Oman country information

Common names: Gubad, Jaydher
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: commercial | Ref: FAO, 1994
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Commercially exploited. Significant contributor in Omani fisheries. Total annual catch varies, ranging between 18000 to 20000 tons on average, with a peak of 31000 tons during the 1992/93 season. Caught using longlines, handlines and gillnets. Valued as food and game fish (Ref. 9773). Also Ref. 168.
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

Albacore, Rabil, Тунец желтоперый, ... more

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

> Scombriformes (Mackerels) > Scombridae (Mackerels, tunas, bonitos) > Scombrinae
Etymology: Thunnus: Greek, thynnos = tunna (Ref. 45335).
More on author: Bonnaterre.

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

marino; salmastro; oceanodromo (Ref. 51243); distribuzione batimetrica 1 - 1602 m, usually 1 - 250 m (Ref. 6390). Tropical; 15°C - 31°C (Ref. 168); 50°N - 50°S, 180°W - 180°E

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

Worldwide in tropical and subtropical seas, but absent from the Mediterranean Sea. Highly migratory species.

Length at first maturity / Size / Peso / Age

Maturity: L_m 103.3, range 78 - 158 cm
Max length : 239 cm FL maschio/sesso non determinato; (Ref. 40637); common length : 150 cm FL maschio/sesso non determinato; (Ref. 168); peso massimo pubblicato: 200.0 kg (Ref. 26550); Età massima riportata: 9 anni (Ref. 72462)

Short description Chiavi di identificazione | Morfologia | Morfometria

Spine dorsali (totale) : 11 - 14; Raggi dorsali molli (totale) : 12 - 16; Spine anali: 0; Raggi anali molli: 11 - 16; Vertebre: 39. This large species is distinguished by the following characters: elongate, fusiform body, slightly compressed laterally; total gill rakers on first gill arch 26-34; dorsal fins 2 and separated only by a narrow interspace, the second followed by 8-10 finlets; anal fin followed by 7 to 10 finlets; large specimens may have very long second dorsal and anal fins, becoming well over 20% of fork length; pectoral fins moderately long, usually reaching beyond second dorsal-fin origin but not beyond end of its base, usually 22-31% of FL; 2 flaps (interpelvic process) between pelvic fins; body with very small scales; corselet of larger scales developed but not very distinct; caudal peduncle very slender, bearing on each side a strong lateral keel between 2 smaller keels; no striations on ventral surface of liver; swimbladder present. Colour of back metallic dark blue changing through yellow to silver on belly; belly frequently crossed by about 20 broken, nearly vertical lines; dorsal and anal fins, and dorsal and anal finlets bright yellow, the finlets with a narrow black border (Ref. 9684).

An oceanic species occurring above and below the thermoclines. Pelagic in open water , but rarely seen near reefs (Ref. 48637). They school primarily by size, either in monospecific or multi-species groups. Larger fish frequently school with porpoises, also associated with floating debris and other objects. Feed on fishes, crustaceans and squids. It is sensitive to low concentrations of oxygen and therefore is not usually caught below 250 m in the tropics (Ref. 28952, 30329). Peak spawning occurs during the summer, in batches (Ref. 9684, 51846). Eggs and larvae are pelagic (Ref. 6769). Encircling nets are employed to catch schools near the surface (Ref. 9340). Caught mainly with longlines and purse seines. Marketed mainly fresh, frozen, canned (Ref. 9684), but also smoked (Ref. 9987). Highly valued for sashimi (Ref. 26938).

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

Spawn throughout the tropical and equatorial waters of the major oceans (Ref. 6390). At higher latitudes, spawning is seasonal, with peaks in summer; may continue throughout the year at lower latitudes (Ref. 6390). Yellowfin tuna are multiple spawners, ie they spawn every few days over the spawning period (Ref. 6390). Eggs and sperm are released into the water for fertilisation (Ref. 6390).

Main reference Upload your references | Bibliografia | Coordinatore : Collette, Bruce B. | Collaboratori

Collette, B.B. and C.E. Nauen, 1983. FAO Species Catalogue. Vol. 2. Scombrids of the world. An annotated and illustrated catalogue of tunas, mackerels, bonitos and related species known to date. Rome: FAO. FAO Fish. Synop. 125(2):137 p. (Ref. 168)

IUCN Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 15 January 2021

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Pesca: elevato interesse commerciale; Acquacoltura: sperimentale; Pesce da pesca sportiva: si

FAO(Aquaculture systems: production; pesca: production, species profile; publication : search) | FIRMS (Stock assessments) | FishSource | Sea Around Us

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Trophic ecology
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Estimates based on models

Preferred temperature (Ref. 115969): 16.5 - 28.9, mean 26.7 (based on 6382 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01479 (0.01210 - 0.01808), b=3.03 (2.99 - 3.07), in cm Total Length, based on LWR estimates for this species (Ref. 93245).

Trophic level (Ref. 69278): 4.4 ±0.4 se; based on diet studies.

Resilienza (Ref. 120179): Medio, tempo minimo di raddoppiamento della popolazione 1.4 - 4.4 anni (K=0.13-0.42; tm=2-5; tmax=8; Fec=200,000).

Prior r = 0.36, 95% CL = 0.24 - 0.54, Based on 9 full stock assessments.

Fishing Vulnerability (Ref. 59153): Moderate to high vulnerability (46 of 100).

Climate Vulnerability (Ref. 125649): Moderate vulnerability (42 of 100).

Price category (Ref. 80766): High.

Thunnus albacares (Bonnaterre, 1788)