Misplaced Pages

Bycatch (or by-catch), in the fishing industry, is a fish or other marine species that is caught unintentionally while fishing for specific species or sizes of wildlife. Bycatch is either the wrong species, the wrong sex, or is undersized or juveniles of the target species. The term "bycatch" is also sometimes used for untargeted catch in other forms of animal harvesting or collecting. Non-marine species (freshwater fish not saltwater fish) that are caught (either intentionally or unintentionally) but regarded as generally "undesirable" are referred to as rough fish (mainly US) or coarse fish (mainly UK).

In 1997, the Organisation for Economic Co-operation and Development (OECD) defined bycatch as "total fishing mortality, excluding that accounted directly by the retained catch of target species". Bycatch contributes to fishery decline and is a mechanism of overfishing for unintentional catch.

The average annual bycatch rate of pinnipeds and cetaceans in the US from 1990 to 1999 was estimated at 6215 animals with a standard error of 448.

Bycatch issues originated with the "mortality of dolphins in tuna nets in the 1960s".

There are at least four different ways the word "bycatch" is used in fisheries:

• Catch which is retained and sold but which is not the target species for the fishery
• Species/sizes/sexes of fish which fishers discard
• Non-target fish, whether retained and sold or discarded
• Unwanted invertebrate species, such as echinoderms and non-commercial crustaceans, and various vulnerable species groups, including seabirds, sea turtles, marine mammals and elasmobranchs (sharks and their relatives).

Additionally, the term "deliberate bycatch" is used to refer to bycatch as a source of illegal wildlife trade (IWT) in several areas throughout world.

There are several tools to estimate bycatch limits—the maximum number of animals that could be sustainably removed from a population impacted by bycatch. These include the 'potential biological removal' (PBR) and the 'sustainable anthropogenic mortality in stochastic environments' (SAMSE), which incorporates stochastic factors to determine sustainable limits to bycatch and other human-caused mortality of wildlife.

Examples

Recreational fishing

Given the popularity of recreational fishing throughout the world, a small local study in the US in 2013 suggested that discards may be an important unmonitored source of fish mortality.

Shrimp trawling

The highest rates of incidental catch of non-target species are associated with tropical shrimp trawling. In 1997, the Food and Agriculture Organization of the United Nations (FAO) documented the estimated bycatch and discard levels from shrimp fisheries around the world. They found discard rates (bycatch to catch ratios) as high as 20:1 with a world average of 5.7:1.

Shrimp trawl fisheries catch two percent of the world total catch of all fish by weight, but produce more than one-third of the world total bycatch. US shrimp trawlers produce bycatch ratios between 3:1 (3 bycatch:1 shrimp) and 15:1 (15 bycatch:1 shrimp).

Trawl nets in general, and shrimp trawls in particular, have been identified as sources of mortality for cetacean and finfish species. When bycatch is discarded (returned to the sea), it is often dead or dying.

Tropical shrimp trawlers often make trips of several months without coming to port. A typical haul may last four hours after which the net is pulled in. Just before it is pulled on board the net is washed by zigzagging at full speed. The contents are then dumped on deck and are sorted. An average of 5.7:1 means that for every kilogram of shrimp there are 5.7 kg of bycatch. In tropical inshore waters the bycatch usually consists of small fish. The shrimps are frozen and stored on board; the bycatch is discarded.

Recent sampling in the South Atlantic rock shrimp fishery found 166 species of finfish, 37 crustacean species, and 29 other species of invertebrate among the bycatch in the trawls. Another sampling of the same fishery over a two-year period found that rock shrimp amounted to only 10% of total catch weight. Iridescent swimming crab, dusky flounder, inshore lizardfish, spot, brown shrimp, longspine swimming crabs, and other bycatch made up the rest.

Despite the use of bycatch reduction devices, the shrimp fishery in the Gulf of Mexico removes about 25–45 million red snapper annually as bycatch, nearly one-half the amount taken in recreational and commercial snapper fisheries.

Cetacean

Cetaceans, such as dolphins, porpoises, and whales, can be seriously affected by entanglement in fishing nets and lines, or direct capture by hooks or in trawl nets. Cetacean bycatch is increasing in intensity and frequency. In some fisheries, cetaceans are captured as bycatch but then retained because of their value as food or bait. In this fashion, cetaceans can become a target of fisheries.

