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Squaliformes (Sleeper and dogfish sharks) >
Somniosidae (Sleeper sharks)
Etymology: Centroscymnus: centr[um] (L.), prickle or sharp point, referring to spines on both dorsal fins; scymnus, an ancient name for some kind of shark, derived from a Greek word meaning young animal, cub or whelp (See ETYFish); coelolepis: coelo-, from koilos (Gr.), hollow; lepis (Gr.), scale, referring to its concave skin denticles (See ETYFish).
البيئة: الوسط / المنطقة المناخية / نطاق العمق / نطاق التوزيع
البيئة
بحري قاعية المعيشة; نطاق العمق 128 - 3700 m (Ref. 55584), usually 400 - 2000 m (Ref. 35388). Deep-water; 5°C - 13°C (Ref. 117245); 75°N - 61°S, 98°W - 147°W
Western Atlantic: Grand Banks to Delaware, USA; Cuba (Ref. 26340). Eastern Atlantic: Iceland south along Atlantic slope to the southwestern Cape coast of South Africa; also western Mediterranean. Western Pacific: off Japan, New Zealand, and Australia (Ref. 6871, 31367). Western Indian Ocean: Seychelles (Ref. 76802).
الطول عند النضج الأول / الحجم / وزن / العمر
النضج: Lm 101.8, range 95 - 110 cm
Max length : 121 cm TL ذكر/ مختلط الجنس; (Ref. 122636); common length : 92.0 cm TL ذكر/ مختلط الجنس; (Ref. 247); أعلا وزن تم نشرة: 10.1 kg (Ref. 122636)
الأشواك الظهرية (المجموع) : 2; شوكة شرجية: 0. Dorsal fins with very small spines, very short snout, lanceolate upper teeth and bladelike lower teeth with short, oblique cusps, stocky body that does not taper abruptly from pectoral region, very large lateral trunk denticles with smooth, circular, acuspidate crowns in adults and subadults (Ref. 247). Uniformly golden brown to dark brown in color (Ref. 6871).
Body shape (shape guide): elongated.
Found on continental slopes and abyssal plains (Ref. 6871). Feeds mainly on fish (including sharks) and cephalopods (Ref. 6871), also gastropods and cetacean meat (Ref. 5578). Ovoviviparous (Ref. 205), with 13 to 29 young per litter, born at 27-31 cm (Ref. 26346); 32-35 cm TL in North Atlantic (Ref. 98315). Utilized as fishmeal, dried and salted for human consumption, or as a source of squalene (Ref. 6871).
Ovoviviparous (Ref. 6871), with 13 to 29 young per litter (Ref. 26346). Born at 27-31 cm (Ref. 26346). Distinct pairing with embrace (Ref. 205).
Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)
حالة القائمة الحمراء للاتحاد الدولي لحفظ الطبيعة والموارد الطبيعية (Ref. 130435: Version 2025-2 (Global))
استخدامات بشرية
مصائد: غير مهمة تجارياً
أدوات
تقارير خاصة
تنزيل XML
مصادر علي الأنترنت
تقديرات تستند إلى النماذج
درجة الحرارة المفضلة (مرجع
123201): 0.8 - 10.3, mean 3.9 °C (based on 2755 cells).
مؤشر التنوع الشُعبي الوراثي (مرجع
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00297 - 0.00510), b=3.12 (3.05 - 3.19), in cm total length, based on LWR estimates for this species (Ref.
93245).
مستوى غذائي (مرجع
69278): 4.5 ±0.1 se; based on diet studies.
المرونه (مرجع
120179): منخفظ جدا, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع أكثر من 14 سنة (Fec=13-29).
Prior r = 0.03, 95% CL = 0.02 - 0.05, Based on 1 full stock assessment.
ضعف الصيد (Ref.
59153): High to very high vulnerability (73 of 100).
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قابلية التأثر بالمناخ (Ref.
125649): Moderate vulnerability (38 of 100).
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المغذيات (Ref.
124155): Calcium = 4.91 [1.03, 28.49] mg/100g; Iron = 0.266 [0.063, 0.926] mg/100g; Protein = 20.1 [17.1, 22.2] %; Omega3 = 0.308 [0.110, 0.995] g/100g; Selenium = 20.9 [5.9, 65.6] μg/100g; VitaminA = 14.7 [2.8, 82.3] μg/100g; Zinc = 0.291 [0.136, 0.596] mg/100g (wet weight); based on
nutrient studies.