Patagonotothen guntheri

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Yellowfin notothen
Patagonotothen guntheri.gif
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Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Nototheniidae
Genus: Patagonotothen
Species:
P. guntheri
Binomial name
Patagonotothen guntheri
(Norman, 1937)

Patagonotothen guntheri, the yellowfin notothen, is a species of notothen found in the Argentinian region of Patagonia, the Falkland Islands, the Burdwood Bank and the Shag Rocks (where it is found in abundance) west of South Georgia on the continental shelf at depths of 120-250 m (394-820 ft), but may be found in waters deeper than 250 m in the Argentinian region. [1]

Contents

Etymology

This species was named in honor of Mr. E. R. Gunther, a fisheries biologist of the Discovery investigations. [1]

Description

This species is a small notothen with lemon yellow caudal, pectoral and pelvic fins. The anal and dorsal fins are also yellow. All fins are lighter at the tips and the body is generally colored gray, with the snout and the top of the head being darker. 2 or 3 dark stripes extend across the cheek, and a horizontal stripe may be present above the eye. This species attains a maximum length of 23 cm (9 inches). Up to 9 cross-bars may form on the body after preservation. [1]

This species is very similar to congener Patagonotothen brevicauda , however, it has more gill rakers (26 to 39 in total compared to 22 to 27 in total) and the difference between the number of pectoral fin rays (23-26 compared to 22–25, with a mean of 24.8 for P. guntheri and a mean of 23.0 for P. brevicauda) can also be used to distinguish between the two species. [1]

Ecology

This species is a benthopelagic predator which mainly feeds on krill (comprising 89% of total prey mass), but also takes amphipods. At around 3-4 years of age, females may spawn for the first time, with the Shag Rocks being a spawning hotspot. [2] [1]

Commercial importance

This species was once very important to commercial fisheries, with 12, 000 tonnes (13, 228 tons) being landed in 1979 from the Shag Rocks alone. [1] However, this is no longer the case; it is of little to no commercial importance at present. [3]

Related Research Articles

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Nototheniidae, the notothens or cod icefishes, is a family of ray-finned fishes, part of the suborder Notothenioidei which is traditionally placed within the order Perciformes. They are largely found in the Southern Ocean.

Antarctic silverfish Species of fish

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<i>Epinephelus albomarginatus</i> Species of fish

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<i>Notothenia</i> Genus of fishes

Notothenia is a genus of marine ray-finned fishes belonging to the family Nototheniidae, the notothens or cod icefishes with the species in this genus often having the common name of rockcod. They are native to the Southern Ocean and other waters around Antarctica.

Painted notie Species of fish

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Mackerel icefish Species of fish

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<i>Paranotothenia magellanica</i> Species of fish

Paranotothenia magellanica), also known as Magellanic rockcod, Maori cod, blue notothenia or orange throat notothen, is a species of marine ray-finned fish, belonging to the family Nototheniidae, the notothens or cod icefishes. It is native to the Southern Ocean. "Maori chief" and "black cod", sometimes used for this species, usually refer to fishes from the related genus Notothenia. Being a perciform fish, it is unrelated to the true cods of the order Gadiformes. This species is commercially important as a food fish.

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<i>Gobionotothen</i> Genus of fishes

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.

Grey rockcod Species of fish

The grey rockcod, also known as the grey notothen, stripe-eyes notothen or stripe-eyed rockcod, is a species of marine ray-finned fish belonging to the family Nototheniidae, the notothens or cod icefishes. It is native to the Southern Ocean,The grey rockcod feed mainly on macrozooplankton and is of minor importance to commercial fisheries. It is the only species in the genus Lepidonotothen

<i>Lindbergichthys</i> Genus of fishes

Lindbergichthys is a genus of marine ray-finned fishes belonging to the family Nototheniidae, the notothens or cod icefishes.

Toad notie Species of fish

The toad notie, or toad notothen, is a species of marine ray-finned fish, belonging to the family Nototheniidae, the notothens or cod icefishes. It is native to the Indian sector of the Southern Ocean.

Nototheniops is a genus of marine ray-finned fishes belonging to the family Nototheniidae, the notothens or cod icefishes. The species in this genus are native to the Southern Ocean.

<i>Patagonotothen</i> Genus of fishes

Patagonotothen is a genus of marine ray-finned fishes, belonging to the family Nototheniidae, the notothens or cod icefishes. They are native to the southeast Pacific Ocean, southern Atlantic Ocean and the Southern Ocean.

<i>Lindbergichthys nudifrons</i> Species of fish

Lindbergichthys nudifrons, the yellowfin rockcod, also known as the yellow notie or the gaudy notothen, is a species of marine ray-finned fish, belonging to the family Nototheniidae, the notothens or cod icefishes. It is native to the Atlantic sector of the Southern Ocean.

<i>Gvozdarus svetovidovi</i> Species of fish

Gvozdarus svetovidovi, the naked-head toothfish, is a species of marine ray-finned fish belonging to the family Nototheniidae, the notothens or cod icefishes. It is found in the Ross and Cooperation Seas, probably south of the Antarctic Polar Front from pelagic waters down to depths of 550 m, though it is normally found in a pelagic environment.

<i>Gobionotothen gibberifrons</i> Species of fish

Gobionotothen gibberifrons, the humped rockcod or the humphead notothen, is a species of marine ray-finned fish belonging to the family Nototheniidae, the notothens or cod icefishes. It is native to the islands of the Scotia Arc, the northern part of the Antarctic Peninsula, and Heard Island in the Southern Ocean. This species inhabits depths of 6-429 m, but is most abundant at depths of 100-400 m, at least around Elephant Island.

<i>Gobionotothen marionensis</i> Species of fish

Gobionotothen marionensis, the lobe-lip notothen, is a species of marine ray-finned fish belonging to the family Nototheniidae, the notothens or cod icefishes. It is native to the South Georgia and the South Sandwich Islands in the Atlantic Ocean, and the Crozet and Prince Edward Islands in the Indian Ocean.>

Gobionotothen acuta, the triangular rockcod or the triangular notothen, is a species of marine ray-finned fish belonging to the family Nototheniidae, the notothens or cod icefishes. It is native to the French Southern and Antarctic Lands, the Heard Islands and the Kerguelen Plateau in the Southern Ocean.

Patagonotothen brevicauda, the Patagonian rockcod, is a species of marine ray-finned fish, belonging to the family Nototheniidae, the notothens or cod icefishes. It is native to oceans of the Patagonian region, including Tierra del Fuego, the Strait of Magellan, the Beagle Channel and the Falkland Islands.

References

  1. 1 2 3 4 5 6 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.
  2. Kock, K.H. and A. Kellerman, 1991. Reproduction in Antarctic notothenoid fish. Antarc. Sci. 3(2):125-150.
  3. Froese, Rainer and Pauly, Daniel, eds. (2021). "Patagonotothen guntheri" in FishBase . June 2021 version.