One example of bycatch is dolphins caught in tuna nets. As dolphins are mammals and do not have gills, they may drown while stuck in nets underwater. This bycatch issue has been one of the reasons of the growing ecolabelling industry, where fish producers mark their packagings with disclaimers such as "dolphin friendly" to reassure buyers. However, "dolphin friendly" does not mean that dolphins were not killed in the production of a particular tin of tuna, but that the fleet which caught the tuna did not specifically target a feeding pod of dolphins, but relied on other methods to spot tuna schools. The bycatch of the Caspian seal may be recognized as one of the biggest entanglements of pinnipeds as bycatch in the world

Albatross

Of the 22 albatross species recognised by IUCN on their Red List, 15 are threatened with extinction, six species are considered as Near Threatened, and only one of Least Concern. Two species, the Tristan albatross and the waved albatross, are considered as Critically Endangered. One of the main threats is commercial longline fishing, because albatrosses and other seabirds which readily feed on offal are attracted to the set bait, after which they become hooked on the lines and drown. An estimated 100,000 albatross per year are killed in this fashion. Unregulated pirate fisheries exacerbate the problem.

A research study examined the impact of illegal longline fishing vessels on albatrosses, by using environmental criminology as a guiding theoretical framework. The results indicated that potentially illegal longline fishing activities are highly concentrated in areas of illegally-caught fish species, and the risk to bycatch albatrosses is significantly higher in areas where these illegal longline fishing vessels operate. These findings provide strong grounding that illegal longline fishing poses a particularly serious threat to the survival of seabirds.

Sea turtles

Sea turtles, already critically endangered, have been killed in large numbers in shrimp trawl nets. Estimates indicate that thousands of Kemp's ridley, loggerhead, green, and leatherback sea turtles are caught in shrimp trawl fisheries in the Gulf of Mexico and the US Atlantic annually The speed and length of the trawl method is significant because, "for a tow duration of less than 10 minutes, the mortality rate for sea turtles is less than one percent, whereas for tows greater than sixty minutes the mortality rate rapidly increases to fifty to one hundred percent".

Sea turtles can sometimes escape from the trawls. In the Gulf of Mexico, the Kemp's ridley turtles recorded most interactions, followed in order by loggerhead, green, and leatherback sea turtles. In the US Atlantic, the interactions were greatest for loggerheads, followed in order by Kemp's ridley, leatherback, and green sea turtles.

Fishing gear

Bycatch is inevitable wherever there is fishing. The incidental catch is not limited to only fish species: dolphins, sea turtles, and seabirds are also victims of bycatch. Longlines, trawls and purse seine nets are driving factors in the endangerment of no fewer than fifteen shark species. Bycatch may also affect reproduction of populations as juveniles are also victims of bycatch. Bycatch happens most commonly with the use of gillnetting, longlines, or bottom trawling. Longlines with bait hook attachments can potentially reach lengths of dozens of kilometres, and, along with gill nets in the water and bottom trawls sweeping the sea floor, can catch essentially everything in their path. There are thousands of kilometres of nets and lines cast into the world's oceans daily. This modern fish gear is robust and invisible to the eye, making it efficient at catching fish and bycatching everything that happens to be in the way. Hook-and-line fishing could limit bycatch to a certain extent as the non-target animals can be released back to the ocean fairly quickly.

Mitigation

Concern about bycatch has led fishers and scientists to seek ways of reducing unwanted catch. There are two main approaches.

One approach is to ban fishing in areas where bycatch is unacceptably high. Such area closures can be permanent, seasonal, or for a specific period when a bycatch problem is registered. Temporary area closures are common in some bottom trawl fisheries where undersized fish or non-target species are caught unpredictably. In some cases fishers are required to relocate when a bycatch problem occurs.

The other approach is alternative fishing gear. A technically simple solution is to use nets with a larger mesh size, allowing smaller species and smaller individuals to escape. However, this usually requires replacing the existing gear. In some cases, it is possible to modify gear. Bycatch reduction devices (BRDs) and the Nordmore grate are net modifications that help fish escape from shrimp nets.

