Gurgesiella atlantica (Bigelow & Schroeder 1962)

Gurgesiella atlantica és una espècie de peix de la família dels raids i de l'ordre dels raïformes.

Morfologia

• Els mascles poden assolir 50 cm de longitud total.^[5][6]

Reproducció

És ovípar^[7] i les femelles ponen càpsules d'ous, les quals presenten com unes banyes a la closca.^[8]

Hàbitat

És un peix marí i d'aigües profundes que viu entre 374–480 m de fondària.^[5][9]

Distribució geogràfica

Es troba a l'Oceà Atlàntic occidental: des del Mar Carib fins al Brasil.^{[5][10][11][12]}

Observacions

És inofensiu per als humans.^[5]

Referències

Bibliografia

• Anònim, 2001. Base de dades de la col·lecció de peixos del National Museum of Natural History (Smithsonian Institution). Smithsonian Institution - Division of Fishes.
• Compagno, L.J.V., 1999. Checklist of living elasmobranchs. p. 471-498. A W.C. Hamlett (ed.) Sharks, skates, and rays: the biology of elasmobranch fishes. Johns Hopkins University Press, Maryland, Estats Units.
• Eschmeyer, William N., ed. 1998. Catalog of Fishes. Special Publication of the Center for Biodiversity Research and Information, núm. 1, vol. 1-3. California Academy of Sciences. San Francisco, Califòrnia, Estats Units. ISBN 0-940228-47-5.
• Hulley, P.A., 1972. The family Gurgesiellidae (Chondrichthyes, Batoidei) with reference to Pseudoraja atlantica Bigelow & Schroeder. Copeia 1972(2): 356-359.
• McEachran, J.D. i K.A. Dunn, 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia (2):271-290.
• Mould, B., 1994. A world list of rays. The scientific nomenclature and distribution of the recent Batoidea (Batoidea, Elasmobranchii, Chondrichthyes). Universitat de Nottingham, Gran Bretanya. 82 p.
• Wu, H.L., K.-T. Shao i C.F. Lai (eds.), 1999. Latin-Chinese dictionary of fishes names. The Sueichan Press, Taiwan.

Enllaços externs

• AQUATAB
• World Register of Marine Species (anglès)
• IUCN (anglès)
• uBio (anglès)
• ITIS (anglès)

Gurgesiella atlantica, commonly known as the Atlantic pygmy skate, Atlantic finless skate, or simply the Atlantic skate,^[2] is a skate species in the family Gurgesiellidae. It lives in the western central and southwest Atlantic Ocean, from Nicaragua to Brazil. It grows to 49 centimetres (19 in) – 52 centimetres (20 in) long and is distinguished from other skates by its long, slender tail and absence of dorsal fins.

Description

The Atlantic pygmy skate has a width of 19.6 centimetres (7.7 in) and grows to a total length of about 49 centimetres (19 in) – 52 centimetres (20 in), with the exact length varying slightly between different sources.^[1][3] In comparison to other skates, it is medium in size. The species' upperbody is pale brown in color, sometimes containing spots, and its underside is brownish pink. It has a darker tail, typically a dark shade of brown, and a black caudal fin.^[3]

The species' tail is extremely long and slender for a skate and is completely absent of dorsal fins; these factors make the species easily distinguishable from other skate species in the area. It has a large number of denticles on its dorsal disc, completely covering it. Male specimens have thorns on their anterior disk as adults and females have them in the middle of their tail and disc. In addition, males adults have claspers, which are thin and long. It has a number of other notable characteristics as well, including a long caudal fin, long pelvic fines, large eyes, a short snout, and an arched mouth.^[3]

Behavior and habitat

The Atlantic pygmy skate exhibits oviparity, laying its eggs in pairs. Young obtain their nutrients through yolk as embryos. The shells on the species' eggs contain projections in the shape of horns. It is a demersal fish, living at the bottom of the sea floor.^[4][3] According to the International Union for Conservation of Nature (IUCN) it is found in waters 247 metres (810 ft) – 960 metres (3,150 ft) in depth,^[1] although FishBase states that it has a much more restricted range of 374 metres (1,227 ft) – 480 metres (1,570 ft).^[4]

Distribution

The Atlantic pygmy skate lives in the Atlantic Ocean, with its distribution ranging as far north as Nicaragua and as far south as northern Brazil. In total, it covers the countries of Bolivia, Brazil, Colombia, Costa Rica, Nicaragua, Panama, and Venezuela.^[1] The species is bathydemersal and lives on the continental slope.^[4] Little is known about the species' population and threats; therefore, no conservation actions are currently taking place for the species. It is listed as least concern by IUCN.^[1][5]

References

Gurgesiella atlantica es una especie de peces de la familia de los Rajidae en el orden de los Rajiformes.

Morfología

Los machos pueden llegar alcanzar los 50 cm de longitud total.^[1]​^[2]​

Reproducción

Es ovíparo y las hembras ponen huevos envueltos en una cápsula córnea.^[3]​^[4]​

Hábitat

Es un pez marino y de aguas profundas que vive entre 374-480 m de profundidad.

Distribución geográfica

Se encuentra en el Océano Atlántico occidental: desde el Mar Caribe hasta el Brasil.

Observaciones

Es inofensivo para los humanos.

Referencias

Bibliografía

• Fritzsch, B. i P. Moller, 1995. A history of electroreception. p. 39-55. A: P. Moller (ed.) Electric fishes: history and behavior. Fish and Fisheries Series 17. Chapman & Hall, Londres.
• McEachran, J.D. i K.A. Dunn, 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia (2):271-290.
• Wu, H.L., K.-T. Shao i C.F. Lai (eds.), 1999. Latin-Chinese dictionary of fishes names. The Sueichan Press, Taiwán.

Gurgesiella atlantica Gurgesiella generoko animalia da. Arrainen barruko Rajidae familian sailkatzen da.

Erreferentziak

Kanpo estekak

• FishBase.org

Ikus, gainera

• Gurgesiella
• Rajidae

Gurgesiella atlantica is een vissensoort uit de familie van de Rajidae.^[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1962 door Bigelow & Schroeder.

• Pseudoraja atlantica Bigelow & Schroeder, 1962

• 1 Таксономия
• 2 Ареал
• 3 Описание
• 4 Биология
• 5 Взаимодействие с человеком
• 6 Примечания
• 7 Ссылки