(كوسه ها و سپرماهيان) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Raja: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335).
More on authors: Fricke & Al-Hassan.
Issue
The species does not belong to the genus Okamejei, evidenced e.g. by its overall appearance. Due to the lack of an adult male specimen, it is currently placed as incertae sedis in the general genus Raja (Ref. 101518).
Environment: milieu / climate zone / تغييرات عمق / distribution range
بوم شناسي
دريايي نزديك كف زي; تغييرات عمق 0 - 15 m (Ref. 58018). Subtropical
Western Indian Ocean.
Size / Weight / سن
بلوغ: Lm ? range ? - ? cm
Max length : 46.0 cm TL جنس نر / بدون خواص جنسي; (Ref. 13710)
Found in shallow water over soft substrate (Ref. 13710). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).
Life cycle and mating behavior
بلوغ | تولید مثل | تخم ریزی | تخم ها | Fecundity | توزاد ( لارو)
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)
وضعيت در فهرست قرمز IUCN (Ref. 130435: Version 2025-1)
خطر برای انسان ها
Harmless
استفاده انسانی
ماهي گيري – شيلات: از بی علاقه گی
ابزارها
گزارش های ويژه
بارگيری XML
منابع اينترنتي
Estimates based on models
Preferred temperature (مرجع
123201): 24.8 - 29.3, mean 27.1 °C (based on 151 cells).
Phylogenetic diversity index (مرجع
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00263 (0.00118 - 0.00585), b=3.26 (3.09 - 3.43), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trophic level (مرجع
69278): 3.6 ±0.6 se; based on size and trophs of closest relatives
جهندگی (مرجع
120179): پايين ، كم, كمينه زمان لازم براي دو برابر شدن جمعيت 5/4 – 14 سال (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (36 of 100).
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Nutrients (Ref.
124155): Calcium = 43.4 [6.6, 211.2] mg/100g; Iron = 0.932 [0.247, 2.688] mg/100g; Protein = 18.7 [15.4, 21.8] %; Omega3 = 0.592 [0.171, 2.143] g/100g; Selenium = 12 [3, 41] μg/100g; VitaminA = 13 [4, 38] μg/100g; Zinc = 0.712 [0.330, 1.286] mg/100g (wet weight);