Bycatch reduction devices

BRDs allow many commercial finfish species to escape. The US government has approved BRDs that reduce finfish bycatch by 30%. Spanish mackerel and weakfish bycatch in the South Atlantic was reduced by 40%. However, recent surveys suggest BRDs may be less effective than previously thought. A rock shrimp fishery off Florida found the devices failed to exclude 166 species of fish, 37 crustacean species, and 29 species of other invertebrates.

A pulsed electric field-based shark and ray bycatch mitigation device, SharkGuard, was reported by 2022 study to have reduced bycatch of blue shark by 91% and of stingrays by 71% with commercial fishing gear in a French longline tuna fishery in the Mediterranean.

Turtle excluder devices

In 1978, the National Marine Fisheries Service (NMFS) started to develop turtle excluder devices (TED). A TED uses a grid which deflects turtles and other big animals, so they exit from the trawl net through an opening above the grid. US shrimp trawlers and foreign fleets which market shrimp in the US are required to use TEDs. Not all nations enforce the use of TEDs.

For the most part, when they are used, TEDs have been successful reducing sea turtle bycatch. However, they are not completely effective, and some turtles are still captured. NMFS certifies TED designs if they are 97% effective. In heavily trawled areas, the same sea turtle may pass repeatedly through TEDs. Recent studies indicate recapture rates of 20% or more, but it is not clear how many turtles survive the escape process.

Conservation engineering of trawl nets

The size selectivity of trawl nets is controlled by the size of the net openings, especially in the "cod end". The larger the openings, the more easily small fish can escape. The development and testing of modifications to fishing gear to improve selectivity and decrease impact is called "conservation engineering".

Longline fishing is controversial in some areas because of bycatch. Mitigation methods have been successfully implemented in some fisheries. These include:

• weights to sink the lines quickly
• streamer lines to scare birds away from baited hooks while deploying the lines
• setting lines only at night with minimal ship lighting (to avoid attracting birds)
• limiting fishing seasons to the southern winter (when most seabirds are not feeding young)
• not discharging offal while setting lines.

However, gear modifications do not eliminate bycatch of many species. In March 2006, the Hawaiʻi longline swordfish fishing season was closed due to excessive loggerhead sea turtle bycatch after being open only a few months, despite using modified circle hooks.

No discards policy

One solution that Norway came up with to reduce bycatch is to adopt a 'no discards' policy. This means that the fishermen must keep everything they catch. This policy has helped to "encourage bycatch research", which, in turn has helped "encourage behavioral changes in fishers" and "reduce the waste of life" as well.

Seabirds

Seabirds get entangled in longlines by flocking around vessels, this eventually leads to drowning because they try to catch baits on the hooks. Fisheries had been using "streamer lines" as a cost effective solution to mitigate this type of bycatch, and it has dramatically reduced seabird mortality. These streamer lines have bright colors and are made of polyester rope, they are positioned alongside the longlines on both sides. Their bright colors and constantly flapping of water frightens the seabirds and they fly away before reaching the baited hooks. A successful example would be the use of streamer lines in Alaskan groundfish longline fisheries, as the deaths of seabirds declined by about 70% after the deployment of these lines.

Alternative to discarding

Some fisheries retain bycatch, rather than throwing the fish back into the ocean. Sometimes bycatch is sorted and sold as food, especially in Asia, Africa and Latin America, where cost of labour is cheaper. Bycatch can also be sold in frozen bags as "assorted seafood" or "seafood medley" at cheaper prices. Bycatch can be converted into fish hydrolysate (ground up fish carcasses) for use as a soil amendment in organic agriculture or it can be used as an ingredient in fish meal. In Southeast Asia bycatch is sometimes used as a raw material for fish sauce production. Bycatch is also commonly de-boned, de-shelled, ground and blended into fish paste or moulded into fish cakes (surimi) and sold either fresh (for domestic use) or frozen (for export). This is commonly the case in Asia or by Asian fisheries. Sometimes bycatch is sold to fish farms to feed farmed fish, especially in Asia.

Non-fisheries bycatch

The term "bycatch" is used also in contexts other than fisheries. Examples are insect collecting with pitfall traps or flight interception traps for either financial, controlling or scientific purposes (where the bycatch may either be small vertebrates or untargeted insects) and control of introduced vertebrates which have become pest species like the muskrat in Europe (where the bycatch in traps may be European minks or waterfowl).

