Carcharhinus porosus (Ranzani, 1839)

Smalltail shark
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Carcharhinus porosus
Picture by Carvalho Filho, A.

Classification / Names आम नाम | उपशब्द | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

इलाज़मौबरांकी (शारक और रेज़) (sharks and rays) > Carcharhiniformes (Ground sharks) > Carcharhinidae (Requiem sharks)
Etymology: Carcharhinus: Greek, karcharos = sharpen + Greek, rhinos = nose (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range पारिस्थितिकी

; समुद्री; खारा ड़िमरसल; गहराई सीमा ? - 36 m (Ref. 9253), usually 16 - 32 m (Ref. 96339).   Subtropical; 33°N - 36°S, 116°W - 33°W (Ref. 55189)

वितरण देश | ऐफ ऐ ओ क्षेत्र | Ecosystems | संयोग | Point map | भूमिका | Faunafri

Western Atlantic: upper Gulf of Mexico, to southern Brazil; recorded from Uruguay (Ref. 58839). Specimens of porosus from Borneo, Viet Nam and Thailand may represent an undescribed small species of Carcharhinus.

Length at first maturity / आकार / वज़न / Age

Maturity: Lm 70.0  range ? - 84 cm
Max length : 150 cm TL पुल्लिंग / अलिंग; (Ref. 244); common length : 90.0 cm TL पुल्लिंग / अलिंग; (Ref. 9253)

Short description आकृति विज्ञान | मौरफोमैटरिक्स

This species is a smooth-backed (lacking an interdorsal ridge) shark, with a low first dorsal fin originating over or behind the pectoral fin free rear tip. Adults' first dorsal fin anterior margin (from the origin of the fin to its apex) is as long as the distance from the apex to the free rear tip, so that apex makes an equilateral triangle with its origin and free rear tip; height of the first dorsal fin is about 8-9% of the total length. The second dorsal fin originates over the midpoint of the anal fin base. The caudal fin measures about one fourth of the total length. A series of conspicuous pores (hyomandibular pores) are located behind the eye. The upper teeth have long triangular cusps that become increasingly oblique towards the corners of the mouth, these have a weak notch or lack a notch on their medial edges, and a strong notch on the outer edges. Edges of the first four teeth have coarse serrations from the bases up to the notch and finer serrations from the notch to the tip and these coarse serrations disappear by the fifth or sixth tooth. Subsequent teeth have inner edges with uniform fine serrations from base to tip. The five or six outermost upper teeth have strongly oblique cusps with nearly straight inner margins and a strong notch on the outer margin while the lower teeth are erect and have cusps with a few coarse serrations at their bases and finer serrations towards the tips. Teeth number U:14-1-14; L:13-13. Dermal denticles are characteristic with a central strong ridge terminating in a long point, and two shorter ridges on wing-like sides; dorsal surface of the denticles has a coarse microsculpture. Body color gray above and dirty white below, unmarked fins (Ref. 86285).

जीवविज्ञान     शब्द संग्रह (उदाहरणार्थ epibenthic)

Found in the continental shelves, preferably over muddy bottoms, and especially in estuaries. Feeds mainly on small fishes including young hammerhead and sharpnose sharks, and shrimps. Viviparous, with 2 to 7 young in a litter. Size at birth between 31 and 40 cm. Utilized fresh for human consumption and processed for fishmeal, and liver extracted for oil.

Life cycle and mating behavior परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | Fecundity | लार्वा

Viviparous, placental (Ref. 50449). Distinct pairing with embrace (Ref. 205).

Main reference Upload your references | संदर्भ | संयोजक : Compagno, Leonard J.V. | सहयोगीयो

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. 120744)

  Data deficient (DD) ; Date assessed: 31 January 2006

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans


Human uses

मात्स्यिकी: लघु वाणिज्य
FAO(मात्स्यिकी: production; publication : search) | FIRMS (Stock assessments) | FishSource | Sea Around Us

अधिक जानकारी

आम नाम
परिपक्व अवधि
मछलीऔ का अंडे देना
Spawning aggregation
Egg development
आकृति विज्ञान
लारवल गतिकी
जलीयकृषि रूपरेखा
ऐल्लि आवृतियाँ
Mass conversion
Stamps, Coins Misc.
तैरने के प्रकार
गिल क्षेत्र


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इंटरनेट स्रोत

Estimates of some properties based on models

Preferred temperature (Ref. 115969): 22.5 - 27.9, mean 25.5 (based on 206 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00316 (0.00175 - 0.00571), b=3.10 (2.95 - 3.25), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  4.1   ±0.6 se; Based on diet studies.
लौटाव (Ref. 69278):  बहुत नीचे, न्यूनतम जनसंख्या दुगनी समय अवलागत 14 महीने। (K=0.08; tm=6; tmax=12; assuming Fec<10).
Vulnerability (Ref. 59153):  Very high vulnerability (77 of 100) .
Price category (Ref. 80766):   Medium.