Elasmobranchii (tubarões e raias) (sharks and rays)
(Skates and rays) > Rajidae
Etymology: Raja: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
; marinhas demersal; intervalo de profundidade ? - 100 m (Ref. 4426). Temperate; 55°N - 24°N, 16°W - 1°W
Eastern Atlantic: southwestern England and Ireland to Rio de Oro in Western Sahara; absent from the North Sea and the Mediterranean.
Length at first maturity / Tamanho / Peso / Idade
Maturity: Lm 74.0, range 73 - ? cm
Max length : 87.0 cm TL macho/indeterminado; (Ref. 6014); peso máx. Publicado: 4.5 kg (Ref. 4699)
Espinhos dorsais (total): 0; Espinhos anais 0; Raios anais moles: 0. Eyes conspicuously small; dorsal fins close-set, no thorns between; upper surface predominantly spinulose, underside almost smooth in young, but head and centre of disc prickly in larger specimens; orbital thorns separate, a regular row of about 50 thorns from nape to first dorsal fin; upper surface greyish, olive to light brown with light blotches and long bands, underside white (Ref. 3167).
Found on sandy bottoms, from inshore waters to about 100 m in tidal areas (Ref. 3167). Feed on fishes (Ref. 3167). Oviparous. Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205). Eggs are oblong capsules with stiff pointed horns at the corners deposited in sandy or muddy flats (Ref. 205). Egg capsules are 6.6-10.0 cm long and 4.1-6.3 cm wide (Ref. 41250). About 54-61 eggs are laid by an individual in a year (Ref. 41250).
Oviparous (Ref. 3167). Paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205).
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)
Categoria na Lista Vermelha da IUCN (Ref. 123251)
CITES (Ref. 123416)
Ameaça para o homem
Pescarias: pouco comercial; peixe desportivo: sim
ReferênciasAquaculturaPerfil para aquaculturaEstirpesGenéticaFrequência dos alelosHereditariedadeDoençasProcessamentoNutrientsMass conversion
Fontes da internet
Estimates based on models
Preferred temperature (Ref. 115969
): 10.4 - 15.4, mean 12 °C (based on 138 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00490 (0.00313 - 0.00765), b=3.29 (3.17 - 3.41), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245
Nível Trófico (Ref. 69278
): 3.9 ±0.2 se; based on diet studies.
Resiliência (Ref. 120179
): Baixo, tempo mínimo de duplicação da população 4,5 - 14 anos (Fec= 54-61).
Vulnerabilidade (Ref. 59153
): Moderate to high vulnerability (53 of 100) .
Nutrients (Ref. 124155
): Calcium = 15.1 [1.9, 87.9] mg/100g ; Iron = 0.242 [0.044, 0.932] mg/100g ; Protein = 16.9 [14.1, 19.1] % ; Omega3 = 0.931 [0.404, 2.266] g/100g ; Selenium = 15.9 [3.6, 58.8] μg/100g ; VitaminA = 7.98 [1.87, 33.24] μg/100g ; Zinc = 0.392 [0.103, 1.432] mg/100g (wet weight);