See also

• Environmental stewardship
• Discards
• Cetacean bycatch
• List of environmental issues
• Shrimp turtle case
• Ghost net

References

1. OECD (1997) Towards sustainable fisheries: economic aspects of the management of living marine resources. OECD Paris.
2. C. Michael Hogan. 2010. Overfishing. Encyclopedia of Earth. National Council for Science and the Environment. eds. Sidney Draggan and C. Cleveland. Washington DC.
3. Read, Andrew J.; Drinker, Phebe; Northridge, Simon (February 2006). "Bycatch of Marine Mammals in U.S. and Global Fisheries". Conservation Biology. 20 (1): 163–169. Bibcode:2006ConBi..20..163R. doi:10.1111/j.1523-1739.2006.00338.x. PMID 16909669. S2CID 157350.
4. ^ Hall, M; Alverson, DL; Metuzals, KI (2000). "By-catch: problems and solutions". Marine Pollution Bulletin. 41 (1–6): 204–219. Bibcode:2000MarPB..41..204H. doi:10.1016/S0025-326X(00)00111-9.
5. Alverson D L; Freeberg M K; Murawski S A; Pope J G (1994). A global assessment of fisheries bycatch and discards. Rome: FAO.
6. A definition used particularly in the northeast and western Pacific and in US legislation
7. Hall, M A (1996). "On bycatches". Reviews in Fish Biology and Fisheries. 6 (3): 319–352. Bibcode:1996RFBF....6..319H. doi:10.1007/BF00122585. S2CID 25760363.
8. Ermolin, Ilya; Svolkinas, Linas (January 2018). "Assessment of the sturgeon catches and seal bycatches in an IUU fishery in the Caspian Sea". Marine Policy. 87 (87): 284–290. doi:10.1016/j.marpol.2017.09.022.
9. Manlik, Oliver; Lacy, Robert C.; Sherwin, William B.; Finn, Hugh; Loneragan, Neil; Allen, Simon C. (2022). "A stochastic model for estimating sustainable limits to wildlife mortality in a changing world". Conservation Biology. 36 (4): e13897. Bibcode:2022ConBi..36E3897M. doi:10.1111/cobi.13897. PMC 9542519. PMID 35122329.
10. McCallum, Malcolm L.; Worley, Gina M.; Safi, Barroq; Dickens, Kris; Jones, Jason; McCallum, Jamie L. "By-catch in a recreational fishery: An unmonitored source of mortality". PeerJ Preprints. doi:10.7287/peerj.preprints.120v1.
11. Clucas, Ivor (1997). Discards and bycatch in shrimp trawl fisheries. FAO Fisheries Circular.
12. ^ SAFMC (2004)
13. Morgan, LE; Chuenpagdee, R (2003). Shifting Gears. Addressing the Collateral Impacts of Fishing Methods in U.S. Waters.
14. Clucas, I.; Teutscher, F., eds. (1999). FAO/DFID Expert Consultation on Bycatch Utilization in Tropical Fisheries. Beijing (China), 21–28 September 1998. University of Greenwich, NRI. p. 333. ISBN 978-0-85954-504-4.
15. ^ Gulf of Mexico Fishery Management Council (GMFMC) (2006) Scoping Document for Amendment 15 to the Shrimp FMP Archived 2008-12-17 at the Wayback Machine
16. Gulf of Mexico Red Snapper: Assessment Summary Report (PDF). Southeast Data, Assessment, and Review (SEDAR) Stock Assessment Report of SEDAR. 2005.
17. Demaster, DJ; Fowler, CW; Perry, SL; Richlen, ME (2001). "Predation and competition: the impact of fisheries on marine mammal populations over the next one hundred years". Journal of Mammalogy. 82 (3): 641–651. doi:10.1644/1545-1542(2001)082<0641:PACTIO>2.0.CO;2.
18. Read AJ, Drinker P, Northridge S (2006). "Bycatch of marine mammals in the U.S. and global fisheries". Conservation Biology. 20 (1): 163–169. Bibcode:2006ConBi..20..163R. doi:10.1111/j.1523-1739.2006.00338.x. PMID 16909669. S2CID 157350.
