Merluccius capensis

Last updated

Shallow-water Cape hake
Merluccius capensis.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Gadiformes
Family: Merlucciidae
Genus: Merluccius
Species:
M. capensis
Binomial name
Merluccius capensis
Castelnau, 1861

Merluccius capensis (shallow-water Cape hake or South African hake) is a ray-finned fish in the genus Merluccius , found in the south-eastern Atlantic Ocean, along the coast of South Africa. It is a long, lean fish with a large head, similar in appearance to the European hake and the deep-water Cape hake. By day, it lives close to the bottom on the continental shelf and upper slope at depths not usually exceeding 400 m (1,300 ft); it makes a large, daily vertical migration rising at night to feed in the nectonic zone, and it also migrates southwards in spring and northwards in autumn. It is an important commercial fish species in southern Africa.

Contents

Description

Very similar to Merluccius merluccius (European hake) and Merluccius paradoxus (the deep-water Cape hake), M. capensis has an average length around 50 cm, up to a maximum around 120 cm (47 in). It is a long, lean fish with a large head, light brown above and white or silvery below. The first dorsal fin has a single spine and 9 to 11 soft rays, while the second has 38 to 43 soft rays. The anal fin has no spines and 37 to 41 soft rays. The caudal fin has a flat end or is slightly concave. [2]

Distribution

Its range extends southwards around the coast and into the Indian Ocean. On the east coast, it is less abundant and is rarely found in significant numbers north of KwaZulu-Natal. On the west coast, M. capensis occurs as far north as Benguela in Angola, where its distribution overlaps that of Merluccius polli , the Benguela hake. It lives close to the bottom on the continental shelf and upper slope at depths from 50 to 500 m, usually not below 400 m. Its preferred depth partly overlaps that of Merluccius paradoxus between depths of 200 and 400 m.

In South Africa, M. capensis is one of the most important commercial food fishes. Caught via demersal trawling, the associated industry is represented by the South Africa Deep Sea Trawling Industries Association (SADSTIA). It is known locally (from the Afrikaans stokvis) as stockfish, [3] not to be confused with the dried cod usually known by that name.

Ecology

The shallow-water Cape hake might be classified as a euryphagous carnivore; immature specimens feed on small, deep-sea fishes and crustaceans. Large hake feed on squid and fishes, as well; smaller hake and jack mackerel are major components of their diet. [4]

The shallow-water Cape hake migrates vertically, daily, being demersal by day and nektonic by night. On a seasonal basis, it migrates southwards in spring and northwards in autumn. Spawning is variably reported either to be year-round, or to occur mainly from mid-spring to early summer.

The Cape hake is often fished together with the species Merluccius paradoxus , which generally lives at greater depths. Most reported catches combine both species, but the range of M. capensis continues towards the north-west coast of southern Africa, in the region of Angola, where, for practical purposes, M. paradoxus does not occur. [4]

Related Research Articles

The term hake refers to fish in the:

Zeidae Family of fishes

The Zeidae are a family of large, showy, deep-bodied zeiform marine fish—the "true dories". Found in the Atlantic, Indian, and Pacific Oceans, the family contains just six species in two genera. All species are important and highly regarded food fish supporting commercial fisheries, and some—such as the John Dory —are enjoyed in large public aquaria. These fish are caught primarily by deep-sea trawling.

Atlantic horse mackerel Species of fish

The Atlantic horse mackerel, also known as the European horse mackerel or common scad, is a species of jack mackerel in the family Carangidae, the jacks, pompanos and trevallies. It is found in the eastern Atlantic Ocean off Europe and Africa and into the south-eastern Indian Ocean. It is an important species in commercial fisheries and is listed as a Vulnerable species on The IUCN Red List of Threatened Species.

Demersal fish Fish that live and feed on or near the bottom of seas or lakes

Demersal fish, also known as groundfish, live and feed on or near the bottom of seas or lakes. They occupy the sea floors and lake beds, which usually consist of mud, sand, gravel or rocks. In coastal waters they are found on or near the continental shelf, and in deep waters they are found on or near the continental slope or along the continental rise. They are not generally found in the deepest waters, such as abyssal depths or on the abyssal plain, but they can be found around seamounts and islands. The word demersal comes from the Latin demergere, which means to sink.

North Pacific hake Species of fish

The North Pacific hake, Pacific hake, Pacific whiting, or jack salmon is a ray-finned fish in the genus Merluccius, found in the northeast Pacific Ocean from northern Vancouver Island to the northern part of the Gulf of California. It is a silver-gray fish with black speckling, growing to a length of 90 cm (3 ft). It is a migratory offshore fish and undergoes a daily vertical migration from the surface to the seabed at depths down to about 1,000 m (3,300 ft). It is the object of an important commercial fishery off the West Coast of the United States, and annual quotas are used to prevent overfishing.

The scaly dragonfish or boa dragonfish, is a medium-sized abyssal barbeled dragonfish of the family Stomiidae. It is found at great depths worldwide in tropical to temperate oceans but is absent from the northern Pacific and northwest Atlantic Oceans.

