Oman country information

Common names: Sahwa
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: commercial | Ref: FAO, 1994
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Constitutes a major portion of Omani fisheries. Average annual catch ranges from 6000 to 7000 tons annually, reaching a peak of 16000 tons in 1988. Edible. Caught using gillnets, and hook and line (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

Thon mignon, Atún tongol, Indian long-tailed tuna, ... more

Classification / Names Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa

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

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

marina; havsvandrande (Ref. 51243); djupintervall 10 - ? m. Tropical; 47°N - 31°S, 34°E - 154°E (Ref. 54923)

Utbredning Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri

Indo-West Pacific: Red Sea and East Africa to New Guinea, north to Japan, south to Australia. Reported in New Zealand (Ref. 89192).

Length at first maturity / Size / Vikt / Age

Maturity: L_m 60.7 range ? - ? cm
Max length : 145 cm FL hane/ej könsbestämd; (Ref. 40637); common length : 70.0 cm FL hane/ej könsbestämd; (Ref. 168); publicerad maxvikt: 35.9 kg (Ref. 168); rapporterad maxålder: 19 år (Ref. 97108)

Short description Bestämningsnycklar | Morfologi | Morfometri

Ryggkotor: 39. A small species, deepest near the middle of the first dorsal fin base. The second dorsal fin is higher than the first dorsal fin; the pectoral fins are short to moderately long; swim bladder is absent or rudimentary. Lower sides and belly silvery white with colorless elongate oval spots arranged in horizontally oriented rows. The dorsal, pectoral and pelvic fins are blackish; the tip of the second dorsal and anal fins are washed with yellow; the anal fin is silvery; the dorsal and anal finlets are yellow with grayish margins; the caudal fin is blackish, with streaks of yellow green.

Predominantly neritic species avoiding very turbid waters and areas with reduced salinity such as estuaries. May form schools of varying size. Feeds on a variety of fishes, cephalopods, and crustaceans, particularly stomatopod larvae and prawns (Ref. 9684). Marketed mainly fresh and dried salted (Ref. 9684), but also smoked, canned and frozen (Ref. 9987).

Life cycle and mating behavior Maturities | Reproduktion | Spawnings | Egg(s) | Fecundities | Larver

Main reference Upload your references | referenser | Koordinator : Collette, Bruce B. | Medarbetare

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)

Data deficient (DD) ; Date assessed: 01 July 2021

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fiskeri: kommersiellt viktig; sportfisk: ja

FAO(fiskeri: produktion, species profile; publication : search) | FIRMS (Stock assessments) | FishSource | Sea Around Us

Ytterligare information

Trophic ecology
Födoslag
Diet compositions
Food consumptions
Food rations
Predatorer

Ecology
Ekologi
Home ranges

Population dynamics
Growths
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversions
Recruitments
Abundances

Life cycle
Reproduktion
Maturities
Fecundities
Spawnings
Spawning aggregations
Egg(s)
Egg developments
Larver
Larvdynamik

Distribution
Länder
FAO områden
Ekosystem
Förekomster
Utplanteringar
BRUVS - Videos

Anatomy
Gill areas
Hjärnstorlek
Otoliths

Physiology
Body compositions
Nutrients
Oxygen consumptions
Swimming type
Swimming speeds
Visual pigment(s)
Fiskljud
Diseases / Parasites
Toxicities (LC50s)

Genetics
Genetik
Electrophoreses
Heritabilities

Human related
Aquaculture systems
Vattenbruksprofiler
Avelslinjer
Ciguatera cases
Stamps, coins, misc.

Outreach
Medarbetare

Taxonomy
Populärnamn
synonymer
Morfologi
Morfometri
Bilder

References
referenser

Verktyg

Special reports

Check for Aquarium maintenance | Check for Species Fact Sheets | Check for Aquaculture Fact Sheets

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Summary page | Point data | Populärnamn | Photos

Internet-källor

Estimates based on models

Preferred temperature (Ref. 115969): 13 - 28.4, mean 26.5 (based on 1398 cells).

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

Bayesian length-weight: a=0.01413 (0.00814 - 0.02450), b=3.00 (2.85 - 3.15), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).

Trofisk nivå (Ref. 69278): 4.5 ±0.6 se; based on diet studies.

Resiliens (Ref. 120179): Låg, lägsta populationsfördubblingstid 4,5-14 år (K=0.32; assuming tm=2-4; tmax=18.7; Fec>1M).

Prior r = 0.79, 95% CL = 0.52 - 1.18, Based on 2 full stock assessments.

Fishing Vulnerability (Ref. 59153): Moderate vulnerability (44 of 100).

Climate Vulnerability (Ref. 125649): High to very high vulnerability (75 of 100).

Price category (Ref. 80766): Very high.

Thunnus tonggol (Bleeker, 1851)