أشلاق (القروش و الشفانين) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Carcharhinidae (Requiem sharks)
Etymology: Carcharhinus: karcharos (Gr.), sharp or jagged; rhinus, an ancient name for sharks, from rhine (Gr.), rasp, both words alluding to a shark's jagged, rasp-like skin. (See ETYFish); plumbeus: Latin for “of lead,” i.e., lead-colored, referring to its gray-brown coloration above. (See ETYFish).
More on author: Nardo.
Environment: milieu / climate zone / depth range / distribution range
البيئة
بحري; مياه مخلوطة قاعية التغذية و المعيشة; محيطية (Ref. 51243); نطاق العمق 0 - 500 m (Ref. 100719), usually 20 - 65 m (Ref. 55188). Subtropical; 23°C - 27°C (Ref. 244); 45°N - 41°S, 98°W - 154°W (Ref. 55188)
Widespread in tropical and warm-temperate waters worldwide.
Length at first maturity / الحجم / وزن / العمر
Maturity: Lm 166.3, range 126 - 183 cm
Max length : 300 cm TL ذكر/ مختلط الجنس; (Ref. 124786); common length : 200 cm TL ذكر/ مختلط الجنس; (Ref. 9987); أعلا وزن تم نشرة: 117.9 kg (Ref. 4699); العمر: 34 سنين (Ref. 92315)
الأشواك الظهرية (المجموع) : 0; شوكة شرجية: 0. A stout shark with a moderately long, rounded snout, high, triangular, saw-edged upper teeth, and an interdorsal ridge; 1st dorsal fin very large and erect (Ref. 5578). Grey-brown or bronzy with no prominent markings, white below (Ref. 5578). Fins plain or with slightly dusky tips (Ref. 5485).
Found inshore and offshore, on continental and insular shelves and adjacent deep water (Ref. 244). Common at bays, river mouths and in harbors; avoids sandy beaches and the surf zone, coral reefs and rough bottom, and surface waters (Ref. 244). Coastal-pelagic, but usually bottom associated at 1-280 m (Ref. 58302). Sometimes in oceanic waters (Ref. 9997). Known to make extended seasonal migrations in some parts of its range (Ref. 6871). Feeds mainly on bony fishes, also small sharks, cephalopods, and shrimps (Ref. 5578), rays and gastropods (Ref. 5213). Youngs feed heavily on crustaceans such as blue crabd and mantis shrimp (Ref. 93252). Viviparous (Ref. 50449). Sexual dimorphism is evident in thickness of skin layer of maturing and adult females (Ref. 49562). Females live as long as 21 year; males 15 years (Ref. 27549). Populations are segregated by age. Young readily kept in aquaria (Ref. 244). Utilized for human consumption, for leather and oil (Ref. 244). Marketed fresh, smoked, dried-salted and frozen; fins are valued for soup (Ref. 9987). Used in Chinese medicine (Ref. 12166). Records to 300 cm TL uncertain (Ref. 9997). TL to 300 cm (Ref. 26938). Angling: an inshore fish and a good light-tackle fighter (Ref. 84357).
Viviparous (Ref. 26281), placental (Ref. 50449), 1-14 pups in a litter; 56-75 cm at birth (Ref. 2334); gestation period of 12 months (Ref.58048). Distinct pairing with embrace (Ref. 205). Sexual dimorphism is evident in the thicker skin layer of maturing and adult females (Ref. 49562). This thickened skin may serve as protection from the 'bites' the female species receive from the males during precopulation and in the rugged conditions of the rock and coral environment where they live (Ref. 49562). Pups are born from Feb. to April in Northeastern Taiwan (Ref. 37027).
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 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)
IUCN Red List Status (Ref. 130435)
استخدامات بشرية
مصائد: تجاري; لعبة سمكه: نعم
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Preferred temperature (Ref.
123201): 16.6 - 28.9, mean 27 °C (based on 3224 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00447 (0.00359 - 0.00555), b=3.09 (3.05 - 3.13), in cm total length, based on LWR estimates for this species (Ref.
93245).
مستوى غذائي (Ref.
69278): 4.5 ±0.0 se; based on diet studies.
المرونه (Ref.
120179): منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (rm=0.028; K=0.05-0.09; tm=12-16; tmax=34; Fec=5-12).
Prior r = 0.07, 95% CL = 0.05 - 0.10, Based on 1 full stock assessment.
Fishing Vulnerability (Ref.
59153): Very high vulnerability (87 of 100).
Climate Vulnerability (Ref.
125649): High to very high vulnerability (66 of 100).
Nutrients (Ref.
124155): Calcium = 7.18 [1.02, 43.19] mg/100g; Iron = 0.476 [0.121, 1.485] mg/100g; Protein = 21.4 [18.5, 23.8] %; Omega3 = 0.302 [0.118, 0.686] g/100g; Selenium = 28.7 [8.8, 93.0] μg/100g; VitaminA = 19.2 [5.6, 67.9] μg/100g; Zinc = 0.54 [0.25, 1.03] mg/100g (wet weight);
