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''Argyrosomus regius'', also known as the meagre, croaker, jewfish, shade-fish, sowa, kir, corvina, salmon-bass or stone bass, is a species of
fish Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of li ...
of the family
Sciaenidae Sciaenidae are a family of fish in the order Acanthuriformes. They are commonly called drums or croakers in reference to the repetitive throbbing or drumming sounds they make. The family consists of about 286 to 298 species in about 66 to 70 gen ...
. This large fish has a pearly-silver to brownish coloration and a yellow-coloured mouth. It is native to the eastern Atlantic Ocean, as well as the
Mediterranean The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the e ...
and
Black Sea The Black Sea is a marginal mediterranean sea of the Atlantic Ocean lying between Europe and Asia, east of the Balkans, south of the East European Plain, west of the Caucasus, and north of Anatolia. It is bounded by Bulgaria, Georgia, Roma ...
s.


Taxonomy

''Argyrosomus regius'' was first formally described in 1801 as ''Perca regia'' by the Spanish
diplomat A diplomat (from grc, δίπλωμα; romanized ''diploma'') is a person appointed by a state or an intergovernmental institution such as the United Nations or the European Union to conduct diplomacy with one or more other states or internati ...
, naturalist,
lawyer A lawyer is a person who practices law. The role of a lawyer varies greatly across different legal jurisdictions. A lawyer can be classified as an advocate, attorney, barrister, canon lawyer, civil law notary, counsel, counselor, solic ...
and
historian A historian is a person who studies and writes about the past and is regarded as an authority on it. Historians are concerned with the continuous, methodical narrative and research of past events as relating to the human race; as well as the stu ...
Ignacio Jordán Claudio de Asso y del Rio Ignacio is a male Spanish and Galician name originating either from the Roman family name Egnatius, meaning born from the fire, of Etruscan origin, or from the Latin name "Ignatius" from the word "Ignis" meaning "fire". This was the name of sev ...
with the type locality given as
La Rochelle La Rochelle (, , ; Poitevin-Saintongeais: ''La Rochéle''; oc, La Rochèla ) is a city on the west coast of France and a seaport on the Bay of Biscay, a part of the Atlantic Ocean. It is the capital of the Charente-Maritime department. With ...
in
Charente-Maritime Charente-Maritime () is a department in the Nouvelle-Aquitaine region on the southwestern coast of France. Named after the river Charente, its prefecture is La Rochelle. As of 2019, it had a population of 651,358 with an area of 6,864 square kil ...
on the
Bay of Biscay The Bay of Biscay (), known in Spain as the Gulf of Biscay ( es, Golfo de Vizcaya, eu, Bizkaiko Golkoa), and in France and some border regions as the Gulf of Gascony (french: Golfe de Gascogne, oc, Golf de Gasconha, br, Pleg-mor Gwaskogn), ...
coast of France. The specific name ''regius'' means “royal”, this was not explained by Asso but may be a Latinisation of the
Catalan Catalan may refer to: Catalonia From, or related to Catalonia: * Catalan language, a Romance language * Catalans, an ethnic group formed by the people from, or with origins in, Northern or southern Catalonia Places * 13178 Catalan, asteroid #1 ...
name for this species, ''reix''.


Description

''Argyrosomus regius'' has a relatively large head with quite small eyes, the large mouth is at the terminal position and it has an elongated body. The
lateral line The lateral line, also called the lateral line organ (LLO), is a system of sensory organs found in fish, used to detect movement, vibration, and pressure gradients in the surrounding water. The sensory ability is achieved via modified epithelial ...
is easily seen and extends all the way to the
caudal fin Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as se ...
. The rear
dorsal Dorsal (from Latin ''dorsum'' ‘back’) may refer to: * Dorsal (anatomy), an anatomical term of location referring to the back or upper side of an organism or parts of an organism * Dorsal, positioned on top of an aircraft's fuselage * Dorsal co ...
fin is much longer than first one which has nine rays. The first ray of the anal fin is short and spiny while the second is very thin. The swim bladder contains several branched appendages which are vibrated to make a grunting sound which can be heard from up to 30m away and this grunting is produced by the males during the spawning season. Body colour pearly-silver, with bronze traits dorsally. The fin bases are reddish brown and mouth cavity yellow-gold or salmon pink. The scales are large and every fourth scale is set at a different angle from the rest. It can reach up to in total length and in weight.


Distribution

''Argyrosomus regius'' is found in the eastern Atlantic from
Norway Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe, the mainland territory of which comprises the western and northernmost portion of the Scandinavian Peninsula. The remote Arctic island of Jan Mayen and t ...
to
DR Congo The Democratic Republic of the Congo (french: République démocratique du Congo (RDC), colloquially "La RDC" ), informally Congo-Kinshasa, DR Congo, the DRC, the DROC, or the Congo, and formerly and also colloquially Zaire, is a country in ...
, including the
Mediterranean Sea The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the ea ...
and the
Black Sea The Black Sea is a marginal mediterranean sea of the Atlantic Ocean lying between Europe and Asia, east of the Balkans, south of the East European Plain, west of the Caucasus, and north of Anatolia. It is bounded by Bulgaria, Georgia, Roma ...
. It has colonised the
Red Sea The Red Sea ( ar, البحر الأحمر - بحر القلزم, translit=Modern: al-Baḥr al-ʾAḥmar, Medieval: Baḥr al-Qulzum; or ; Coptic: ⲫⲓⲟⲙ ⲛ̀ϩⲁϩ ''Phiom Enhah'' or ⲫⲓⲟⲙ ⲛ̀ϣⲁⲣⲓ ''Phiom ǹšari''; T ...
by migrating through the
Suez Canal The Suez Canal ( arz, قَنَاةُ ٱلسُّوَيْسِ, ') is an artificial sea-level waterway in Egypt, connecting the Mediterranean Sea to the Red Sea through the Isthmus of Suez and dividing Africa and Asia. The long canal is a popular ...
, an anti-Lessepsian migration. It is rare in the relatively cold, far north of its range, including off the British Isles (three records) and Scandinavia.


