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Élasmobranches (requins et raies) (sharks and rays) > Rajiformes (Skates and rays) > Rajidae (Skates)
Etymology: Raja: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335).
More on author: Lowe.

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

marin bathydémersal; profondeur ? - 500 m. Deep-water; 33°N - 31°N

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Point map | Introductions | Faunafri

Eastern Atlantic: endemic to Madeira; possibly Azores. Nominal records from western Africa and the Canary Islands could not be verified and are probably misidentifications.

Taille / Poids / Âge

Maturity: L_m ? range ? - ? cm
Max length : 85.0 cm TL mâle / non sexé; (Ref. 2683); common length : 50.0 cm TL mâle / non sexé; (Ref. 2683)

Description synthétique Clés d'identification | Morphologie | Morphométrie

Épines dorsales (Total) : 0; Épines anales: 0. Upper surface wholly prickly, underside almost entirely prickly; orbital thorns separate, a regular row of 21-25 large thorns from nape to first dorsal fin; upper surface dark brown with a constant pattern of irregular light spots forming broad undulating transverse bands with narrower unspotted bands between, underside white, but grey on snout and broad dark margin to disc from behind midpoint of anterior margin, also blackish at tip of tail (Ref. 3167).

Feeds on all kinds of benthic animals (Ref. 3167). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larves

Oviparous (Ref. 3167). Paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).

Référence principale Upload your references | Références | Coordinateur : McEachran, John | Collaborateurs

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)

Statut dans la liste rouge de l'IUCN (Ref. 130435)

Vulnérable, voir Liste Rouge IUCN (VU) (D2); Date assessed: 11 December 2014

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

Harmless

Utilisations par l'homme

Pêcheries: commercial

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Trophic ecology
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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00269 (0.00124 - 0.00582), b=3.26 (3.09 - 3.43), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).

Niveau trophique (Ref. 69278): 3.5 ±0.37 se; based on food items.

Résilience (Ref. 120179): Faible, temps minimum de doublement de population : 4,5 à 14 années (Fec assumed to be <100).

Fishing Vulnerability (Ref. 59153): Moderate to high vulnerability (54 of 100).

Catégorie de prix (Ref. 80766): Medium.

Raja maderensis Lowe, 1838