobo; Puigb, Pere; Palanquesb, Albert; Masquéd, Pere; Danovaroa, Roberto (2014). "Chronic and intensive bottom trawling impairs deep-sea biodiversity and ecosystem functioning". Proceedings of the National Academy of Sciences of the United States of America. 111 (24): 8861–8866. Bibcode:2014PNAS..111.8861P. doi:10.1073/pnas.1405454111. ISSN 0027-8424. JSTOR 23802017. PMC 4066481. PMID 24843122.
  13. Blulab. "Destructive Fishing Practices and Bycatch - Ocean Threats | Slow Fish - Local Sustainable Fish". slowfood.com. Archived from the original on 2018-04-03. Retrieved 2018-04-02.
  14. "U.S. vows to work against destructive fishing". msnbc.com. 2006-10-03. Retrieved 2018-04-02.
  15. Jennings, Simon; Kaiser, Michel J. (1998). The effects of fishing on marine ecosystems (PDF). pp. 201–352. doi:10.1016/S0065-2881(08)60212-6. ISBN 9780120261345. {{cite book}}: |journal= ignored (help)
  16. "FAO. Code of Conduct for Responsible Fisheries". www.fao.org. Retrieved 2018-03-30.
  17. Scales, Helen (29 March 2007). "Shark Declines Threaten Shellfish Stocks, Study Says". National Geographic News. Retrieved 1 May 2012.
  18. The State of World Fisheries and Aquaculture 2020. FAO. 2020. doi:10.4060/ca9229en. hdl:10535/3776. ISBN 978-92-5-132692-3. S2CID 242949831.
  19. Daskalov, Georgi M.; Grishin, Alexander N.; Rodionov, Sergei; Mihneva, Vesselina (2007-06-19). "Trophic cascades triggered by overfishing reveal possible mechanisms of ecosystem regime shifts". Proceedings of the National Academy of Sciences. 104 (25): 10518–10523. Bibcode:2007PNAS..10410518D. doi:10.1073/pnas.0701100104. PMC 1965545. PMID 17548831.
  20. Cooke, Steven J.; Suski, Cory D. (2005-05-01). "Do we need species-specific guidelines for catch-and-release recreational angling to effectively conserve diverse fishery resources?". Biodiversity & Conservation. 14 (5): 1195–1209. doi:10.1007/s10531-004-7845-0. ISSN 0960-3115. S2CID 16894387.
  21. Daskalov, Georgi M. (2002). "Overfishing drives a trophic cascade in the Black Sea". Marine Ecology Progress Series. 225: 53–63. Bibcode:2002MEPS..225...53D. doi:10.3354/meps225053. ISSN 0171-8630.
  22. Coleman, Felicia C.; Williams, Susan L. (2002). "Overexploiting marine ecosystem engineers: potential consequences for biodiversity". Trends in Ecology & Evolution. 17 (1): 40–44. doi:10.1016/s0169-5347(01)02330-8.
  23. Cury, Bakun, Crawford, Jarre, Quinones, Shannon, Verheye (2000). "Small pelagics in upwelling systems: patterns of interaction and structural changes in wasp-waist ecosystems". ICES Journal of Marine Science. 57 (3): 603–618. doi:10.1006/jmsc.2000.0712.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  24. Harvey, Fiona (2019-12-04). "Tackling degraded oceans could mitigate climate crisis - report". The Guardian. ISSN 0261-3077. Retrieved 2019-12-07.
  25. Sala, Enric; Mayorga, Juan; Bradley, Darcy; Cabral, Reniel B.; Atwood, Trisha B.; Auber, Arnaud; Cheung, William; Costello, Christopher; Ferretti, Francesco; Friedlander, Alan M.; Gaines, Steven D.; Garilao, Cristina; Goodell, Whitney; Halpern, Benjamin S.; Hinson, Audra (2021-03-17). "Protecting the global ocean for biodiversity, food and climate". Nature. 592 (7854): 397–402. Bibcode:2021Natur.592..397S. doi:10.1038/s41586-021-03371-z. ISSN 1476-4687. PMID 33731930. S2CID 232301777.
  26. Mariani, Gaël; Cheung, William W. L.; Lyet, Arnaud; Sala, Enric; Mayorga, Juan; Velez, Laure; Gaines, Steven D.; Dejean, Tony; Troussellier, Marc; Mouillot, David (2020-10-30). "Let more big fish sink: Fisheries prevent blue carbon sequestration—half in unprofitable areas". Science Advances. 6 (44): eabb4848. Bibcode:2020SciA....6.4848M. doi:10.1126/sciadv.abb4848. ISSN 2375-2548. PMC 7608781. PMID 33115738.
  27. "Seafloor Protection". Project Drawdown. 2022-04-25. Retrieved 2022-09-02.
