Johnius

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Johnius
Johnius amblycephalus.jpg
Bearded croaker ( Johnius amblycephalus )
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Acanthuriformes
Family: Sciaenidae
Genus: Johnius
Bloch, 1793
Type species
Johnius carutta
Bloch, 1793
Synonyms [1]

Johnius is a genus of marine ray-finned fishes belonging to the family Sciaenidae, the drums and croakers. They are commonly known as croakers due to their ability to produce purring, croaking and knocking sounds. The sounds are produced mainly at night and are thought to be either involved in defense or for courtship. [2]

Contents

Taxonomy

The genus name was erected by Marcus Bloch in 1793 based on a specimen obtained from Tranquebar from Reverend Christoph Samuel John which was named as Johnius carutta. There are about 36 species in the genus, all within the Indo-West Pacific waters. [3] This genus has been placed in the subfamily Otolithinae by some workers, [4] but the 5th edition of Fishes of the World does not recognise subfamilies within the Sciaenidae which it places in the order Acanthuriformes. [5]

Two subgenera are recognised within the genus Johnius, the nominate subgenus has an inferior mouth with the teeth on the lower jaw being uniform in size, although there may be a small number of molar-like teeth towards the rear of the jaw. They also have the teeth on the rear of the upper jaw relatively closely set. The subgenus Johnieops has a terminal or subterminal mouth with an inner row of enlarged teeth on the lower jaw and the outer teeth on the upper jaw are relatively widely spaced. [6] The type species of Johnieops is Sciaena osseus Day, 1876. [1] However, the two subgenera may not represent monophyletic groupings. [6]

Etymology

Johnius honours the Danish missionary Christoph Samuel John who collected specimens at Tranquebar for Bloch, presumed to include the types of Johnius carutta and Pennahia aneus . [7]

Species

Johnius includes 36 species, [8] divided into two subgenera: [7]

Some authorities recognise Johnius sina as a valid species, [10] while others treat it as a synonym of J. dussumieri. [8]

Characteristics

Johnius croakers are relatively small Scaienids, typically less than 30 cm (12 in). They have a characteristic hammer-shaped swim bladder with between 12 and 20 pairs of dendritic appendages along its sides. [6] The first lateral appendage extends to the dorsal corner of the gill opening. They have large paired sagittal otoliths that are triangular. These fishes typically have a small mouth that is positioned sub-terminally to inferiorly. A few species have a short barbel on the chin but most species have no barbel on the chin. [3] The largest species as J. dorsalis and J. dussumieri which both have a maximum published total length of 40 cm (16 in). [8]

Distribution

Johnius croakers are found in the Indo-Pacific region from eastern Africa to Australia and New Guinea. [8]

Related Research Articles

<span class="mw-page-title-main">Sciaenidae</span> Family of fishes

Sciaenidae is a family of ray-finned fishes belonging to 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 293 to 298 species in about 66 or 67 genera.

<i>Cynoscion</i> Genus of fishes

Cynoscion is a genus of marine ray-finned fishes belonging to the family, Sciaenidae, the drums and croakers. These fishes are found off the coasts of North and South America in the western Atlantic and eastern Pacific Oceans. Many fishes in this genus have been given the common name weakfish.

<i>Pareques acuminatus</i> Species of fish

Pareques acuminatus, commonly known as the high-hat, donkeyfish, cubbyu, Steindachner's ribbonfish, streaked ribbonfish, striped ribbonfish or striped drum, is a species of marine ray-finned fish belonging to the genus Pareques in the family Sciaenidae, the drums and croakers. This species is found in the western Atlantic Ocean.

<i>Larimichthys</i> Genus of fishes

Larimichthys is a genus of marine ray-finned fishes belonging to the family Sciaenidae, the drums and croakers. These fishes, commonly known as yellow croakers, are found in the Western Pacific Ocean.

<i>Boesemania</i> Genus of freshwater fish

Boesemania is a monospecific genus of freshwater fish in the family Sciaenidae. This genus contains the single species Boesemania microlepis. Also known as the Boeseman croaker and smallscale croaker, this fish lives in southeast Asian rivers.

<i>Corvula</i> Genus of fishes

Corvula is a genus of marine ray-finned fishes belonging to the family Sciaenidae, the drums and croakers. These fishes are found in the western Atlantic Ocean and the central eastern Pacific Ocean.

<i>Otolithes ruber</i> Species of fish

Otolithes ruber, commonly known as the tigertooth croaker, silver teraglin, wiretooth, snapper kob, snapper salmon, Yankee whiting or Yankee salmon is a species of marine ray-finned fish belonging to the family Sciaenidae, the drums and croakers. This species is found in the Indo-Pacific region.

<i>Johnius amblycephalus</i> Species of fish

Johnius amblycephalus, the bearded croaker, also known as the green-backed croaker or sharp-nosed jewfish, is a marine ray-finned fish belonging to the family Sciaenidae, the drums and croakers. This fish is found in the Indian and Pacific Oceans.

<i>Umbrina</i> Genus of fishes

Umbrina is a genus of fish from the croaker family Sciaenidae. The genus contains 17 species occurring in tropical and warm temperate waters of the Atlantic, the Mediterranean, the Western Indian Ocean and the eastern Pacific.

<i>Atractoscion</i> Genus of fishes

Atractoscion is a genus of marine ray-finned fished belonging to the family Sciaenidae, the drums and croakers. The fishes in this genus are found in the Atlantic, Indian and Pacific Oceans.

