Lớp phụ Cá sụn (cá mập và cá đuối) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Leucoraja: Greek, leykos = white + Latin, raja = a fish, Raja sp. (Ref. 45335).
Environment: milieu / climate zone / Mức độ sâu / distribution range
Sinh thái học
Biển Tầng đáy biển sâu; Mức độ sâu 60 - 800 m (Ref. 106604). Deep-water; 42°N - 36°N, 2°W - 16°E
Mediterranean Sea: endemic to the coasts of Tunisia, Malta and a single record from Italy; rare off Algeria.
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Chín muồi sinh dục: Lm ? range ? - ? cm
Max length : 52.0 cm TL con đực/không giới tính; (Ref. 125195); 45.0 cm TL (female)
Feed on crustaceans mainly amphipods (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). About 10-56 eggs are laid per individual annually (Ref. 41305, 41314).
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Breeds throughout the year, but ripe females observed mainly in spring and autumn (Ref. 3167). 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: Version 2025-1)
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Tài liệu tham khảo
123201): 13.1 - 14.6, mean 14 °C (based on 23 cells).
Phylogenetic diversity index (Tài liệu tham khảo
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00229 (0.00142 - 0.00370), b=3.21 (3.07 - 3.35), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
Mức dinh dưỡng (Tài liệu tham khảo
69278): 3.3 ±0.53 se; based on food items.
Thích nghi nhanh (Tài liệu tham khảo
120179): thấp, thời gian nhân đôi của chủng quần tối thiểu là 4.5 - 14 năm (Fec=10).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (41 of 100).
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Nutrients (Ref.
124155): Calcium = 6.32 [0.98, 122.77] mg/100g; Iron = 0.346 [0.033, 4.702] mg/100g; Protein = 15.1 [13.0, 17.2] %; Omega3 = 0.455 [0.180, 1.150] g/100g; Selenium = 14.5 [2.5, 68.7] μg/100g; VitaminA = 5.07 [0.37, 64.27] μg/100g; Zinc = 0.329 [0.023, 3.815] mg/100g (wet weight);
