ইলাসমোব্রাঙ্কি (হাঙ্গর এবং রে) (sharks and rays) >
Squatiniformes (Angel sharks) >
Squatinidae (Angel sharks)
Etymology: Squatina: Latin for skate, which angel sharks superficially resemble, presumably tautonymous with Squalus squatina Linnaeus 1758 (no species mentioned). (See ETYFish); aculeata: Latin for sharp-pointed, referring to large thorns on head and along back. (See ETYFish).
More on author: Cuvier.
Environment: milieu / climate zone / depth range / distribution range
বাস্তুসংস্থান
সামুদ্রিক তলদেশ বিহারী; গভীরতার পরিসীমা 30 - 500 m (Ref. 247). Subtropical; 43°N - 19°S, 18°W - 30°E
Eastern Atlantic: western Mediterranean, Morocco, Senegal, Guinea to Nigeria, Gabon to Angola.
Length at first maturity / আকৃতি / ওজন / Age
Maturity: Lm ?, range 124 - ? cm
Max length : 188 cm TL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 247); common length : 100.0 cm TL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 26999); সবের্াচ্চ প্রকাশিত ওজন : 40.0 kg (Ref. 128028)
Found mainly on muddy bottom (Ref. 26999). Feeds on small sharks and jacks. Ovoviviparous (Ref. 50449). Utilized dried salted and fresh for human consumption; liver oil and hide also utilized (Ref. 247).
Life cycle and mating behavior
Maturities | প্রজনন | Spawnings | Egg(s) | Fecundities | শুককীট
Ovoviviparous, embryos feed solely on yolk (Ref. 50449).
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)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
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ইন্টারনেট সুত্র
Estimates based on models
Preferred temperature (Ref.
123201): 13.1 - 17.2, mean 15.2 °C (based on 65 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00676 (0.00293 - 0.01558), b=3.07 (2.88 - 3.26), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
ট্রফিক পর্যায়ে (Ref.
69278): 4.0 ±0.4 se; based on diet studies.
স্থিতিস্থাপক (Ref.
120179): নিম্ন/ , সর্বনিম্ন প্রজন দ্বিগুনের সময় ৪.৪-১৪ বৎসর (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
Nutrients (Ref.
124155): Calcium = 13.9 [3.0, 67.9] mg/100g; Iron = 0.738 [0.191, 2.174] mg/100g; Protein = 19.7 [17.7, 21.7] %; Omega3 = 0.371 [0.168, 0.804] g/100g; Selenium = 33.5 [9.7, 99.1] μg/100g; VitaminA = 9.1 [3.3, 26.2] μg/100g; Zinc = 0.41 [0.20, 0.74] mg/100g (wet weight);