Nile perch total production thousand tonnes 1950-2022

The Nile perch (''Lates niloticus''), also known as the African snook, Goliath perch, African barramundi, Goliath barramundi, Giant lates or the Victoria perch, is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

freshwater fish Freshwater fish are fish species that spend some or all of their lives in bodies of fresh water such as rivers, lakes, ponds and inland wetlands, where the salinity is less than 1.05%. These environments differ from marine habitats in many wa ...

in family Latidae of order

Perciformes Perciformes (), also called the Acanthopteri, is an order or superorder of ray-finned fish in the clade Percomorpha. ''Perciformes'' means " perch-like". Among the well-known members of this group are perches and darters ( Percidae), and als ...

. It is widespread throughout much of the

Afrotropical realm The Afrotropical realm is one of the Earth's eight biogeographic realms. It includes Sub-Saharan Africa, the southern Arabian Peninsula, the island of Madagascar, and the islands of the western Indian Ocean. It was formerly known as the Ethiopi ...

, being native to the Congo,

Nile The Nile (also known as the Nile River or River Nile) is a major north-flowing river in northeastern Africa. It flows into the Mediterranean Sea. The Nile is the longest river in Africa. It has historically been considered the List of river sy ...

Senegal Senegal, officially the Republic of Senegal, is the westernmost country in West Africa, situated on the Atlantic Ocean coastline. It borders Mauritania to Mauritania–Senegal border, the north, Mali to Mali–Senegal border, the east, Guinea t ...

Niger Niger, officially the Republic of the Niger, is a landlocked country in West Africa. It is a unitary state Geography of Niger#Political geography, bordered by Libya to the Libya–Niger border, north-east, Chad to the Chad–Niger border, east ...

and

Lake Chad Lake Chad (, Kanuri language, Kanuri: ''Sádǝ'', ) is an endorheic freshwater lake located at the junction of four countries: Nigeria, Niger, Chad, and Cameroon, in western and central Africa respectively, with a catchment area in excess of . ...

, Volta,

Lake Turkana Lake Turkana () is a saline lake in the Kenyan Rift Valley, in northern Kenya, with its far northern end crossing into Ethiopia. It is the world's largest permanent desert lake and the world's largest alkaline lake. By volume it is the world ...

, and other river basins. It also occurs in the

brackish Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuari ...

waters of Lake Maryut in

Egypt Egypt ( , ), officially the Arab Republic of Egypt, is a country spanning the Northeast Africa, northeast corner of Africa and Western Asia, southwest corner of Asia via the Sinai Peninsula. It is bordered by the Mediterranean Sea to northe ...

. The Nile perch is a fish of substantial economic and food-security importance in East Africa. Originally described as ''Labrus niloticus,'' among the marine

wrasse The wrasses are a family, Labridae, of marine ray-finned fish, many of which are brightly colored. The family is large and diverse, with over 600 species in 81 genera, which are divided into nine subgroups or tribes. They are typically small, ...

s, the species has also been referred to as ''Centropomus niloticus''. Common names include African snook, Victoria perch (a misleading trade name, as the species is not native to

Lake Victoria Lake Victoria is one of the African Great Lakes. With a surface area of approximately , Lake Victoria is Africa's largest lake by area, the world's largest tropics, tropical lake, and the world's second-largest fresh water lake by surface are ...

, though they have been introduced there), and many local names in various African languages, such as the Luo name ''mbuta'' or ''mputa''. In

Tanzania Tanzania, officially the United Republic of Tanzania, is a country in East Africa within the African Great Lakes region. It is bordered by Uganda to the northwest; Kenya to the northeast; the Indian Ocean to the east; Mozambique and Malawi to t ...

, it is called ''sangara'', ''sankara'', or ''chenku''. In Francophone African countries, it is known as ''capitaine''. Its name in the

Hausa language Hausa (; / ; Hausa Ajami, Ajami: ) is a Chadic language spoken primarily by the Hausa people in the northern parts of Nigeria, Ghana, Cameroon, Benin and Togo, and the southern parts of Niger, and Chad, with significant minorities in Ivory Coas ...

is ''giwan ruwa'', meaning "water elephant".