19. Dmitrieva, Lilia; Kondakov, Andrey A.; Oleynikov, Eugeny; Kydyrmanov, Aidyn; Karamendin, Kobey; Kasimbekov, Yesbol; Baimukanov, Mirgaliy; Wilson, Susan; Goodman, Simon J. (2013). "Assessment of Caspian Seal By-Catch in an Illegal Fishery Using an Interview-Based Approach". PLOS ONE. 8 (6): e67074. Bibcode:2013PLoSO...867074D. doi:10.1371/journal.pone.0067074. PMC 3694144. PMID 23840590.
20. Ermolin, Ilya; Svolkinas, Linas (2018). "Assessment of the sturgeon catches and seal bycatches in an IUU fishery in the Caspian Sea" (PDF). Marine Policy. 87: 284–290. doi:10.1016/j.marpol.2017.09.022.
21. ^ "BirdLife Data Zone". datazone.birdlife.org. Retrieved 2022-12-28.
22. Brothers NP (1991). "Albatross mortality and associated bait loss in the Japanese longline fishery in the southern ocean". Biological Conservation. 55 (3): 255–268. Bibcode:1991BCons..55..255B. doi:10.1016/0006-3207(91)90031-4.
23. ^ Petrossian, Gohar A.; Pires, Stephen F.; Sosnowski, Monique; Venu, Prabha; Olah, George (2022). "Threats of Longline Fishing to Global Albatross Diversity". Animals. 12 (7): 887. doi:10.3390/ani12070887. ISSN 2076-2615. PMC 8997039. PMID 35405876.  This article incorporates text from this source, which is available under the CC BY 4.0 license.
24. ^ Epperly, S; Avens, L; Garrison, L; Henwood, T; Hoggard, W; Mitchell, J; Nance, J; Poffenberger, J; Sasso, C; Scott-Denton, E and; Young, C (2002). "Analysis of Sea Turtle Bycatch in the Commercial Shrimp Fisheries of Southeast US Waters and the Gulf of Mexico" (PDF). NOAA Technical Memorandum NMFS-SEFSC-490. Archived from the original (PDF) on 2009-05-09. Retrieved 20 December 2009.
25. Nada, Mohamed; Casale, Paolo (2011). "Sea turtle bycatch and consumption in Egypt threatens Mediterranean turtle populations". Oryx. 45: 143–149. doi:10.1017/S0030605310001286.
26. ^ "Effects of Bycatch from Fishing for Wild Seafood from the Seafood Watch Program at the Monterey Bay Aquarium". www.seafoodwatch.org.
27. "Bycatch - Threats". World Wildlife Fund.
28. Campaign for Eco-Safe Tuna Retrieved 2.21.2012
29. "New gadget could reduce shark bycatch by 90%". The Guardian. 21 November 2022. Retrieved 18 December 2022.
30. Doherty, Philip D.; Enever, Robert; Omeyer, Lucy C. M.; Tivenan, Lydia; Course, Grant; Pasco, Guy; Thomas, David; Sullivan, Ben; Kibel, Ben; Kibel, Pete; Godley, Brendan J. (21 November 2022). "Efficacy of a novel shark bycatch mitigation device in a tuna longline fishery". Current Biology. 32 (22): R1260 – R1261. Bibcode:2022CBio...32R1260D. doi:10.1016/j.cub.2022.09.003. hdl:10871/132022. ISSN 0960-9822. PMID 36413965.
31. "Final Amendment Number 13 to the Fishery Management Plan for the Shrimp Fishery of the Gulf of Mexico" (PDF). US Waters with Environmental Assessment Regulatory Impact Review, and Regulatory Flexibility Act Analysis. 2005.
32. Crowder, 2001
33. ^ Gullestad, P.; Blom, G.; Bakke, G.; Bogstad, B. (2015-04-01). "The "Discard Ban Package": Experiences in efforts to improve the exploitation patterns in Norwegian fisheries". Marine Policy. 54: 1–9. doi:10.1016/j.marpol.2014.09.025. hdl:11250/273853. ISSN 0308-597X.
34. Engelhardt, Elizabeth, "An Oyster by Any Other Name", Southern Spaces, 18 April 2011
35. "Bycatch, ethics and pitfall traps". Journal of Insect Conservation. 3 (1): 1–3. 1999. doi:10.1023/A:1017191920328. S2CID 264021128.
36. Kranz A, Polednik L and Gotea V (2001) Conservation of the European Mink (Mustella lutreila) in the Danube Delta Archived 2011-09-29 at the Wayback Machine Background information and project plan. Scientific Annals of the Danube Delta Institute for Research and Development, Tulcea, 2000–2001.

