أشلاق (القروش و الشفانين) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
البيئة: الوسط / المنطقة المناخية / نطاق العمق / نطاق التوزيع
البيئة
بحري القاع; نطاق العمق 25 - 150 m (Ref. 106604). Temperate
Northwest Pacific: Japan to the East China Sea.
الحجم / وزن / العمر
النضج: Lm ?  range ? - ? cm
Max length : 45.0 cm TL ذكر/ مختلط الجنس; (Ref. 106604)
Sublittoral on sandy mud bottoms (Ref. 11230). Depth range given by H. Ishihara (pers.comm. 07/07). Feed on invertebrates and bony fishes (Ref. 9908). 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 4.9-5.4 cm long and 2.5-2.9 cm wide (Ref. 41249, 41253).
دورة الحياة وسلوك التزاوج
النضج | التكاثر | وضع البيض | بيض | الخصوبة | اليرقات
Oviparous (Ref. 9908). 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)
حالة القائمة الحمراء للاتحاد الدولي لحفظ الطبيعة والموارد الطبيعية (Ref. 130435: Version 2025-2 (Global))
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مؤشر التنوع الشُعبي الوراثي (مرجع 82804) |
PD50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00309 (0.00144 - 0.00663), b=3.24 (3.07 - 3.41), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
مستوى غذائي (مرجع 69278) |
4.0 ±0.62 se; based on food items. |
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Generation time |
7.2 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies. |
المرونه (مرجع 120179) |
منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (Fec assumed to be <100). |
ضعف الصيد (Ref. 59153) |
Moderate to high vulnerability (54 of 100). 🛈 |
المغذيات (Ref. 124155) |
Calcium = 17.6 [3.0, 82.8] mg/100g; Iron = 0.296 [0.079, 0.831] mg/100g; Protein = 17.2 [14.5, 19.8] %; Omega3 = 0.975 [0.309, 3.534] g/100g; Selenium = 7.51 [2.32, 23.13] μg/100g; VitaminA = 21.4 [6.5, 67.6] μg/100g; Zinc = 0.54 [0.26, 0.98] mg/100g (wet weight); |