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Rostroraja alba

(White Bottle-Nose Skate)

Overview

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Family : Skates ; Inhabit shelf and slope waters [1]. Found on sand and rock-sand bottom [2]. A bottom-predator of bony fishes, other elasmobranchs, fish offal , crabs, shrimps, mysids , octopi, and cuttlefish [3]. Minimum depth reported taken from Ref. 4426. Maximum length for female is 202 cm[4]. Oviparous . Distinct pairing with embrace. Young may tend to follow large objects, such as their mother[5]. Eggs are oblong capsules with stiff pointed horns at the corners deposited in sandy or muddy flats[5]. Egg capsules are 12.5-18.3 cm long and 10.0-13.9 cm wide[6]. About 55-156 eggs are produced per individual annually[6].

Endangered

Threat status

Common Names

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Click on the language to view common names.

Common Names in Afrikaans:

Spiesneus, Spiesneus Rog, Spiesneus-Rog

Common Names in Albanian:

Raxhe

Common Names in Catalan:

Rajada Blanca

Common Names in Croatian:

Volina Bjelica

Common Names in Danish:

Spidsrokke

Common Names in Dutch:

Witte Rog

Common Names in English:

Bordered Ray, Bordered Skate, Bottlenose, Bottlenose Skate, Bottlenosed Skate, Burton Skate, Owl Skate, Spearnose Skate, White Bordered Skate, White Bottle-Nose Skate, White Skate, White-Bellied Skate

Common Names in Finnish:

Pullonokkarausku

Common Names in French:

Blanquette, Fumat Nègre, Fumat Ngre, Mirayet, Petit Raie-Museau, Petite Raie-Museau, Raie Blanche, Raie Blanche Zone Brune, Raie Blanche à Zone Brune, Raie Blanche Bordèe, Raie Blanche Bordée, Raie Blanche Borde

Common Names in German:

Bandrochen, Gerandeter Rochen, Gerändeter Rochen, Gerndeter Rochen, Gesäumter Glattrochen, Gesumter Glattrochen, Randrochen, Spitzrochen, Weißrochen, Weirochen

Common Names in Greek:

Βάτος, Λευκόβατος, Ράγια, Ράτσα, Ρίνα, Σαλάχι, Βάτος, Λευκόβατος, Ράτσα, Ράγια, Ρίνα, Σαλάχι, Lefkovatos, Salahi

Common Names in Greek, Modern (1453):

Λευκόβατος, Lefkovatos, Salahi

Common Names in Italian:

Baraccoletta, Baracoleta, Bbaròchëlë De Fiure, Bbarchl De Fiure, Chiamita, Mezzaraja, Moro, Picara Liscia, Picaredda, Pichira Liscia, Raja Liscia, Rasa Capusinha, Razza Bianca, Vacche

Common Names in Maltese:

Hamiema

Common Names in Mandarin Chinese:

矛吻鰩, 緣鰩, 矛吻鰩, 矛吻鳐, 緣鰩, 缘鳐

Common Names in Polish:

Raja Siwa

Common Names in Portuguese:

Raia Tairoga, Raia-Branca, Raia-Tairoga, Raia-Teiroga, Tairoga

Common Names in Rumanian:

Vulpe alba, Vulpe Alba

Common Names in Serbian:

Raza Bjelica

Common Names in Spanish:

Cavach, Clavel, Ilisó, Ilis, Raya Blanca, Raya Bramante, Raya Picuda, Rayón, Rayn

Common Names in Swedish:

Grårocka, Grrocka, Spetsnosad Rocka

Common Names in Turkish:

Akvatoz Baligi, Vatoz

Description

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Family Rajidae

Benthic rays occurring in all oceans, from Arctic to Antarctic waters and from shallow coastal shelfs to abyssal regions; rare in tropical shallow waters or near coral reefs; some species enter brackish waters. Disc quadrangular to rhomboidal . Mouth transversed to arched, with numerous teeth. Five pairs of ventral gill slits . Tail very slender, with lateral folds, usually 2 reduced dorsal fins and a reduced caudal fin. Electric organs weak, developed from caudal muscles. Skin prickly in most species, the prickles often in a row along midline of dorsal. Oviparous ; eggs in a horny capsule with four long tips . A reversal to egg-laying from live-bearing was observed in this group based on fossil records [7]. Skates feed on other benthic organisms. Skate wings are considered good eating. The following subgenus have been elevated to the genus level: Amblyraja, Dipturus, Fenestraja, Leucoraja, Okamejei, Rajella, Rostroraja[8].The family Rajidae belongs to the Class Elasmobranchii (sharks and rays) and the Order Rajiformes. It contains 14 genera and 200 species. It may be found in Marine and Brackish environments and is primarily Marine. Members of this family are not used in the aquarium trade. Reproductively, most members of this family are nonguarders. The main mode of swimming of adult fish in this family is rajiform. Compared with other fish, the activity level of this family tends to be normal. Members of this family have been dated back to the Cretaceous period. Etymology of this family name : Latin, raja = ray