Further reading

• FAO (2009) Technical Guidelines for Responsible Fisheries, Number 1: Fishing operations, supplement 2 Best practices to reduce incidental catch of seabirds in capture fisheries Rome. ISBN 978-92-5-106423-8.
• FAO (1997) A STUDY OF THE OPTIONS FOR UTILIZATION OF BYCATCH AND DISCARDS FROM MARINE CAPTURE FISHERIES A STUDY OF THE OPTIONS FOR UTILIZATION...
• Karp WA, Desfosse LL and Brooke SG (2011) U.S. National Bycatch Report Archived 2018-01-11 at the Wayback Machine National Marine Fisheries Service, NOAA Technical Memo NMFS-F/SPO-117E.
• SAFMC (1998) Final Habitat Plan for the South Atlantic Region Essential Fish Habitat Requirements for Fishery. Management Plans of the South Atlantic Fishery Management Council. The Shrimp Fishery Management Plan (FMP), the Red Drum FMP, the Snapper Grouper FMP, the Coastal Migratory Pelagics FMP, the Golden Crab FMP, the Spiny Lobster FMP, the Coral, Coral Reefs, and Live/Hard Bottom Habitat FMP, the Sargassum Habitat FMP, and the Calico Scallop FMP.
• U.S. Shrimp (South Atlantic and Gulf of Mexico) – Blue Ocean Institute. Retrieved 22 March 2008.

External links

• Mitigating Adverse Ecological impacts of open oceanfisheries – European project MADE (28 minute film)
• Bycatch – Smithsonian Ocean Portal
• Bycatch Management Information System – mitigation techniques, species ID & safe handling, regulations, curated literature
• Lenfest Ocean Program publication on regional governance of bycatch in tuna fisheries
• Project GLOBAL: Global Bycatch Assessment of Long-Lived Species project
• Oceana facts about bycatch/dirty fishing
• FAO document on bycatch and discard
• Greenpeace facts about bycatch
• Alaska Marine Conservation Council
• Johnson, Douglas H; Shaffer, Terry L and Gould, Patrick J (1990) Incidental Catch of Marine Birds in the North Pacific High Seas Driftnet Fisheries U.S. Geological Survey.
• Valdemarsen, John W Incidental catch of seabirds in longline fisheries UN Atlas of the Oceans: Fishery Technology Service.

v t e Fishery science topics
Fisheries science and wild fisheries Fisheries science Population dynamics of fisheries Shifting baseline Fish stock Fish mortality Condition index Stock assessment Fish measurement Standard weight in fish Fish counter Data storage tag Catch per unit effort Otolith microchemical analysis Biomass Fisheries acoustics Acoustic tag Coded wire tag GIS and aquatic science Pop-up satellite archival tag EcoSCOPE Age class structure Trophic level Trophic cascades Hydrographic containment Match/mismatch hypothesis Climate change and fisheries Marine biology Aquatic ecosystems Bioeconomics EconMult Ecopath FishBase Census of Marine Life OSTM/Jason-2 Fisheries databases Institutes Fisheries scientists Wild fisheries Ocean fisheries Diversity of fish Coastal fish Coral reef fish Demersal fish Forage fish Pelagic fish Cod fisheries Crab fisheries Eel fisheries Krill fisheries Kelp fisheries Lobster fisheries Shrimp fishery Eel ladder Fish ladder Fish screen Migration Salmon run Sardine run Shoaling and schooling Marine habitat Marine snow Water column Upwelling Humboldt current Algal blooms Dead zones Fish kill
Fisheries law, management, sustainability and conservation Law Fisheries law Exclusive economic zone Illegal, unreported and unregulated fishing United Nations Convention on the Law of the Sea United Nations Fish Stocks Agreement Fisheries Convention Magnuson–Stevens Act Management Fisheries management Monitoring control and surveillance Vessel monitoring system Fishery Resources Monitoring System Catch reporting Fisheries observer Catch share Individual fishing quota Minimum landing size Pulse fishing Slot limit EU Common Fisheries Policy EU MLS European Fisheries Control Agency National Marine Fisheries Service Regional fishery body Regional fishery management organisation Sustainability Sustainable fishery Maximum sustainable yield List of commercially important fish species Sustainable seafood Overfishing Environmental impact of fishing Fishing down the food web Destructive fishing practices Future of Marine Animal Populations The Sunken Billions The End of the Line Bycatch Discards Incidental catch Cetacean bycatch Turtle excluder device Shrimp-Turtle case Conservation Marine protected area Marine reserve Marine conservation Marine conservation activism Salmon conservation Grey nurse shark conservation Shark sanctuary European Environmental Agency U.S. Fish and Wildlife Service Advocacy FishAct Marine Stewardship Council Aquaculture Stewardship Council Friend of the Sea SeaChoice Seafood Watch Ocean Conservancy Ocean Outcomes Oceana Save Our Seas Foundation Sea Around Us WorldFish Defying Ocean's End HERMIONE PROFISH International Seafood Sustainability Foundation Sea Shepherd Conservation Society Greenpeace Related issues CalCOFI Fish slaughter Marine pollution Mercury in fish Shark culling Shark finning Threatened sharks Threatened rays Outline of fishing Index of fishing articles Glossary of fishery terms