  28. McVeigh, Karen (2021-03-17). "Bottom trawling releases as much carbon as air travel, landmark study finds". The Guardian. Retrieved 2022-09-02.
  29. Suuronen, Petri; Chopin, Francis; Glass, Christopher; Løkkeborg, Svein; Matsushita, Yoshiki; Queirolo, Dante; Rihan, Dominic (May 2012). "Low impact and fuel efficient fishing—Looking beyond the horizon". Fisheries Research. 119–120: 135–146. doi:10.1016/j.fishres.2011.12.009.
  30. "Discards and bycatch in Shrimp trawl fisheries". www.fao.org. Retrieved 2019-08-30.
  31. Keledjian, Amanda. "WASTED CATCH: UNSOLVED PROBLEMS IN U.S. FISHERIES" (PDF).
  32. Goldenberg, Suzanne (2014-03-20). "America's nine most wasteful fisheries named". The Guardian. ISSN 0261-3077. Retrieved 2019-08-30.
  33. Schindler, D.E., Essington, T.E., Kitchell, J.F., Boggs, C. and Hilborn, R. (2002) http://onlinelibrary.wiley.com/wol1/doi/10.1890/1051-0761(2002)012%5B0735:SATFIO%5D2.0.CO;2/abstract "Sharks and tunas: fisheries impacts on predators with contrasting life histories". Ecological Applications, 12 (3): 735–748. doi:10.1890/1051-0761(2002)012[0735:SATFIO]2.0.CO;2
  34. Spiegel, J. (2000) http://heinonline.org/HOL/LandingPage?handle=hein.journals/bcic24&div=22&id=&page= "Even Jaws deserves to keep his fins: outlawing shark finning throughout global waters". Boston College International and Comparative Law Review, 24 (2): 409–438.
  35. Urbina, Ian (2016). "Palau vs. Poachers, The New York Times". The New York Times.
  36. https://www.livescience.com/1027-shark-slaughter-73-million-killed-year.html Shark Slaughter: 73 Million Killed Each Year. Ker Than. September 26, 2006. Retrieved January 1, 2019.
  37. https://ocean.si.edu/ocean-life/sharks-rays/shark-finning-sharks-turned-prey Ocean.si.edu. Shark finning: Sharks turned prey. Caty Fairclough. Retrieved January 1, 2019.
  38. http://www.abc.net.au/news/2013-12-22/can-governments-protect-people-from-killer-sharks/5158880 "Can governments protect people from killer sharks?". ABC News. 2013-12-22. Retrieved January 1, 2019.
  39. http://pursuit.unimelb.edu.au/articles/sharks-how-a-cull-could-ruin-an-ecosystem Schetzer, Alana. "Sharks: How a cull could ruin an ecosystem". puruit.unimelb.edu.au. Retrieved January 1, 2019.
  40. https://web.archive.org/web/20181002102324/https://www.marineconservation.org.au/pages/shark-culling.html "Shark Culling". marineconservation.org.au. Archived from the original on 2018-10-02. Retrieved January 1, 2019.
  41. http://www.sharkangels.org/index.php/media/news/157-shark-nets Archived 2018-09-19 at the Wayback Machine "Shark Nets". sharkangels.org. Archived from the original on 2018-09-19. Retrieved January 1, 2019.
  42. https://www.nzherald.co.nz/world/news/article.cfm?c_id=2&objectid=11847758 "Man Who Devoted Life To Sharks, Killed Off The Coast Of Reunion". nzherald.co.nz. April 30, 2017. Retrieved January 1, 2019.
  43. https://www.news.com.au/technology/science/animals/aussie-shark-population-is-staggering-decline/news-story/49e910c828b6e2b735d1c68e6b2c956e Aussie shark population in staggering decline. Rhian Deutrom. December 14, 2018. Retrieved January 1, 2018.
  44. http://www.afd.org.au/news-articles/queenslands-shark-control-program-has-snagged-84000-animals Action for Dolphins. Queensland’s Shark Control Program Has Snagged 84,000 Animals. Thom Mitchell. November 20, 2015. Retrieved January 1, 2019.
  45. https://www.ntd.tv/2018/09/04/video-endangered-hammerhead-sharks-dead-on-drum-line-in-great-barrier-reef/ Archived 2018-09-19 at the Wayback Machine Phillips, Jack (September 4, 2018). "Video: Endangered Hammerhead Sharks Dead on Drum Line in Great Barrier Reef". ntd.tv. Retrieved January 1, 2019.
