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Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Rajella: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335).
Issue
Specific name amended to R. leoparda in accordance with ICZN Article 34.2 by Weigmann et al., 2014 (Ref.96993).
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
Biển Tầng đáy biển sâu; Mức độ sâu 130 - 1920 m (Ref. 106604). Deep-water; - 36°S
Eastern Atlantic: off eastern and western South Africa to off Mauritania
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ?  range ? - ? cm
Max length : 95.0 cm TL con đực/không giới tính; (Ref. 106604)
Short description
Hình thái học | Sinh trắc học
Large skate with a moderately long snout, small eyes, and a flat disc; tail about as long as body; small inconspicuous, light thorns on upper surface including snout (Ref. 5578). Medium grey to brownish dorsally, often with dark spots; white or mottled with dusky patches ventrally (Ref. 5578).
Found in deeper shelf and slope waters (Ref. 4426). Feed on bottom crustaceans, dragonets, rattails, hake, lanternfish, sea pens, cuttlefish and polychaete worms (Ref. 5578). 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 7.4 cm long and 7.4 cm wide (Ref. 41249). Caught by hake trawlers (Ref. 5578).
Life cycle and mating behavior
Chín muồi sinh dục | Sự tái sinh sản | Đẻ trứng | Các trứng | Sự sinh sản | Ấu trùng
Oviparous, 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)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Các nghề cá: Tính thương mại
Thêm thông tin
Các tài liệu tham khảoNuôi trồng thủy sảnTổng quan nuôi trồng thủy sảnCác giốngDi truyềnElectrophoresesDi sảnCác bệnhChế biếnNutrientsMass conversion
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Estimates based on models
Preferred temperature (Ref.
123201): 4.1 - 11.9, mean 6.9 °C (based on 47 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00309 (0.00191 - 0.00501), b=3.33 (3.20 - 3.46), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Mức dinh dưỡng (Ref.
69278): 3.9 ±0.63 se; based on food items.
Thích nghi nhanh (Ref.
120179): thấp, thời gian nhân đôi của chủng quần tối thiểu là 4.5 - 14 năm (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): High vulnerability (58 of 100).
Nutrients (Ref.
124155): Calcium = 9.71 [1.80, 49.75] mg/100g; Iron = 0.404 [0.092, 1.262] mg/100g; Protein = 16.5 [13.7, 19.1] %; Omega3 = 0.644 [0.200, 2.420] g/100g; Selenium = 14.5 [3.8, 46.2] μg/100g; VitaminA = 13 [3, 56] μg/100g; Zinc = 0.299 [0.147, 0.566] mg/100g (wet weight);