v t e Fishing industry topics
Wild fisheries Fishing industry Artisanal fishing Bycatch Commercial fishing Declawing of crabs Fish slaughter List of harvested aquatic animals by weight Trawling Overfishing Pair trawling Midwater trawling Bottom trawling Seining Gillnetting Longlining Lobster fishing Trolling Dredging Fishing vessels Fish trap Power block Shark finning Fisheries Agulhas Bank Crab fisheries Cod fisheries Fishing by country Fisheries management Illegal fishing in Africa Krill fishery Ocean fisheries World fish production North Sea Shrimp fishery
Aquaculture and farmed fisheries Aquaculture Aquaculture engineering Aquaponics Best practices Copper alloys Geothermal energy and aquaculture Inland saline Integrated multi-trophic Mariculture Antimicrobials Offshore Organic Raceway Recirculating Fish farming Broodstock Catfish Cobia Fish diseases and parasites Fish farming Fish feed Fish hatchery Fish stocking Spawning bed Salmon Tilapia Tailwater US hatcheries Algaculture Giant kelp Microalgae Microalgal bacterial flocs Photobioreactor Raceway pond Seaweed Other species Brine shrimp Coral Freshwater prawns Geoduck Hirudiculture Marine shrimp Octopus Oysters Scallops Sea cucumber Sea sponges Turtles By country Australia Canada Chile China East Timor Federated States of Micronesia Fiji Indonesia Kiribati Madagascar Marshall Islands Nauru New Zealand Palau Papua New Guinea Philippines Samoa Solomon Islands South Africa South Korea Tonga Tuvalu United Kingdom United States Alaska Hawaii Maine Vanuatu
Seafood processing and marketing Seafood processing Fish processing Fish factory Factory ship Fish preservation Slurry ice Dried fish Filleted fish Gibbing Salmon cannery Salted fish Smoked fish Kippers Seafood products Seafood Fish as food Cod liver oil Fish products Fish emulsion Fish meal Fish hydrolysate Fish oil Fish protein powder Fish sauce Gravlax Hákarl Lox Lutefisk Rakfisk Roe Bottarga Caviar Eoran Red caviar Pollock roe Tobiko Karasumi Shrimp paste Surimi Surströmming Seafood marketing Fish marketing Live fish trade Shrimp marketing Chasse-marée Fishmonger Fishwife Worshipful Company of Fishmongers Fish markets Billingsgate Busan English (Ireland) Fulton Garak Honolulu Huanan Jagiroad Jagalchi La Nueva Viga Maine Avenue Muara Angke Nouakchott Noryangjin Oluwo Pasil Peterhead Pike Place Sydney Scania Taipei Toyosu Tsukiji Ulsan Waterfront (Dubai)

• Environmental impact of fishing
• Bird mortality