Sri Lanka country information

Common names: Bala maora, Honda mora, Silky shark
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: commercial | Ref: FAO, 1992
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Annual shark production of the country is 8,000-9,000 (6% of total fish output), where over half of the catch is of silky shark, now targeted by oceanic tuna fisheries (because shark meat is more profitable than tuna) (IUCN Shark Specialist Group, Nov. 1998).
National Checklist:
Country Information: httpss://www.cia.gov/library/publications/resources/the-world-factbook/geos/ce.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Compagno, L.J.V., 1984
National Database:

Classification / Names

इलाज़मौबरांकी (शारक और रेज़) (sharks and rays) > Carcharhiniformes (Ground sharks) > Carcharhinidae (Requiem sharks)
आम नाम | उपशब्द | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Requin soyeux, Tiburón jaquetón, Blackspot shark, ... more

Main reference

Compagno, L.J.V. 1984. (Ref. 244)
संदर्भ | Biblio | संयोजक : Compagno, Leonard J.V. | सहयोगीयो

आकार / वज़न / Age

Max length : 350 cm TL पुल्लिंग / अलिंग; (Ref. 9997); common length : 250 cm TL पुल्लिंग / अलिंग; (Ref. 9997); अधिकतम प्रकाशित वज़न: 346.0 kg (Ref. 40637); अधिकतम सूचित उम्र: 25 वर्षो (Ref. 31395)

Length at first maturity
L_m 228.0, range 202 - 260 cm

पर्यावरण

; समुद्री प्रवाल-भित्ति संयुक्त; औशिनोड़िरोमस (Ref. 51243); गहराई सीमा 0 - 4000 m (Ref. 55180), usually 0 - 500 m (Ref. 6871)

जलवायु / सीमा

Subtropical; 23°C - 24°C (Ref. 244), preferred 27°C (Ref. 107945); 42°N - 43°S, 169°W - 180°E (Ref. 55180)

वितरण

Circumtropical. Western Atlantic: Massachusetts, USA to southern Brazil, including the Gulf of Mexico and the Caribbean Sea to Uruguay (Ref. 58839). Eastern Atlantic: Spain, Madeira to northern Angola; St. Paul's Rocks (Ref. 13121); Cape Verde (Ref. 34514). Indo-Pacific: scattered records from the Red Sea and Natal, South Africa (Ref. 5578) to China, New Zealand, and the Caroline, Hawaiian, Phoenix and Line islands. Eastern Pacific: southern Baja California, Mexico to northern Chile. Highly migratory species, Annex I of the 1982 Convention on the Law of the Sea (Ref. 26139).
देश | ऐफ ऐ ओ क्षेत्र | Ecosystems | संयोग | भूमिका

Short description

पृष्ठीय रीढ़ (सम्पूर्ण): 0; पृष्ठीय सौफट रेज़ (सम्पूर्ण): 0; गुदा कांटा 0; ऐनल सौफट रेज़: 0. A large, slim shark with a moderately long, flat and rounded snout, large eyes, small jaws, and oblique-cusped teeth with serrations; 2nd dorsal fin low and with greatly elongated rear tip (Ref. 5578). Grey or bluish-grey above, white below; no conspicuous fin markings (Ref. 5578). Only Carcharhinus species with an interdorsal ridge that has the dorsal fin origin behind the free rear tip of the pectoral fin (Ref. 26938).

Found abundantly near the edge of continental and insular shelves, but also in the open sea and occasionally inshore (Ref. 244). Often found in deepwater reefs and near insular slopes (Ref. 244). Littoral and epipelagic, in the open sea or near the bottom at 18-500 m (Ref. 58302). It is quick-moving and aggressive (Ref. 244). Solitary (Ref. 26340); often associated with schools of tuna (Ref. 244). Feeds mainly on fishes, but also squid, paper nautiluses, and pelagic crabs (Ref. 244; 37816). Viviparous (Ref. 50449). Regarded as dangerous to humans (Ref. 9997). Flesh utilized fresh and dried-salted for human consumption; its hide for leather; its fin for shark-fin soup; its liver for oil (Ref. 244). 2 to 14 young, 73 to 87 cm, are born per litter (Ref. 1602).

IUCN Red List Status (Ref. 115185)

Near Threatened (NT)

Threat to humans

Traumatogenic (Ref. 9997)

Human uses

मात्स्यिकी: उच्च वाणिज्य

अधिक जानकारी

देश
ऐफ ऐ ओ क्षेत्र
Ecosystems
संयोग
भूमिका
Stocks
पारिस्थितिकी
आहार
खाद्य पदार्थ
आहार खपत
खोराक

आम नाम
उपशब्द
चपायचय
परभक्षी
ईकोटोकसीकोलौजी
पुनरुत्पत्ति
परिपक्व अवधि
मछलीऔ का अंडे देना
Fecundity
अंडे
Egg development

Age/Size
बाढ़
Length-weight
Length-length
Length-frequencies
मौरफोमैटरिक्स
आकृति विज्ञान
लार्वा
लारवल गतिकी
भर्ती
बहुतायत

संदर्भ
जलीयकृषि
जलीयकृषि रूपरेखा
खींच
आनुवंशिकी
ऐल्लि आवृतियाँ
हैरेटिबिलटी
बीमारी
प्रक्रमण
Mass conversion

सहयोगीयो
तस्वीरे
Stamps, Coins
ध्वनि
सिगुयटिरा
रफ्तार
तैरने के प्रकार
गिल क्षेत्र
Otoliths
दिमाग
दृष्टि

साधन

Special reports

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Summary page | Point data | आम नाम | Photos

इंटरनेट स्रोत

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD₅₀ = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
4.5 ±0.0 se; Based on diet studies.

लौटाव (Ref. 69278)
बहुत नीचे, न्यूनतम जनसंख्या दुगनी समय अवलागत 14 महीने। (rm=0.054; K=0.05-0.15; tm=6-10; tmax=25; Fec=2-14)

Vulnerability (Ref. 59153)
Very high vulnerability (79 of 100)

Price category (Ref. 80766)
High

Carcharhinus falciformis (Müller & Henle, 1839)