ইলাসমোব্রাঙ্কি (হাঙ্গর এবং রে) (sharks and rays) >
Hexanchiformes (Frill and cow sharks) >
Hexanchidae (Cow sharks)
Etymology: Notorynchus: Etymology not explained, presumably noto(s) (Gr.), back, possibly referring to posterior placement of single dorsal fin; rhynchus (L.), snout, possibly referring to broad, depressed snout (See ETYFish); cepedianus: -anus, Latin adjectival suffix that means, when attached to a name, “belonging to”: Bernard Germain Étienne de La Ville-sur-Illon, comte de [count of] La Cepède (also spelled as La Cépède, Lacépède and Lacepède, 1756-1825), author of Histoire Naturelle des Poissons (1798-1803) and Péron’s “illustrious master” (translation) in ichthyology (See ETYFish).
Eponymy: Bernard Germaine Etienne de la Ville, Comte de Lacépède (also spelled La Cepède) (1756– 1825), was a French naturalist and politician. [...] (Ref. 128868), visit book page.
পরিবেশ: পরিবেশ / জলবায়ু অঞ্চল / গভীরতার পরিসীমা / বিতরণ পরিসীমা
বাস্তুসংস্থান
সামুদ্রিক; ঈষৎ লোনা তলদেশ বিহারী; গভীরতার পরিসীমা 0 - 570 m (Ref. 26346), usually ? - 80 m (Ref. 5578). Subtropical; 56°N - 55°S, 131°W - 177°E (Ref. 54680)
Circumglobal: In tropical to temperate waters; except North Atlantic and Mediterranean Sea. Southwest Atlantic: southern Brazil to northern Argentina. Southeast Atlantic: Namibia to East London, South Africa (Ref. 5578). Western Pacific: southern Japan to New Zealand. Eastern Pacific: British Columbia, Canada to Chile. Record from India maybe erroneous.
প্রথম পরিপক্কতার সময় দৈর্ঘ্য / আকৃতি / ওজন / বয়স
পরিপক্কতা : Lm 200.0, range 192 - 208 cm
Max length : 300 cm TL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 5578); common length : 150 cm TL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 6077); সবের্াচ্চ প্রকাশিত ওজন : 107.0 kg (Ref. 9987); সর্বোচ্চ উলি্ল্লখিত বয়স : 49 বৎসর (Ref. 27952)
পৃষ্ঠীয় কাঁটা (মোট ) : 0; পায়ূ কাঁটা : 0; কশেরুকা : 123 - 157. A large seven-gilled cowshark (Ref. 5578) with a wide head, short and blunt snout, and fusiform body. Dorsal fin small, origin may vary from over insertion of pelvic fins to over free rear tips of pelvic fins. Anal fin smaller than dorsal fin. Tooth count 15-16/13. Reddish-brown to silvery-grey or olive-brown with numerous small black spots on body and fins; cream below (Ref. 5578).
Body shape (shape guide): elongated.
Found on the continental shelf, often in shallow water (Ref. 247). Occurs close inshore, in bays and estuaries (Ref. 6871), with larger individuals ranging into deeper waters offshore and deep channels in bays (Ref. 247). Usually cruising steadily and slowly near the bottom (sometimes in water as shallow as a meter), but sometimes at the surface (Ref. 247). Can dash at speed when attacking prey (Ref. 247). Feeds on anything, including other sharks, rays, chimaeras, bony fish, hagfish, dolphin and porpoise meat, seals, shark egg cases, sea snails and mammalian carrion, including rats and humans (Ref. 5578). Ovoviviparous (Ref. 50449), with 82 to 95 young in a litter (Ref. 31395). Aggressive when provoked, and regarded as potentially dangerous to people in open waters (Ref. 247). It has attacked divers in captivity and may be involved in a few shark attacks off California and South Africa (Ref. 247). Often caught by anglers from the shore (Ref. 6574). Utilized for human consumption, its skin for leather, and its liver as a source of oil (Ref. 247).
Ovoviviparous, embryos feeding solely on yolk (Ref. 50449), with number of young reaching 82 in a litter. Gravid females apparently drop their young in shallow bays. Size at birth between 40 (Ref. 26346) and 53 (Ref. 247) cm. Distinct pairing with embrace (Ref. 205). Gestation period 12 months. The reproductive cycle appears to be biennial (Ref. 45445).
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)
আইইউসিএন রেড লিস্টের অবস্থা (Ref. 130435: Version 2025-2 (Global))
মানুষের ব্যবহার
মৎস্য: বাণিজ্যিক; শিকারযোগ্য মাছ: হঁ্যা ; মৎস্যাধার / এ্যাকুয়ারিয়াম : পাবলিক এ্যাকুয়ারিয়াম
হাতিয়ার
বিশেষ প্রতিবেদন
XML ডাউনলোড করুন
ইন্টারনেট সুত্র
মডেলের উপর ভিত্তি করে অনুমান
পছন্দের তাপমাত্রা (সূত্র
123201): 7.5 - 19.2, mean 14.2 °C (based on 122 cells).
ফাইলোজেনেটিক বৈচিত্র্য সূচক (সূত্র
82804): PD
50 = 1.0391 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00224 (0.00096 - 0.00523), b=3.15 (2.95 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
ট্রফিক পর্যায়ে (সূত্র
69278): 4.7 ±0.2 se; based on diet studies.
স্থিতিস্থাপক (সূত্র
120179): অত্যন্ত কম , সর্বনিম্ন প্রজন দ্বিগুনের সময় ১৪ বৎসর (rm=0.026; K=0.25; tm=16; tmax=32; Fec=82-95).
মাছ ধরার ঝুঁকিপূর্ণতা (Ref.
59153): High vulnerability (57 of 100).
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জলবায়ু ঝুঁকিপূর্ণতা (Ref.
125649): High vulnerability (64 of 100).
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পৌষ্টিক উপাদান (Ref.
124155): Calcium = 13.3 [2.9, 63.2] mg/100g; Iron = 0.671 [0.165, 1.979] mg/100g; Protein = 20.1 [17.9, 22.2] %; Omega3 = 0.275 [0.123, 0.632] g/100g; Selenium = 43.1 [11.1, 117.0] μg/100g; VitaminA = 5.25 [1.65, 16.47] μg/100g; Zinc = 0.328 [0.161, 0.626] mg/100g (wet weight);