  46. Eriksen, Marcus; Lebreton, Laurent C. M.; Carson, Henry S.; Thiel, Martin; Moore, Charles J.; Borerro, Jose C.; Galgani, Francois; Ryan, Peter G.; Reisser, Julia (2014-12-10). "Plastic Pollution in the World's Oceans: More than 5 Trillion Plastic Pieces Weighing over 250,000 Tons Afloat at Sea". PLOS ONE. 9 (12): e111913. Bibcode:2014PLoSO...9k1913E. doi:10.1371/journal.pone.0111913. PMC 4262196. PMID 25494041.
  47. Lebreton, L.; Slat, B.; Ferrari, F.; Sainte-Rose, B.; et al. (2018-03-22). "Evidence that the Great Pacific Garbage Patch is rapidly accumulating plastic". Scientific Reports. 8 (1): 4666. Bibcode:2018NatSR...8.4666L. doi:10.1038/s41598-018-22939-w. PMC 5864935. PMID 29568057.
  48. Jang, Yong Chang; Lee, Jongmyoung; Hong, Sunwook; Lee, Jong Su; Shim, Won Joon; Song, Young Kyoung (2014-07-06). "Sources of plastic marine debris on beaches of Korea: More from the ocean than the land". Ocean Science Journal. 49 (2): 151–162. Bibcode:2014OSJ....49..151J. doi:10.1007/s12601-014-0015-8. ISSN 1738-5261. S2CID 85429593.
  49. Laist, David W. (1997). "Impacts of Marine Debris: Entanglement of Marine Life in Marine Debris Including a Comprehensive List of Species with Entanglement and Ingestion Records". In Coe, James M.; Rogers, Donald (eds.). Marine Debris. Springer Series on Environmental Management. New York, NY: Springer. pp. 99–139. doi:10.1007/978-1-4613-8486-1_10. ISBN 9781461384885.
  50. Sigler, Michelle (2014-11-01). "The Effects of Plastic Pollution on Aquatic Wildlife: Current Situations and Future Solutions" (PDF). Water, Air, & Soil Pollution. 225 (11): 2184. Bibcode:2014WASP..225.2184S. doi:10.1007/s11270-014-2184-6. ISSN 0049-6979. S2CID 51944658.
  51. Matsuoka, Tatsuro; Nakashima, Toshiko; Nagasawa, Naoki (2005-07-01). "A review of ghost fishing: scientific approaches to evaluation and solutions" (PDF). Fisheries Science. 71 (4): 691. doi:10.1111/j.1444-2906.2005.01019.x. ISSN 0919-9268. S2CID 6539536.
  52. Gregory, Murray R. (2009-07-27). "Environmental implications of plastic debris in marine settings—entanglement, ingestion, smothering, hangers-on, hitch-hiking and alien invasions". Philosophical Transactions of the Royal Society of London B: Biological Sciences. 364 (1526): 2013–2025. doi:10.1098/rstb.2008.0265. ISSN 0962-8436. PMC 2873013. PMID 19528053.
  53. J., Cooke, Steven; G., Cowx, Ian (2004-09-01). "The Role of Recreational Fishing in Global Fish Crises". BioScience. 54 (9): 857. doi:10.1641/0006-3568(2004)054[0857:TRORFI]2.0.CO;2. ISSN 0006-3568.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  54. "Study In Science Reveals Recreational Fishing Takes Big Bite Of Ocean Catch". ScienceDaily. Retrieved 2018-04-02.
  55. Joshua K. Abbott, Patrick Lloyd-Smith, Daniel Willard, and Wiktor Adamowicz (September 4, 2018). "Status-quo management of marine recreational fisheries undermines angler welfare". PNAS. 115 (36): 8948–8953. Bibcode:2018PNAS..115.8948A. doi:10.1073/pnas.1809549115. PMC 6130401. PMID 30127021.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  56. Bartholomew, Aaron; Bohnsack, James A. (2005-02-01). "A Review of Catch-and-Release Angling Mortality with Implications for No-take Reserves". Reviews in Fish Biology and Fisheries. 15 (1): 129–154. doi:10.1007/s11160-005-2175-1. ISSN 1573-5184. S2CID 2323279.
  57. Donaldson, Michael R.; Arlinghaus, Robert; Hanson, Kyle C.; Cooke, Steven J. (2008-03-01). "Enhancing catch-and-release science with biotelemetry". Fish and Fisheries. 9 (1): 79–105. CiteSeerX 10.1.1.589.1499. doi:10.1111/j.1467-2979.2007.00265.x. ISSN 1467-2979.
  58. Costello, Christopher; Gaines, Steven D and Lynham, John (2008) Can Catch Shares Prevent Fisheries Collapse? Science Vol 321, No 5896, pp 1678–1681.
  59. Hilborn, Ray; Ovando, Daniel (2014-08-01). "Reflections on the success of traditional fisheries management". ICES Journal of Marine Science. 71 (5): 1040–1046. doi:10.1093/icesjms/fsu034. ISSN 1054-3139.
