Oman country information

Common names: Abul-garn, Jarjur
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Also Ref. 244.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/mu.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Randall, J.E., 1995
National Database:

Common names from other countries

Nga-man-kwe, Jarjur, Aqrun, ... more

Classification / Names Nomi Comuni | Sinonimi | Catalog of Fishes(Genere, Specie) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchi (squali e razze) (sharks and rays) > Carcharhiniformes (Ground sharks) > Sphyrnidae (Hammerhead, bonnethead, or scoophead sharks)
Etymology: Eusphyra: eu- (Gr.), good, well or very; sphyra (Gr.), hammer, referring to immense hammer-shaped head. (See ETYFish); blochii: In honor of physician-naturalist Marcus Elieser Bloch (1723-1799), who described and illustrated this shark in 1785, which he identified as Squalus zygaena. (See ETYFish).
More on author: Cuvier.

Issue
Eusphyra laticeps (Cantor, 1837) is a valid species after Fernando et al 2019 (Ref. 120444).

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

marino; salmastro benthopelagico; amfidromo (Ref. 51243). Tropical; 31°N - 20°S, 47°E - 154°E

Distribuzione Stati | Aree FAO | Ecosystems | Presenze | Point map | Introduzioni | Faunafri

Indo-West Pacific: Persian Gulf to the Philippines, north to China, south to Australia.

Length at first maturity / Size / Peso / Age

Maturity: L_m ?, range 120 - ? cm
Max length : 186 cm TL maschio/sesso non determinato; (Ref. 6871)

Short description Chiavi di identificazione | Morfologia | Morfometria

Spine dorsali (totale) : 0; Spine anali: 0. Grey or grey-brown above, paler below. Expanded lateral blades of head very narrow and wing-like, with a series of small bumps along edges in front of nostrils; width across head 40 or 50% of total length. Nostrils enormously expanded, each nearly 2 times the mouth head (Ref 13562).

Found in shallow water on continental and insular shelves (Ref. 244). Enters estuaries (Ref. 4832). Feeds mainly on small teleost fishes but also takes crustaceans and cephalopods (Ref. 13562). Viviparous (Ref. 50449), with 6 to 25 pups in a litter (Ref. 6871). Has a remarkable wing-shaped head which is nearly or quite half of its body length, the function of which is uncertain, maybe for maneuvering or for increasing the surface area of some of the sense organs (Ref. 244). Probably harmless to people (Ref. 13562). Caught commonly, but in low numbers, by inshore gillnet fisheries. Particularly common in catches off Kalimantan (Ref.58048). Probably a common fisheries species where it occurs (Ref. 13562). Meat utilized for human consumption; liver is a source of vitamin oil (Ref. 244). Offal probably utilized for fishmeal (Ref. 13562). Reported to reach 300 cm TL (Ref. 58784).

Life cycle and mating behavior Maturities | Riproduzione | Spawnings | Egg(s) | Fecundities | Larve

Viviparous, placental (Ref. 50449), with 6 to 25 in a litter after a gestation period of 8 (Ref.58048) -11 months (Ref. 6871). Size at birth between 32 and 45 cm TL (Ref. 13562).

Main reference Upload your references | Bibliografia | Coordinatore : Compagno, Leonard J.V. | Collaboratori

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)

Endangered (EN) (A2d+3d); Date assessed: 18 February 2015

CITES (Ref. 128078)

Appendix II: International trade monitored

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless (Ref. 13562)

Human uses

Pesca: commerciale

FAO(Publication : search) | FishSource |

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Estimates based on models

Preferred temperature (Ref. 115969): 25.2 - 29.1, mean 28.3 (based on 970 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 1.0010 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00513 (0.00275 - 0.00956), b=3.24 (3.07 - 3.41), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).

Trophic level (Ref. 69278): 4.2 ±0.6 se; based on diet studies.

Resilienza (Ref. 120179): Molto basso, tempo minimo di raddoppiamento della popolazione più di 14 anni (Fec=6).

Fishing Vulnerability (Ref. 59153): Very high vulnerability (90 of 100).

Price category (Ref. 80766): High.

Eusphyra blochii (Cuvier, 1816)