أشلاق (القروش و الشفانين) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Amblyraja: Greek, amblys = darkness + Latin, raja, -ae = ray (Raja sp.) (Ref. 45335).
Eponymy: Professor Martin Doello-Jurado (1884–1948) was a marine biologist and malacologist, who was also interested in palaeontology. [...] (Ref. 128868), visit book page.
البيئة: الوسط / المنطقة المناخية / نطاق العمق / نطاق التوزيع
البيئة
بحري القاع; نطاق العمق 50 - 640 m (Ref. 114953). Subtropical; 35°S - 57°S, 78°W - 53°W (Ref. 114953)
Southeast Pacific: Chile (Ref. 27540, Ref. 114953). Southwest Atlantic: off Argentina (Ref. 26282) and Uruguay, including Falkland Islands (Ref. 58839, Ref. 114953).
الحجم / وزن / العمر
النضج: Lm ?  range ? - ? cm
Max length : 69.0 cm TL ذكر/ مختلط الجنس; (Ref. 114953)
Found on mid- and outer continental shelf and upper slope, occasionally caught deeper to 1000 m. Mainly feeds on benthic invertebrates and small bony fishes (Ref. 114953). 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 capsule measures 86.4 mm long and 56.2 mm wide (Ref. 41249). Hatches from egg case at ca. 9 cm TL (Ref. 114953).
دورة الحياة وسلوك التزاوج
النضج | التكاثر | وضع البيض | بيض | الخصوبة | اليرقات
Oviparous. Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205). 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)
حالة القائمة الحمراء للاتحاد الدولي لحفظ الطبيعة والموارد الطبيعية (Ref. 130435: Version 2025-2 (Global))
استخدامات بشرية
أدوات
تقارير خاصة
تنزيل XML
مصادر علي الأنترنت
تقديرات تستند إلى النماذج
مؤشر التنوع الشُعبي الوراثي (مرجع 82804) |
PD50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high]. |
|
Bayesian length-weight
|
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) |
4.1 ±0.2 se; based on size and trophs of closest relatives |
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 (50 of 100). 🛈 |