<i>Mullus barbatus</i> Species of fish

Mullus barbatus is a species of goatfish found in the Mediterranean Sea, Sea of Marmara, the Black Sea and the eastern North Atlantic Ocean, where its range extends from Scandinavia to Senegal. They are fished, mostly by trawling, with the flesh being well regarded. The International Union for Conservation of Nature has assessed their conservation status as being of "least concern".

The South East Atlantic Fisheries Organisation (SEAFO) is an organization that maintains controls over fishing and fishing related acts in the Southeastern Atlantic Ocean.

<i>Merluccius</i> Genus of fishes

Merluccius is a genus of merluccid hakes from the Atlantic and Pacific Oceans, where mainly found relatively deep.

European pilchard Species of fish

The European pilchard is a species of ray-finned fish in the monotypic genus Sardina. The young of the species are among the many fish that are sometimes called sardines. This common species is found in the northeast Atlantic, the Mediterranean, and the Black Sea at depths of 10–100 m (33–328 ft). It reaches up to 27.5 cm (10.8 in) in length and mostly feeds on planktonic crustaceans. This schooling species is a batch spawner where each female lays 50,000–60,000 eggs.

<i>Merluccius merluccius</i> Species of fish

Merluccius merluccius, the European hake, is a merluccid hake of the genus Merluccius. Other vernacular names include Cornish salmon and herring hake. It is a predatory species which was often netted alongside one of its favoured prey, the Atlantic herring, thus the latter common name. It is found in the eastern Atlantic from the Norway and Iceland south to Mauritania and into the Mediterranean Sea. It is an important species in European fisheries and is heavily exploited with some populations thought to be being fished unsustainably.

Argentine hake Species of fish

The Argentine hake is a merluccid hake of the genus Merluccius, found in the southwestern Atlantic Ocean, along the coast of Argentina, and Uruguay. This fish was described by an Argentine ichthyologist, Tomás Marini in 1933.

Merluccius paradoxus, the deep-water Cape hake, is a merluccid hake of the genus Merluccius, found in the south-eastern Atlantic Ocean, along the coast of Southern Africa, south of Angola. Its range extends in decreasing abundance around the southern coast of Africa and into the Indian Ocean, but it is at its most plentiful in the cold, nutrient-rich fishing grounds of the Benguela Current.

Cape horse mackerel Species of fish

The Cape horse mackerel is a mackerel-like species in the family Carangidae. It is a pelagic species of the south eastern Atlantic Ocean which is a target of fisheries, mainly as bycatch.

Kingklip Species of fish from the South African coast

Genypterus capensis, commonly known as kingklip, is a species of cusk eel occurring along the Southern African coast from Walvis Bay in Namibia to Algoa Bay in South Africa, and is closely related to Genypterus blacodes from New Zealand. The species grows to a maximum length of 180 cm, a weight of 15.0 kg, and is one of the most popular fish items on South African menus. Despite appearances, it is not closely related to the eel family of Anguilliformes.

The Panama hake, also known as the dwarf hake, is a merluccid hake of the genus Merluccius, found off the west coast of the Americas from Del Mar, California, to Ensenada de Tumaco, Colombia.

The South African Deep-Sea Trawling Industry Association (SADSTIA) represents the trawler owners and operators active in the offshore demersal trawl fishery for hake, the most valuable of South Africa's commercial fisheries, contributing approximately 45 percent of the value of fishery production. Based in Cape Town, South Africa, SADSTIA currently has 32 members that catch, process and market the Cape hakes, Merluccius paradoxus and Merluccius capensis as well as several bycatch species.

Merluccius australis, the Southern hake, is a species of fish from the family Merlucciidae, the true hakes. It is found in the southern Pacific and Atlantic Oceans with two disjunct populations, one around southern South America and the other in the waters around New Zealand.

Merluccius polli, the Benguela hake, is a species of fish from the family Merlucciidae, the true hakes. It is found in the tropical waters of the eastern Atlantic Ocean off the west coast of Africa.

Merluccius senegalensis, the Senegalese hake, is a species of fish from the family Merlucciidae, the true hakes. It is found in the sub tropical waters of the eastern Atlantic Ocean off the north western coast of Africa.

References

  1. Iwamoto, T. (2015). "Merluccius capensis". The IUCN Red List of Threatened Species . 2015: e.T15522216A15603600. doi:10.2305/IUCN.UK.2015-4.RLTS.T15522216A15603600.en.
  2. "Merluccius capensis (Castelnau, 1861)". FAO. Retrieved 23 January 2016.
  3. Smith, Margaret M.; Heemstra, Philip C. (1995). Smiths' sea fishes. Grahamstown, South Africa: Southern Book Publishers. ISBN   978-1-86812-032-1.
  4. 1 2 Lloris, Domingo (2005). Hakes of the world (family Merlucciidae) : an annotated and illustrated catalogue of hake species known to date. Rome: Food and Agriculture Organization of the United Nations. ISBN   978-92-5-104984-6. available for download at http://www.fao.org