Elasmobranchii (tubarões e raias) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Raja: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335); straeleni: Named after V. Van Straelen, director of IRSNB, Belgium (Ref. 377).
Eponymy: Professor Victor Émile van Straelen (1889–1964) was a Belgian geologist, palaeontologist, carcinologist and naturalist. [...] (Ref. 128868), visit book page.
More on author: Poll.
Ambiente: milieu / zona climática / intervalo de profundidade / gama de distribuição
Ecologia
marinhas demersal; oceanódromo; intervalo de profundidade 80 - 800 m (Ref. 11284), usually 100 - 300 m (Ref. 26999). Tropical; 15°N - 30°S
Eastern Atlantic: Rio de Oro, Western Sahara to South Africa.
Tamanho / Peso / Idade
Maturidade: Lm ?  range ? - ? cm
Max length : 70.0 cm TL macho/indeterminado; (Ref. 26999); 67.0 cm TL (female); peso máx. Publicado: 1.4 kg (Ref. 377); peso máx. Publicado: 1.4 kg
Descrição breve
Chaves de identificação | Morfologia | Morfometria
A black-spotted skate with a blunt, angular snout, a long, stout tail, and a broad angular disc; strong thorns on upper surface of disc and tail at all stages, sometimes on underside in large individuals (Ref. 5578). Brown to grey dorsally, with small to large black spots, whorls and blotches; many with gold and black, traversely oblong eyespot on each pectoral base; white ventrally with no dark pores (Ref. 5578). Juveniles have no dark spots above (Ref. 2708).
Body shape (shape guide): other.
Found in shallow enclosed bays and on the slope (Ref. 5578). Feeds on invertebrates, bony fishes and fish offal. Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205). Caught by shore and ski-boat anglers and by hake trawlers. Pectoral fins sold as 'skate wings' (Ref. 5578). Undergoes regular migration, towards the coast during the warm season and towards deep waters in winter (Ref. 5377).
Ciclo de vida e comportamento de acasalamento
Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).
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. 130435: Version 2025-2 (Global))
Ameaça para o homem
Harmless
Utilização humana
Pescarias: espécies comerciais; peixe desportivo: sim
Ferramentas
Relatórios especiais
Descarregue XML
Fontes da internet
Estimativas baseadas em modelos
Temperatura preferida (Ref.
123201): 10.2 - 15.7, mean 12.3 °C (based on 76 cells).
Índice de diversidade filogenética (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00372 (0.00231 - 0.00597), b=3.20 (3.07 - 3.33), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
Nível Trófico (Ref.
69278): 4.0 ±0.62 se; based on food items.
Resiliência (Ref.
120179): Baixo, tempo mínimo de duplicação da população 4,5 - 14 anos (Fec assumed to be <100).
Vulnerabilidade da pesca (Ref.
59153): Moderate to high vulnerability (48 of 100).
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