Gobionotothen

Gobionotothen is a genus of marine ray-finned fishes belonging to the family Nototheniidae, the notothens or cod icefishes. They are native to the Southern Ocean.

Gobionotothen
Gobionotothen gibberifrons
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Nototheniidae
Genus: Gobionotothen
Balushkin, 1976
Type species
Notothenia gibberifrons
Lönnberg, 1905

Taxonomy

Gobionotothen was first formally described in 1976 by the Russian ichthyologist Arkady Vladimirovich Balushkin with the type species designated as Notothenia gibberifrons[1] which was described by the Swedish naturalist Einar Lönnberg in 1905 with its type locality given as South Georgia.[2] Some authorities place this taxon in the subfamily Nototheniinae,[3] but the 5th edition of Fishes of the World does not include subfamilies in the Nototheniidae.[4] The name of the genus is a compound of gobio meaning “goby”, referring to the goby-like form of these species and notothen, indicating that it is a nothothen.[5]

Species

Five recognized species are in this genus:[6]

Characteristics

Gobionotothen fishes have elongate bodies which are compressed towards the rear. The head has a convex dorsal profile and the space between the eyes is narrow. The mouth is small without a protruding lower jaw and they do not have large canine-like teeth. They have two lateral lines made up of tubed scales. The head is scaly, excep for the snout, lower jaw, the preorbital and the edge if the preoperculum. They have a rounded caudal fin.[3] The species vary in maximum total length from 20 cm (7.9 in) in G. angustifrons to 55 cm (22 in) in G. gibberifrons.[6]

Distribution, habitat and biology

Gobionotothen fishes have only been recorded from the northern part of the Antarctic Peninsula and the subantarctic islands. They are benthic predators feeding mainly on benthic invertebrates with some fish eggs and krill taken when available.[3]

Fisheries

Gobionotothen species, particularly G. gibberifrons, are moderately important to commercial fisheries off the South Georgia, South Shetland and South Orkney Islands.[3]

References
  1. Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Nototheniidae". Catalog of Fishes. California Academy of Sciences. Retrieved 20 September 2021.
  2. Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Gobionotothen". Catalog of Fishes. California Academy of Sciences. Retrieved 20 September 2021.
  3. H.H. Dewitt; P.C. Heemstra; and O. Gon (1990). "Nototheniidae Notothens". In O. Gon and P.C. Heemstra (eds.). Fishes of the Southern Ocean. South African Institute for Aquatic Biodiversity. ISBN 9780868102115.
  4. J. S. Nelson; T. C. Grande; M. V. H. Wilson (2016). Fishes of the World (5th ed.). Wiley. p. 465. ISBN 978-1-118-34233-6.
  5. Christopher Scharpf & Kenneth J. Lazara, eds. (12 April 2021). "Order Perciformes: Suborder Notothenoididei: Families Bovichtidae, Pseaudaphritidae, Elegopinidae, Nototheniidae, Harpagiferidae, Artedidraconidae, Bathydraconidae, Channichthyidae and Percophidae". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 20 September 2021.
  6. Froese, Rainer and Pauly, Daniel, eds. (2021). Species of Gobionotothen in FishBase. June 2021 version.
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