Habitat

Typically found in water with a depth of 0 to -4,300 meters (0 to -14,108 feet).[9]

Biome: Saltwater . Demersal .

Ecology: This is a benthic species of sandy and detrital bottoms from coastal waters to the upper slope region between about 40 to 400 m and exceptionally down to 500 m (Capape 1976, Stehmann and Burkel 1984, Serena 2005). Du Buit 1974 reports this species to be more prevalent in rocky habitats . Little is known of this species’ life history and ecology.

Estimates of size at maturity are 130 cm (males) and 120 cm (females) (Capape 1976). Maximum recorded size is 200 cm, even if is common between 60 and 150 cm of total length (Bauchot 1987). Gestation period is 15 months and females produce between 55 to 156 ova per year, egg cases are 160 to 200 cm in length and 130 to 150 cm in width (Stehmann and Burkel 1984, Serena 2005). Age at maturity, longevity , size at birth, average reproductive age, reproductive periodicity, annual rate of population growth and natural mortality are all unknown for this skate.

The white skate feeds on all kinds of bottom dwelling animals (Stehmann and Burkel 1984), especially fish, crustaceans and cephalopods (Bauchot 1987).


List of Habitats:10.1Marine Oceanic - Epipelagic (0-200m)

Taxonomy

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Ambiguous Synonyms

  1. Raia bicolor Risso, 1827

Unambiguous Synonyms

  1. Raia alba Lacepde, 1803
  2. Raia rostellata Risso, 1810
  3. Raja alba Lac épède, 1803
  4. Raja alba Lacepde, 1803
  5. Raja bicolor Shaw, 1804
  6. Raja bramante Sassi, 1846
  7. Raja marginata Lacepde, 1803
  8. Raja rostellata Risso, 1810
  9. Rostroraja alba /i> (Lacépède, 1803)

Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: Group expert : McEachran J., Data last modified by FishBase 30-Sep-1999

Similar Species

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Members of the genus Rostroraja

ZipcodeZoo has pages for 1 species and subspecies in this genus:

R. alba (White Bottle-Nose Skate)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal December 20, 2007:

Identifiers

Footnotes

  1. Stehmann, M. (1990). Rajidae. p. 29-50. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic. Junta Nacional de Investigaao Cientifica e Tecnolgica, Lisbon, Portugal. Vol. 1. [back]
  2. Brito, A. (1991). Catalogo de los pesces de las Islas Canarias. Francisco Lemus, la Laguna. 230 p. [back]
  3. Compagno, L.J.V., D.A. Ebert and M.J. Smale (1989). Guide to the sharks and rays of southern Africa. New Holland (Publ.) Ltd., London. 158 p. [back]
  4. Postel E. and Du Buit M. H. (1964). Liste des poissons observs la crie de Concarneau en fin Juillet-dbut Aot 1964. Tailles maximales enregistres. Bulletin de la Socit Scientifique de Bretagne 39: 113-117. [back]
  5. Breder, C.M. and D.E. Rosen (1966). Modes of reproduction in fishes. T.F.H. Publications, Neptune City, New Jersey. 941 p. [back]
  6. Bor, P. (2002). Egg-capsules of sharks and skates. www.rajidae.tmfweb.nl/rogtabel.html [back]
  7. Dulvy, N.K. and J.D. Reynolds (1997). Evolutionary transitions among egg-laying, live-bearing and maternal inputs in sharks and rays. Proc. R. Soc. Lond. B 264:1309-1315. [back]
  8. McEachran, J.D. and K.A. Dunn (1998). Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia 1998(2):271-290. [back]
  9. Mean = -170.020 meters (-557.808 feet), Standard Deviation = 384.500 based on 529 observations. Ocean depth information for each observation from British Oceanographic Data Centre. [back]
Last Revised: August 12, 2009