  60. Worm, Boris; Hilborn, Ray; Baum, Julia K.; Branch, Trevor A.; Collie, Jeremy S.; Costello, Christopher; Fogarty, Michael J.; Fulton, Elizabeth A.; Hutchings, Jeffrey A.; Jennings, Simon; Jensen, Olaf P.; Lotze, Heike K.; Mace, Pamela M.; McClanahan, Tim R.; Minto, Cóilín (2009-07-31). "Rebuilding Global Fisheries". Science. 325 (5940): 578–585. Bibcode:2009Sci...325..578W. doi:10.1126/science.1173146. ISSN 0036-8075. PMID 19644114. S2CID 2805799.
  61. Pikitch, Ellen K. (2012-10-26). "The Risks of Overfishing". Science. 338 (6106): 474–475. Bibcode:2012Sci...338..474P. doi:10.1126/science.1229965. ISSN 0036-8075. PMID 23112316. S2CID 206545165.
  62. Worm, Boris; Hilborn, Ray; Baum, Julia K.; Branch, Trevor A.; Collie, Jeremy S.; Costello, Christopher; Fogarty, Michael J.; Fulton, Elizabeth A.; Hutchings, Jeffrey A.; Jennings, Simon; Jensen, Olaf P.; Lotze, Heike K.; Mace, Pamela M.; McClanahan, Tim R.; Minto, Cóilín (2009-07-31). "Rebuilding Global Fisheries". Science. 325 (5940): 578–585. Bibcode:2009Sci...325..578W. doi:10.1126/science.1173146. ISSN 0036-8075. PMID 19644114. S2CID 2805799.
  63. Lenihan, Hunter S.; Peterson, Charles H. (2004). "How Habitat Degradation Through Fishery Disturbance Enhances Impacts of Hypoxia on Oyster Reefs". Fishery Bulletin. 102 (2): 298. doi:10.1890/1051-0761(1998)008[0128:hhdtfd]2.0.co;2. ISSN 1051-0761.
  64. Watson, John W; Epperly, Sheryan P; Shah, Arvind K; Foster, Daniel G (2005-05-01). "Fishing methods to reduce sea turtle mortality associated with pelagic longlines". Canadian Journal of Fisheries and Aquatic Sciences. 62 (5): 965–981. doi:10.1139/f05-004. ISSN 0706-652X.
  65. Goldburg, Rebecca; Naylor, Rosamond (February 2005). "Future seascapes, fishing, and fish farming". Frontiers in Ecology and the Environment. 3 (1): 21–28. doi:10.1890/1540-9295(2005)003[0021:fsfaff]2.0.co;2. ISSN 1540-9295.
  66. Naylor, Rosamond L.; Goldburg, Rebecca J.; Primavera, Jurgenne H.; Kautsky, Nils; Beveridge, Malcolm C. M.; Clay, Jason; Folke, Carl; Lubchenco, Jane; Mooney, Harold; Troell, Max (June 2000). "Effect of aquaculture on world fish supplies". Nature. 405 (6790): 1017–1024. Bibcode:2000Natur.405.1017N. doi:10.1038/35016500. ISSN 0028-0836. PMID 10890435. S2CID 4411053.
  67. Tacon, AGJ (April 2003). "Sustainable aquaculture feeds: an overview and global perspective". SEAfeeds Workshop. Stirling, Scotland, UK.
  68. McGinnity, Philip; Prodöhl, Paulo; Ferguson, Andy; Hynes, Rosaleen; Maoiléidigh, Niall ó; Baker, Natalie; Cotter, Deirdre; O'Hea, Brendan; Cooke, Declan; Rogan, Ger; Taggart, John; Cross, Tom (2003-12-07). "Fitness reduction and potential extinction of wild populations of Atlantic salmon,Salmo salar, as a result of interactions with escaped farm salmon". Proceedings of the Royal Society of London. Series B: Biological Sciences. 270 (1532): 2443–2450. doi:10.1098/rspb.2003.2520. ISSN 0962-8452. PMC 1691531. PMID 14667333.
  69. Roberts, Callum M.; Polunin, Nicholas V. C. (1993). "Marine Reserves: Simple Solutions to Managing Complex Fisheries?". Ambio. 22 (6): 363–368. JSTOR 4314106.
  70. Aburto-Oropeza, Octavio; Erisman, Brad; Galland, Grantly R.; Mascareñas-Osorio, Ismael; Sala, Enric; Ezcurra, Exequiel (2011-08-12). "Large Recovery of Fish Biomass in a No-Take Marine Reserve". PLOS ONE. 6 (8): e23601. Bibcode:2011PLoSO...623601A. doi:10.1371/journal.pone.0023601. ISSN 1932-6203. PMC 3155316. PMID 21858183.

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