fishery



A fishery (plural: fisheries) is an organized effort by humans to catch fish or other aquatic species, an activity known as fishing. Generally, a fishery exists for the purpose of providing human food, although other aims are possible (such as sport or recreational fishing), or obtaining ornamental fish or fish products such as fish oil. Industrial fisheries are fisheries where the catch is not intended for direct human consumption (Castro and Huber 2003).

The fishing effort is generally centered on either a particular ecoregion or a particular species or type of fish or aquatic animal, and usually fisheries are differentiated by both criteria. Examples would be the salmon fishery of Alaska, the cod fishery off the Lofoten islands or the tuna fishery of the Eastern Pacific. Most fisheries are marine, rather than freshwater; most marine fisheries are based near the coast. This is not only because harvesting from relatively shallow waters is easier than in the open ocean, but also because fish are much more abundant near the coastal shelf, due to coastal upwelling and the abundance of nutrients available there.
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Fishing nets on a shrimp boat - Ostend, Belgium

Fisheries historically

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Egyptians bringing in fish, and splitting for salting


One of the world’s longest lasting trade histories is the trade of dry cod from the Lofoten area to the southern parts of Europe, Italy, Spain and Portugal. The trade in cod started during the Viking period or before, has been going on for more than 1000 years and is still important.

In India, the Pandyas, a classical Dravidian Tamil kingdom, were known for the pearl fishery as early as the 1st century BC. Their seaport Tuticorin was known for deep sea pearl fishing. The paravas, a Tamil caste centred in Tuticorin, developed a rich community because of their pearl trade, navigation knowledge and fisheries.

Fisheries in the present day

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Fishing boat deck with white hake, 1936


Today, fisheries are estimated to provide 16% of the world population's protein, and that figure is considerably elevated in some developing nations and in regions that depend heavily on the sea.

According to the Food and Agriculture Organization of the United Nations, total world capture fisheries production in 2000 was 86 million tons (FAO 2002). The top producing countries were, in order, the People's Republic of China (excluding Hong Kong and Taiwan), Peru, Japan, the United States, Chile, Indonesia, Russia, India, Thailand, Norway and Iceland. Those countries accounted for more than half of the world's production; China alone accounted for a third of the world's production. Of that production, over 90% was marine and less than 10% was inland.

There are large and important fisheries worldwide for various species of fish, mollusks and crustaceans. However, a very small number of species support the majority of the world’s fisheries. Some of these species are herring, cod, anchovy, tuna, flounder, mullet, squid, shrimp, salmon, crab, lobster, oyster and scallops. All except these last four provided a worldwide catch of well over a million tonnes in 1999, with herring and sardines together providing a catch of over 22 million metric tons in 1999. Many other species as well are fished in smaller numbers.

Methods

A fishery can consist of one man with a small boat hand-casting nets, to a huge fleet of trawlers processing tons of fish per day. Some techniques are (bottom-) trawling, seining, driftnetting, handlining, longlining, gillnetting, dragging, tiling, and diving.

Fisheries and communities

For communities, fisheries provide not only a source of food and work but also a community and cultural identity. [1]
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Salmon Fishery in Puget Sound, WA., no date


This shows up in art, literature, and traditions.

Fisheries science

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Fisheries scientists sorting a catch of small fish and langoustine.
Fisheries science is the academic discipline of managing and understanding fisheries. It draws on the disciplines of biology, ecology, oceanography, economics and management to attempt to provide an integrated picture of fisheries. It is typically taught in a university setting, and can be the focus of an undergraduate, master's or Ph.D. program. In some cases new disciplines have emerged, as in the case of bioeconomics. A few universities also offer fully integrated programs in fisheries science.

See also: International Council for the Exploration of the Sea

Important issues and topics in fisheries

There are many environmental issues surrounding fishing. These can be classed into issues that involve the availability of fish to be caught, such as overfishing, sustainable fisheries, and fisheries management; and issues surrounding the impact of fishing on the environment, such as by-catch. These fishery conservation issues are generally considered part of marine conservation, and many of these issues are addressed in fisheries science programs. There is an apparent and growing disparity between the availability of fish to be caught and humanity’s desire to catch them, a problem that is exacerbated by the rapidly growing world population. As with some other environmental issues, often the people engaged in the activity of fishing – the fishers – and the scientists who study fisheries science, who are often acting as fishery managers, are in conflict with each other, as the dictates of economics mean that fishers have to keep fishing for their livelihood, but the dictates of sustainable science mean that some fisheries must close or reduce to protect the health of the population of the fish themselves. It is starting to be realized, however, that these two camps must work together to ensure fishery health through the 21st century and beyond.