Description

''L. niloticus'' is silver in color with a blue tinge. It has distinctive dark-black eyes, with a bright-yellow outer ring. One of the largest

es, it reaches a maximum length of nearly , weighing up to . Mature fish typically range from , although many fish are caught before they can grow this large. Capitaine Nile Perch

Adult Nile perch occupy all habitats of a lake with sufficient

oxygen Oxygen is a chemical element; it has chemical symbol, symbol O and atomic number 8. It is a member of the chalcogen group (periodic table), group in the periodic table, a highly reactivity (chemistry), reactive nonmetal (chemistry), non ...

concentrations, while juveniles are restricted to shallow or nearshore environments. A fierce

predator Predation is a biological interaction in which one organism, the predator, kills and eats another organism, its prey. It is one of a family of common List of feeding behaviours, feeding behaviours that includes parasitism and micropredation ...

that dominates its surroundings, the Nile perch feeds on fish (including its own species),

crustaceans Crustaceans (from Latin meaning: "those with shells" or "crusted ones") are invertebrate animals that constitute one group of Arthropod, arthropods that are traditionally a part of the subphylum Crustacea (), a large, diverse group of mainly aquat ...

mollusc Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...

s, and

insect Insects (from Latin ') are Hexapoda, hexapod invertebrates of the class (biology), class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (Insect morphology#Head, head, ...

s; the juveniles also feed on

zooplankton Zooplankton are the heterotrophic component of the planktonic community (the " zoo-" prefix comes from ), having to consume other organisms to thrive. Plankton are aquatic organisms that are unable to swim effectively against currents. Consequent ...

. Nile perch use schooling as a mechanism to protect themselves from other predators.

Invasive species

Nile perch have been introduced to many other lakes in Africa, including Lake Victoria and the artificial

Lake Nasser Lake Nasser ( ', ) is a large reservoir (water), reservoir in southern Egypt and northern Sudan. It was created by the construction of the Aswan Dam, Aswan High Dam and is one of the List of reservoirs by volume, largest man-made lakes in the wo ...

. The World Conservation Union's Invasive Species Specialist Group considers ''L. niloticus'' one of the world's 100 worst invasive species. The state of

Queensland Queensland ( , commonly abbreviated as Qld) is a States and territories of Australia, state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Austr ...

in Australia levies heavy fines on anyone found in possession of a living Nile perch, since it competes directly with the native barramundi, which is similar and grows to long, while the Nile perch grows to long. The species is of great commercial importance as a food fish. The Nile perch is also popular with sport anglers, as it attacks artificial

fishing lure A fishing lure is any of a broad category of inedible, artificial fishing baits designed to be " fake food" that mimic the appearances of prey and thus attract the attention of predatory fish when angling. Lures come in many shapes and designs t ...

s, and it is also raised in

aquaculture Aquaculture (less commonly spelled aquiculture), also known as aquafarming, is the controlled cultivation ("farming") of aquatic organisms such as fish, crustaceans, mollusks, algae and other organisms of value such as aquatic plants (e.g. Nelu ...

Lake Victoria introduction

The introduction of this species to Lake Victoria is one of the most cited examples of the negative effects alien species can have on ecosystems. The Nile perch was introduced to Lake Victoria in East Africa in the 1950s, and has since been fished commercially. In 2003, Nile perch sales to the EU reached 169 million euros. Sport-fishing in the region of Uganda and Tanzania provided additional income from tourism. Its introduction was ecologically disruptive and is attributed with causing the extinction or near-

extinction Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...

of several hundred native species, with some populations fluctuating with

commercial fishing Commercial fishing is the activity of catching fish and other seafood for Commerce, commercial Profit (economics), profit, mostly from wild fisheries. It provides a large quantity of food to many countries around the world, but those who practice ...

and the actual Nile perch stocks. The Nile perch initially fed on native cichlids, but with decreasing availability of this prey, it now consumes mainly small

shrimp A shrimp (: shrimp (American English, US) or shrimps (British English, UK)) is a crustacean with an elongated body and a primarily Aquatic locomotion, swimming mode of locomotion – typically Decapods belonging to the Caridea or Dendrobranchi ...

and

minnow Minnow is the common name for a number of species of small freshwater fish, belonging to several genus, genera of the family Cyprinidae and in particular the subfamily Leuciscinae. They are also known in Ireland as wikt:pinkeen, pinkeens. While ...

s. The alteration of the native ecosystem had disruptive socioeconomic effects on local communities bordering the lake. Many local people have been displaced from their traditional occupations in the fishing trade and brought them into the cash economy, or before the establishment of export-oriented fisheries, turned them into economic refugees. At least initially, nets strong enough to hold adult Nile perch could not be manufactured locally and had to be imported for a high price. The introduction of Nile perch has also had additional ecological effects on shore. Native cichlids were traditionally sun-dried, but because Nile perch have a high fat content (higher than cichlids), they need to be smoked to avoid spoiling. This has led to an increased demand for firewood in a region already hard-hit by

deforestation Deforestation or forest clearance is the removal and destruction of a forest or stand of trees from land that is then converted to non-forest use. Deforestation can involve conversion of forest land to farms, ranches, or urban use. Ab ...

soil erosion Soil erosion is the denudation or wearing away of the Topsoil, upper layer of soil. It is a form of soil degradation. This natural process is caused by the dynamic activity of erosive agents, that is, water, ice (glaciers), snow, Atmosphere of Ea ...

