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Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Rajella: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335).
More on author: Norman.
Environment: milieu / climate zone / depth range / distribution range
Ekologi
laut batidemersal; kisaran kedalaman 102 - 1207 m (Ref. 106604). Deep-water
Eastern Atlantic: off Mauritania to South Africa, probably throughout on the deep, middle and upper slope, even on outer shelf of Namibia and South Africa.
Size / Weight / umur
Maturity: Lm ?  range ? - ? cm
Max length : 75.0 cm TL jantan/; (Ref. 106604)
Found on the outer shelf and upper slope (Ref. 5578). Feeds on small crustaceans, squid and polychaete worms (Ref. 5578). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205). Taken by hake trawlers (Ref. 5578).
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)
Status IUCN Red List (Ref. 130435)
ancaman kepada manusia
Harmless
penggunaan manusia
informasi lanjut
AcuanBudidaya airprofil budidaya airStrainGenetikaElectrophoresesDiturunkanPenyakit-penyakitPengolahanNutrientsMass conversion
mitraGambarStamps, Coins Misc.Suara-suaraCiguateraKecepatanTipe renangArea insangOtolithsOtakPenglihatan / visi
Alat, peralatan
laporan khas
muat turun XML
Sumber internet
Estimates based on models
Preferred temperature (Ref.
123201): 4.6 - 11.8, mean 7.3 °C (based on 89 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00324 (0.00198 - 0.00529), b=3.22 (3.08 - 3.36), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Trophic level (Ref.
69278): 3.5 ±0.43 se; based on food items.
Daya lenting (Ref.
120179): Rendah, Waktu penggandaan populasi minimum 4.5 - 14 tahun (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (50 of 100).
Nutrients (Ref.
124155): Calcium = 9.41 [1.70, 47.02] mg/100g; Iron = 0.362 [0.086, 1.105] mg/100g; Protein = 16.6 [13.7, 19.2] %; Omega3 = 0.615 [0.183, 2.451] g/100g; Selenium = 15 [4, 49] μg/100g; VitaminA = 7.58 [1.88, 30.92] μg/100g; Zinc = 0.34 [0.17, 0.63] mg/100g (wet weight);