Behaviour and life history

''Argyrosomus regius'' is a
demersal The demersal zone is the part of the sea or ocean (or deep lake) consisting of the part of the water column near to (and significantly affected by) the seabed and the benthos. The demersal zone is just above the benthic zone and forms a layer of ...
,
oceanodromous Fish migration is mass relocation by fish from one area or body of water to another. Many types of fish migrate on a regular basis, on time scales ranging from daily to annually or longer, and over distances ranging from a few metres to thousa ...
fish which is found in inshore waters and on the
continental shelf A continental shelf is a portion of a continent that is submerged under an area of relatively shallow water, known as a shelf sea. Much of these shelves were exposed by drops in sea level during glacial periods. The shelf surrounding an island ...
, it can occur close to the bottom as well as in surface and mid-waters. The adults prey on
grey mullet Grey mullet can mean any of several fish in the family ''Mugilidae'' (the mullets) and having a greyish hue: * Flathead grey mullet, ''Mugil cephalus'' * Thicklip grey mullet, ''Chelon labrosus'' * Boxlip grey mullet, ''Oedalechilus labeo The bo ...
and clupeids such as sardines which are actively pursued in open water. The adults gather in inshore waters to spawn during spring and summer. The juveniles and subadults prefer estuaries and coastal lagoons, and the health of recruitment into the adult population is possibly determined by the availability of these habitats. These fish are migratory, at all ages, migrating along shore or between offshore and inshore waters in response to temperature changes. ''A. regius'' feeds on fishes and swimming crustaceans and mostly occurs over sand, close to rocks, at depths of , but commonly found at . The three main spawning sites in the North Atlantic and Mediterranean Sea are the
Nile delta The Nile Delta ( ar, دلتا النيل, or simply , is the delta formed in Lower Egypt where the Nile River spreads out and drains into the Mediterranean Sea. It is one of the world's largest river deltas—from Alexandria in the west to Po ...
, Lévrier Bay, and the
Gironde Gironde ( US usually, , ; oc, Gironda, ) is the largest department in the Nouvelle-Aquitaine region of Southwestern France. Named after the Gironde estuary, a major waterway, its prefecture is Bordeaux. In 2019, it had a population of 1,62 ...
estuary and with large numbers of adults congregate at these sites between May and July. Large schools of ''A. regius'' occur around wrecked ships that were deliberately sunk to create new habitat for a number of commercially caught species of fish. Most of their growth happens during the summer months and feeding activity is significantly reduced when the water temperature drops below . The newly hatched juveniles leave the estuaries where they spend the first few months at the end of summer and move into coastal waters with depths between where they spend the winter months. In the following Spring they return to their estuarine feeding areas from the middle of May. Water temperature is the most important factor that determines the trophic migration and reproduction of meagre. An adult female ''A. regius'' measuring in length produces about 800,000 eggs and spawning occurs when the water temperature is . The juveniles eat small demersal fish and crustaceans switching to pelagic fish and cephalopods once they grow to 30–40 cm in length.


Fisheries

''Argyrosomus regius'' is fished commercially using trawls, long lines, and hand lines. It is also a sport fishing quarry species. Specimens of 1.8 m in length and over 50 kg in weight which were landed in Portugal in 2002 fetched over €200. The main meagre fisheries are currently in Mauritania, Morocco, and Egypt and these account for over 80% of the annual world catch of around 10,000 tonnes. The European fisheries are comparatively small and are on the Atlantic coasts of Spain, Portugal and France with annual catches of 800 t in France, 400 t in Portugal and 150 t in Spain.


Aquaculture

The farming of ''Argyrosomus regius'' is still rather experimental and involves intensive production, in land-based tanks and sea cages. There are few facilities established mainly in southern France where they are in the
Camargue Camargue (, also , , ; oc, label= Provençal, Camarga) is a region of France located south of Arles, between the Mediterranean Sea and the two arms of the Rhône delta. The eastern arm is called the ''Grand Rhône''; the western one is the ''P ...
,
Cannes Cannes ( , , ; oc, Canas) is a city located on the French Riviera. It is a communes of France, commune located in the Alpes-Maritimes departments of France, department, and host city of the annual Cannes Film Festival, Midem, and Cannes Lions I ...
, and
Corsica Corsica ( , Upper , Southern ; it, Corsica; ; french: Corse ; lij, Còrsega; sc, Còssiga) is an island in the Mediterranean Sea and one of the 18 regions of France. It is the fourth-largest island in the Mediterranean and lies southeast of ...
, in
Huelva Huelva (, ) is a city in southwestern Spain, the capital of the province of Huelva in the autonomous community of Andalusia. It is between two short rias though has an outlying spur including nature reserve on the Gulf of Cádiz coast. The rias ...
, Spain, and at
La Spezia La Spezia (, or , ; in the local Spezzino dialect) is the capital city of the province of La Spezia and is located at the head of the Gulf of La Spezia in the southern part of the Liguria region of Italy. La Spezia is the second largest city ...
and Laguna di Orbetello in Italy. It is also produced in large quantities in Turkey.


References


External links


List of names in the various countries

Taxonomy of genus ''Argyrosomus''
{{Taxonbar, from=Q358337 Fish of the Atlantic Ocean Fish of the North Sea Fish of the Black Sea Fish of the Mediterranean Sea Fish of the Baltic Sea Fish of Europe Fish of Western Asia Sciaenidae Fish described in 1801 Taxa named by Ignacio Jordán Claudio de Asso y del Río