The cover story of the May 15, 2003 issue of the science journal Nature – with Dr. Ransom A. Myers, an internationally prominent fisheries biologist (Dalhousie University, Halifax, Canada) as the lead author – was devoted to a summary of the scientific information. The story asserted that, as compared with 1950 levels, only a remnant (in some instances, as little as 10%) of all large ocean-fish stocks are left in the seas. These large ocean fish are the species at the top of the food chains (e.g., tuna, cod, among others). However, this article was subsequently criticized as being fundamentally flawed, although much debate still exists (Walters 2003; Hampton et al. 2005; Maunder et al. 2006; Polacheck 2006;Sibert et al. 2006) and the majority of fisheries scientists now consider the results irrelevant with respect to large pelagics (the open seas).[1]

In mid October 2006, U.S. President Bush joined other world leaders calling for a moratorium on deep-sea trawling, a practice shown to often have harmful effects on sea habitat, hence on fish populations.

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 degraded. Yet again the analysis has met criticism as being fundamentally flawed, and many fishery management officials, industry representatives and scientists challenge the findings, although the debate continues. Many countries, such as Tonga, the United States, Australia and New Zealand, and international management bodies have taken steps to appropriately manage marine resources.[2][3]

For further information

The literature on fisheries—both scientific and popular—is vast. The literature is subdivided into dozens of topics, from fishing gear design, to the impact of fish biology and oceanography on fisheries, to how to most effectively manage fisheries. Some well known journals about fisheries are Fisheries, Fisheries Oceanography, Fishery Bulletin, and The Canadian Journal of Aquatic and Fishery Sciences. In addition, many countries have their own regional journals.

References

Cited

1. ^ Changes in the Biomass of Large Pelagic Predators [2]
2. ^ Worm, Boris, et al. (2006-11-03). "Impacts of Biodiversity Loss on Ocean Ecosystem Services". Science 314 (5800): 787 - 790. DOI:10.1126/science.1132294. Retrieved on 2006-11-04. 
3. ^ Juliet Eilperin (2 November 2006). "Seafood Population Depleted by 2048, Study Finds". The Washington Post.

General

  • Castro, P. and M. Huber. (2003). Marine Biology. 4th ed. Boston: McGraw Hill.
  • Hampton, J., Sibert, J. R., Kleiber, P., Maunder, M. N., and Harley, S. J. 2005. Changes in abundance of large pelagic predators in the Pacific Ocean. Nature, 434: E2-E3.
  • Maunder, M.N., Sibert, J.R. Fonteneau, A., Hampton, J., Kleiber, P., and Harley, S. 2006. Interpreting catch-per-unit-of-effort data to asses the status of individual stocks and communities. ICES Journal of Marine Science, 63: 1373-1385.
  • Myers, Ransom and Boris Worm. (May 15, 2003). "Rapid worldwide depletion of predatory fish communities," Nature, Vol 423. London: Nature Publishing.
  • Polacheck, T. 2006. "Tuna longline catch rates in the Indian Ocean: did industrial fishing result in a 90% rapid decline in the abundance of large predatory species?" Marine Policy, 30: 470-482.
  • FAO Fisheries Department. (2002). The State of World Fisheries and Aquaculture. Rome: Food and Agriculture Organization of the United Nations.
  • Sibert, et al. 2006. Biomass, Size, and Trophic Status of Top Predators in the Pacific Ocean Science 314: 1773
  • Walters, C. J. 2003. Folly and fantasy in the analysis of spatial catch rate data. Canadian Journal of Fisheries and Aquatic Sciences, 60: 1433-1436.
  • Pelagic Fisheries Research Program
  • International Collective in Support of Fishworkers website
  • United Nations conference in criticism of deep-sea trawling
  • Bush backs international deep-sea trawling moratorium
  • Re-interpreting the Fisheries Crisis seminar by Prof. Ray Hilborn

