Argentine seabass

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Argentine seabass
Acanthistius brasilianus (cropped).jpg
Argentine seabass near the Ilhas Cagarras, Brazil
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Serranidae
Genus: Acanthistius
Species:
A. brasilianus
Binomial name
Acanthistius brasilianus
(Cuvier, 1828)
Synonyms

The Argentine seabass (Acanthistius brasilianus) is a species of seabass in the family Serranidae. [1] It occurs on the South American continental shelf of the western Atlantic Ocean, where it used to be caught commercially for human consumption. [2] [3]

Contents

Taxonomy and naming

The Argentine seabass was first described by Georges Cuvier as part of his 22-volume work Histoire naturelle des poissons , which he wrote with Achille Valenciennes from 1828 to 1849. [4] [5] He originally named it Plectropoma brasilianum, though it is now considered a synonym of Acanthistius brasilianus. [4] [6] As a result of his participation in first voyage of HMS Beagle, Leonard Jenyns described a fish in 1840 that he named Plectropoma patachonica, and while many of the fishes he observed may have also been Argentine seabass, it is not totally clear whether P. patachonica is a true synonym of A. brasilianus. [4] [7]

Etymology

The Argentine seabass' genus name, Acanthistius, comes from the Greek akantha (ακανθα), meaning thorn and Greek, istio (ιστίο) meaning sail, which is in reference to the spines along the front of its dorsal fin. [2] [8] The species name, brasilianus, means "Brazilian". This is a reference to where the first specimens to be reported were caught. [4] [5]

Description

The Argentine seabass has a deep, compressed body and is covered in ctenoid scales, which are typical in teleost fishes. The dorsal profile is evenly arched and this arch is traced by the shape of the lateral line, which is covered by between 84 and 98 scales and runs from the upper margin of the operculum to the base of the caudal fin. The Argentine seabass' dorsal fin has 13 spines and 15 soft rays, while its anal fin has only 3 spines and 8 rays. [2] They generally reach maturity when around 29 centimetres (11 in) in length though they have been recorded to lengths of 60 centimetres (24 in). [9]

Distribution and habitat

The Argentine seabass is a rare species, [1] found only in the southwestern Atlantic Ocean, along the coasts of Argentina, Uruguay, and Brazil. [2] They generally inhabit cold waters along the South American continental shelf. [2] Typically marine (they may also be found in brackish waters), Argentine seabass have been reported at depths from 15 metres (49 ft) to 60 metres (200 ft). [1]

Argentine seabass are known to prey upon crabs and small fish. [2] They are in turn eaten by predators such as the Imperial shag. [2]

Relationship with humans

Argentine seabass are consumed by humans, typically being caught off Argentina and, to a lesser extent, Uruguay. [3] Their meat is generally marketed fresh, frozen or filleted. [2] [3] It is not known whether the Argentine seabass is experiencing any major environmental threats, and the overall population trend for this species is unknown. [1] It is classified as Data Deficient by the IUCN. [1]

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References

  1. 1 2 3 4 5 6 Sadovy, Y.J. (2010). "Acanthistius brasilianus". IUCN Red List of Threatened Species . 2010: e.T154987A4683767. doi: 10.2305/IUCN.UK.2010-4.RLTS.T154987A4683767.en . Retrieved 18 November 2021.
  2. 1 2 3 4 5 6 7 8 Froese, Rainer; Pauly, Daniel (eds.) (2020). "Acanthistius brasilianus" in FishBase . December 2020 version.
  3. 1 2 3 "Fisheries and Aquaculture - Aquatic species - Acanthistius brasilianus Cuvier,1828". Food and Agriculture Organization . United Nations. 2021. Archived from the original on 25 December 2021. Retrieved 25 December 2021.
  4. 1 2 3 4 Irigoyen, A. J.; Gerhardinger, L. C.; Carvalho-Filho, A. (2008). "On the status of the species of Acanthistius (Gill, 1862) (Percoidei) in the South-West Atlantic Ocean". Zootaxa. 1813 (1): 51–59. doi:10.11646/ZOOTAXA.1813.1.5. hdl: 11336/99657 .
  5. 1 2 Cuvier, M. & Valenciennes, L. B. (1828) Histoire Naturelle des Poissons. Museau de Histoire Naturelle (Paris), 2, 397.
  6. ↑ Jordan, D. S. (1890). A review of the genera and species of Serranidae found in the waters of America and Europe.
  7. ↑ Jenyns, L. 1840. The zoology of the voyage of H. M. S. Beagle, under the command of Captain Fitzroy, R. N., during the years 1832 to 1836. London: Smith, Elder, and Co. Issued in 4 parts. i–xvi + 1–172, Pls. 1–29. doi : 10.5962/bhl.title.109909
  8. ↑ Romero, P., 2002. An etymological dictionary of taxonomy. Madrid, unpublished. (manuscript resides in Fishbase as 45335_Romero.xls)
  9. ↑ Pereiro, S. and A. Vásquez, 1988. Peces marinos III. p. 65–94. In G.B. Cabal, B. Marcheti (eds.) Fauna Argentina: Peces. Centro Editor de América Latina S.A., Junin, Buenos Aires, Brazil, 102 p.
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