, and

desertification Desertification is a type of gradual land degradation of Soil fertility, fertile land into arid desert due to a combination of natural processes and human activities. The immediate cause of desertification is the loss of most vegetation. This i ...

. The

Academy Award The Academy Awards, commonly known as the Oscars, are awards for artistic and technical merit in film. They are presented annually by the Academy of Motion Picture Arts and Sciences (AMPAS) in the United States in recognition of excellence ...

-nominated documentary '' Darwin's Nightmare'' by

Hubert Sauper Hubert Sauper (born 27 July 1966) is an Austrian documentary filmmaker, director, writer, producer, and actor best known for ''Darwin's Nightmare'' (2004) which was nominated for an Academy Awards, Academy Award. Sauper has lived in the UK, Ital ...

(a French-Austrian-Belgian production, 2004) deals with the damage that has been caused by Nile perch introduction, including the import of weapons and ammunition in cargo planes from Europe, which are then used to export Nile perch, further exacerbating conflict and misery in the surrounding regions. Regardless of whether it is considered positive or negative, the

trophic web A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community. Position in the food web, or trophic level, is used in ecology to broadly classify organisms as autotrophs or he ...

of Lake Victoria appears to have been drastically impoverished by the introduction of this novel near- top-level predator. While the ecosystem seems to be moving towards a new equilibrium, neither its former state nor the state of fisheries on Lake Victoria can ever easily be brought back.

Threats

Despite being a successful invasive species, the fish faces threats. Being a species of

megafauna In zoology, megafauna (from Ancient Greek, Greek μέγας ''megas'' "large" and Neo-Latin ''fauna'' "animal life") are large animals. The precise definition of the term varies widely, though a common threshold is approximately , this lower en ...

, the most obvious threats to the species are overfishing and the use of

illegal fishing Illegal, unreported and unregulated fishing (IUU) is an issue around the world. Fishing industry observers believe IUU occurs in most fisheries, and accounts for up to 30% of total catches in some important fisheries. Illegal fishing takes pl ...

gear, as well as invasive water hyacinths. Prey depletion is also a factor, as it decreases the size of the fish and makes it vulnerable to larger predators, such as crocodiles.

Export

In 2021, The Uganda Fish Processors and Exporters Association called on the parliament to ban the local consumption of the species so as to protect its export.

Religion

Nile perch were involved with the worship of

Neith Neith (, a borrowing of the Demotic (Egyptian), Demotic form , also spelled Nit, Net, or Neit) was an ancient Egyptian deity, possibly of Ancient Libya, Libyan origin. She was connected with warfare, as indicated by her emblem of two crossed b ...

. As a result nile perch were sometimes mummified. A deposit of several thousand mummified perch was excavated in an area to the west of

Esna Esna ( , or ; ''Snē'' from ''tꜣ-snt''; ''Latópolis'' or (''Pólis Látōn'') or (''Lattōn''); Latin: ''Lato'') is a city of Egypt. It is located on the west bank of the Nile some south of Luxor. The city was formerly part of the ...

where there was a temple to Neith. Mummified perch have also been found at Gurob near a temple to Neith while perch statuettes have been found at Sais again in the context of a temple to Neith.

Notes

References

External links

* * * Lipton, David.

. ''Animal Diversity Web.'' Ann Arbor: University of Michigan Museum of Zoology, 2003. * Snoeks, Jos.
Ecology of ''Lates niloticus''
. ''Global Invasive Species Database.'' Updated 22 September 2004. *

IUCN The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the status ...

.
Alien Species Invade the Planet
. Press release, 11 May 2001.
Species Profile - Nile Perch (''Lates niloticus'')
National Invasive Species Information Center,

United States National Agricultural Library The United States National Agricultural Library (NAL) is one of the world's largest agricultural research libraries, and serves as a national library of the United States and as the library of the United States Department of Agriculture. Locate ...

. {{Taxonbar, from=Q654130

Nile perch The Nile perch (''Lates niloticus''), also known as the African snook, Goliath perch, African barramundi, Goliath barramundi, Giant lates or the Victoria perch, is a species of freshwater fish in family Latidae of order Perciformes. It is wides ...

Fauna of the Afrotropical realm Freshwater fish of West Africa Fish of Chad Fish of Egypt Freshwater fish of Kenya Fish of Sudan Fish of the Democratic Republic of the Congo Fish of the Republic of the Congo Freshwater fish of Tanzania Freshwater fish of Uganda Fish of Lake Turkana Congo River Nile Nile basin

Taxa named by Carl Linnaeus