See also

External links

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Fishing is the activity of hunting for fish by hooking, trapping, or gathering. By extension, the term fishing is applied to pursuing other aquatic animals such as various types of shellfish, squid, octopus, turtles, frogs, and some edible marine invertebrates.
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Food is any substance, usually composed primarily of carbohydrates, fats, water and/or proteins, that can be eaten or drunk by an animal or human being for nutrition or pleasure.
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Sport fishing is a term (often used interchangeably with game fishing) that describes recreational fishing where the primary reward is the challenge of finding and catching the fish rather than the culinary or financial value of the fish's flesh.
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aquarium (plural aquariums or aquaria) is a vivarium consisting of at least one transparent side in which water-dwelling plants or animals are kept. Aquaria are primarily used for fishkeeping, although invertebrates, amphibians, marine mammals, and aquatic plants
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Fish oil is oil derived from the tissues of oily fish.

Fish oil is recommended for a healthy diet because it contains the omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), precursors to eicosanoids that reduce inflammation throughout the body
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The fishing industry is the commercial activity aimed at delivery of fish and other seafood products for human consumption or as input factors in other industrial processes.
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An ecoregion (ecological region), sometimes called a bioregion, is the next smallest ecologically and geographically defined area beneath "realm" or "ecozone". Ecoregions cover relatively large area of land or water, and contain characteristic, geographically distinct
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Salmon is the common name for several species of fish of the family Salmonidae. Several other fish in the family are called trout. Salmon live in both the Atlantic and Pacific Oceans, as well as the Great Lakes and other land locked lakes.
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G. morhua

Binomial name
Gadus morhua
Linnaeus, 1758

The Atlantic cod, Gadus morhua, is a well-known food fish belonging to the family Gadidae.
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Lofoten is an archipelago and a traditional district in the county of Nordland, Norway. Though lying within the Arctic Circle, the archipelago experiences one of the world's largest elevated temperature anomalies relative to its high latitude.
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Tuna are several species of ocean-dwelling fish in the family Scombridae, mostly in the genus Thunnus. Some tuna are able to inhabit freshwater environs as well. Tunas are fast swimmers—they have been clocked at 77 km/h (48 mph)—and include several species that
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Earth's oceans
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The Pacific Ocean (from the Latin name Mare Pacificum
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Seawater is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of ~3.5%, or 35 parts per thousand. This means that every 1 kg of seawater has approximately 35 grams of dissolved salts (mostly, but not entirely, the ions of sodium chloride: Na
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Fresh Water is the debut album by Australian rock and blues singer Alison McCallum, released in 1972. Rare for an Australian artist at the time, it came in a gatefold sleeve.
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coast is defined as the part of the land adjoining or near the ocean. A coastline is properly a line on a map indicating the disposition of a coast, but the word is often used to refer to the coast itself.
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coast is defined as the part of the land adjoining or near the ocean. A coastline is properly a line on a map indicating the disposition of a coast, but the word is often used to refer to the coast itself.
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Upwelling is an oceanographic phenomenon that involves wind-driven motion of dense, cooler, and usually nutrient-rich water towards the ocean surface, replacing the warmer, usually nutrient-depleted surface water.
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macronutrients and those needed in relatively small quantities are called micronutrients.

See healthy diet for information on the role of nutrients in human nutrition.

Types of human nutrients

Macronutrients are defined in several different ways.
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COD may refer to many different topics, including:
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Lofoten is an archipelago and a traditional district in the county of Nordland, Norway. Though lying within the Arctic Circle, the archipelago experiences one of the world's largest elevated temperature anomalies relative to its high latitude.
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Europe is one of the seven traditional continents of the Earth. Physically and geologically, Europe is the westernmost peninsula of Eurasia, west of Asia. Europe is bounded to the north by the Arctic Ocean, to the west by the Atlantic Ocean, to the south by the Mediterranean Sea,
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Viking, also called Norseman or Northman, refers to a member of the Scandinavian seafaring traders, warriors and pirates who raided and colonized wide areas of Europe from the 8th to the 11th century[1]
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The Pandyan kingdom (Tamil: பாண்டியர்) was an ancient Tamil state in South India of unknown antiquity. Pandyas were one of the three ancient Tamil kingdoms (Chola and Chera being the other two) who ruled the Tamil
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Dravidian

Total population approx.
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Tamils  • Telugus  • Tuluvas  • Gonds

Tamil people
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