<i>Pareques</i> Genus of fishes

Pareques is a genus of marine ray-finned fishes belonging to the family Sciaenidae, the drums and croakers. These fishes are found in the western Atlantic Ocean and eastern Pacific Ocean.

<i>Odontoscion dentex</i> Species of fish

Odontoscion dentex, the reef croaker or brown large-eyed croaker, is a species of marine ray-finned fish belonging to the family Sciaenidae, the drums and croakers. It is found in coral and rocky reefs of the tropical Western Atlantic, living as solitary individuals or in small groups at a depth of 1 to 30 m. This species feeds on small fish, shrimp, and larvae.

The prickly croaker is a species of marine ray-finned fish belonging to the family Sciaenidae, the drums and croakers. The species is found in the Indo-West Pacific around southeast Asia. It is the only species in the monospecific genus Aspericorvina.

<i>Johnius dussumieri</i> Species of fish

Johnius dussumieri, the sin croaker, Dussumier's croaker, Dussumier's silver jewfish, sharptooth hammer croaker or whiskered croaker, is a marine ray-finned fish belonging to the family Sciaenidae, the drums and croakers. This fish is found in the Indian Ocean.

<i>Johnius carutta</i> Species of fish

Johnius carutta, the karut croaker or purple jewfish, is a species of marine ray-finned fish belonging to the family Sciaenidae, the drums and croakers. This species is found in the western Indian Ocean.

<i>Macrodon</i> Genus of fishes

Macrodon is a genus of marine ray-finned fishes belonging to the family Sciaenidae, the drums and croakers. These fishes are found in the eastern Pacific and western Atlantic Oceans.

<i>Odontoscion</i> Genus of fishes

Odontoscion is a genus of marine ray-finned fish belonging to the family Sciaenidae, the croakers and drums. These fishes are found in the Western Atlantic and Eastern Pacific Oceans.

<i>Otolithes</i> Small genus of marine ray-finned fishes

Otolithes is a small genus of marine ray-finned fishes belonging to the family Sciaenidae, the drums and croakers. The three recognised species in the genus are found in the Indo-West Pacific region.

<span class="mw-page-title-main">Half-mourning croaker</span> Species of fish

The half-mourning croaker is a species of marine ray-finned fish belonging to the family Sciaenidae, the drums and croakers. It is the only species in the monospecific genus Paranibea. This fish is found in the Indo-Pacific region.

<i>Pennahia</i> Genus of fishes

Pennahia is a genus of marine ray-finned fishes belonging to the family Sciaenidae, the drums and croakers. The fishes in this genus are found in the Indo-West Pacific region.

References

  1. 1 2 Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Sciaenidae". Catalog of Fishes . California Academy of Sciences . Retrieved 12 May 2023.
  2. ↑ Lin, Yuan C.; Mok, Hin K.; Huang, Bao Q. (2007). "Sound characteristics of big-snout croaker, Johnius macrorhynus (Sciaenidae)". The Journal of the Acoustical Society of America. 121 (1): 586–593. doi:10.1121/1.2384844. ISSN   0001-4966. PMID   17297812.
  3. 1 2 Chao, Ning Labbish; Chang, Chih-Wei; Chen, Meng-Hsien; Guo, Chang-Chang; Lin, Bai-An; Liou, You-Yu; Shen, Kang-Ning; Liu, Min (2019). "Johnius taiwanensis, a new species of Sciaenidae from the Taiwan Strait, with a key to Johnius species from Chinese waters". Zootaxa. 4651 (2): 259–270. doi:10.11646/zootaxa.4651.2.3. ISSN   1175-5334. S2CID   201210739.
  4. ↑ Kunio Sasaki (1989). "Phylogeny of the family Sciaenidae, with notes on its Zoogeography (Teleostei, Peciformes)" (PDF). Memoirs of the Faculty of Fishes Hokkaido University. 36 (1–2): 1–137.
  5. ↑ J. S. Nelson; T. C. Grande; M. V. H. Wilson (2016). Fishes of the World (5th ed.). Wiley. pp. 497–502. ISBN   978-1-118-34233-6.
  6. 1 2 3 Kunio Sasaki (2022). "Family Sciaenidae Croakers, Drums and Cobs". In Phillip C Heemstra; Elaine Heemstra; David A Ebert; Wouter Holleman; John E Randall (eds.). Coastal Fishes of the Western Indian Ocean Volume 3 (PDF). South African Institute for Aquatic Biodiversity. pp. 389–414. ISBN   978-1-990951-30-5.
  7. 1 2 Christopher Scharpf & Kenneth J. Lazara, eds. (12 January 2024). "Order ACANTHURIFORMES (part 5): Family SCIAENIDAE". The ETYFish Project Fish Name Etymology Database. v. 6.0. Christopher Scharpf and Kenneth J. Lazara. Retrieved 24 March 2024.
  8. 1 2 3 4 Froese, Rainer and Pauly, Daniel, eds. (2023). Species of Johnius in FishBase . February 2023 version.
  9. ↑ Norhafiz Hanafi; Meng-Hsien Chen; Yin-Giat Seah; et al. (2022). "Johnius sasakii, a new species of croaker (Perciformes: Sciaenidae) with a key to Johnius from East Malaysia, Borneo". Zootaxa. 5116 (3): 393–409. doi: 10.11646/ZOOTAXA.5116.3.5 . PMID   35391328. S2CID   247591447.
  10. ↑ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Johnius". Catalog of Fishes . California Academy of Sciences . Retrieved 16 May 2023.
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