Rajella ravidula, Smoothback skate

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Rajella ravidula (Hulley, 1970)

Smoothback skate
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Native range | All suitable habitat | Point map | Year 2100
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Rajella ravidula   AquaMaps   Data sources: GBIF OBIS
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Image of Rajella ravidula (Smoothback skate)
No image available for this species;
drawing shows typical species in Rajidae.

Classification / Names Nombres comunes | Sinónimos | Catalog of Fishes(Género, Especie) | ITIS | CoL | WoRMS | Cloffa

Elasmobranquios (tiburones y rayas) (sharks and rays) > Rajiformes (Skates and rays) > Rajidae (Skates)
Etymology: Rajella: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range Ecología

; marino batidemersal; rango de profundidad 496 - 1477 m (Ref. 106604). Deep-water

Distribución Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | Faunafri

Southeast Atlantic: known only from the three type specimens collected from off the west coast of South Africa and one record from off Morocco.

Tamaño / Peso / Age

Maturity: Lm ?  range ? - ? cm
Max length : 79.2 cm TL macho / no sexado; (Ref. 106604)

Short description Morfología | Morfometría

Long snout, small eyes, and a thick disc; tail about as long as body; moderate-sized conspicuous light thorns in 2 prominent rows from shoulders to 1st dorsal fin, no or few mid-dorsal thorns, and no thorns on snout (Ref. 5578). Medium grey to purplish-brown dorsally, white ventrally but dusky on disc margins, around vent and on underside of tail (Ref. 5578).

Biología     Glosario (por ej. epibenthic)

Inhabits the upper slope (Ref. 5578). Minimum depth reported taken from Ref. 5578. Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).

Life cycle and mating behavior Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva

Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).

Main reference Upload your references | Referencias | Coordinador : McEachran, John | Colaboradores

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. (Ref. 27314)

IUCN Red List Status (Ref. 125652)

  Least Concern (LC) ; Date assessed: 24 April 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

Más información

Países
Áreas FAO
Ecosistemas
Ocurrencias, apariciones
Introducciones
Stocks
Ecología
Dieta
componentes alimenticios
consumo de alimento
Ración
Nombres comunes
Sinónimos
Metabolismo
Despredadores
Ecotoxicología
Reproducción
Madurez
Puesta
Agregación para la puesta
Fecundidad
Huevos
Egg development
Age/Size
Crecimiento
Length-weight
Length-length
Length-frequencies
Morfometría
Morfología
Larva
Dinámica larvaria
Reclutamiento
Abundancia
BRUVS
Referencias
Acuicultura
Perfil de acuicultura
Razas
Genética
Frecuencias de alelos
heritabilidad
Enfermedades
Procesamiento
Nutrients
Mass conversion
Colaboradores
Imágenes
Stamps, Coins Misc.
Sonidos
Ciguatera
Velocidad
Tipo de natación
Superficie branquial
Otolitos
Cerebros
Visión

Herramientas

Special reports

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Fuentes de Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Género, Especie | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Árbol de la vida | Wikipedia: Go, búsqueda | World Records Freshwater Fishing | Expediente Zoológico

Estimates based on models

Preferred temperature (Ref. 115969): 3.8 - 7.9, mean 6 °C (based on 59 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00302 (0.00143 - 0.00636), b=3.23 (3.06 - 3.40), in cm total length, based on LWR estimates for this Subfamily-BS (Ref. 93245).
Nivel trófico (Ref. 69278):  3.7   ±0.4 se; based on size and trophs of closest relatives
Resiliencia (Ref. 120179):  Bajo, población duplicada en un tiempo mínimo de 4.5-14 años (Fec assumed to be <100).
Fishing Vulnerability (Ref. 59153):  Moderate to high vulnerability (52 of 100) .
Climate Vulnerability (Ref. 125649):   (0 of 100) .