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Nototheniidae - Wikipedia, la enciclopedia libre

Nototheniidae

De Wikipedia, la enciclopedia libre


bacalaos de hielo
Antarctic toothfish in McMurdo Sound
Antarctic toothfish in McMurdo Sound
Clasificación científica
Reino: Animalia
Filo: Chordata
Clase: Actinopterygii
Orden: Perciformes
Suborden: Notothenioidei
Familia: Nototheniidae
Géneros

Aethotaxis
Cryothenia
Dissostichus
Gobionotothen
Gvozdarus
Lepidonotothen
Notothenia
Pagothenia
Paranotothenia
Patagonotothen
Pleuragramma
Trematomus
See text for species.

Los bacalos de hielo son de la familia Nototheniidae, de peces Perciformes y tienen unas 50 especies en 12 géneros.

[editar] Distribución

Los peces se ubican por la mayoria en el océano sureño y por la costa de la antártida As the dominant Antarctic fish taxa, they occupy both sea bottom and water column ecological niches. Although lacking a gas bladder, they have undergone a depth-related diversification, such as increase in fatty tissues and reduced mineralization of the bones, resulting in a body density approaching neutral, to fill a variety of water column niches. It is thought that the spleen may be used to remove ice crystals from circulating blood. As the chilly subantarctic waters averages –1 to 4 degrees Celsius, most Antarctic species have antifreeze glycoproteins in their blood and other body fluids.

Some species exhibit polymorphism, for example, the circum-Antarctic Trematomus newnesi exists as two morphs in the Ross Sea, the typical morph and a large mouth/broad headed morph.

As the major fish resource in the Southern Ocean, nototheniids are under increasing pressure from commercial fishing.

[editar] Clasificación

  • Gro. Aethotaxis
    • Aethotaxis mitopteryx
  • Gro. Cryothenia
  • Gro. Dissostichus
  • Gro. Gobionotothen
    • Gobionotothen acuta
    • Gobionotothen barsukovi
    • Gobionotothen gibberifrons
    • Gobionotothen marionensis
  • Gro. Gvozdarus
    • Gvozdarus svetovidovi
  • Gro. Lepidonotothen
    • Lepidonotothen kempi
    • Lepidonotothen larseni
    • Lepidonotothen macrophthalma
    • Lepidonotothen mizops
    • Lepidonotothen nudifrons
    • Lepidonotothen squamifrons
  • Gro. Notothenia
  • Gro. Pagothenia
  • Gro. Paranotothenia
  • Gro. Patagonotothen (todos no Antárticos)
    • Patagonotothen brevicauda
    • Patagonotothen canina
    • Patagonotothen cornucola
    • Patagonotothen elegans
    • Patagonotothen guntheri
    • Patagonotothen jordani
    • Patagonotothen kreffti
    • Patagonotothen longipes
    • Patagonotothen ramsayi
    • Patagonotothen sima
    • Patagonotothen squamiceps
    • Patagonotothen tessellata
    • Patagonotothen thompsoni
    • Patagonotothen wiltoni
  • Gro. Pleuragramma
  • Gro. Trematomus
    • Trematomus bernacchii
    • Trematomus eulepidotus
    • Trematomus hansoni
    • Trematomus lepidorhinus
    • Trematomus loennbergii
    • Trematomus newnesi
    • Trematomus nicolai
    • Trematomus pennellii
    • Trematomus scotti
    • Trematomus tokarevi
    • Trematomus vicarius

[editar] Citas


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