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 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: Bleeker.

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

marino; oceanodromo (Ref. 51243); distribuzione batimetrica 10 - ? m. Tropical; 47°N - 31°S, 34°E - 154°E (Ref. 54923)

Distribuzione Stati | Aree FAO | Ecosystems | Presenze | Point map | Introduzioni | 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 / Peso / Age

Maturity: L_m 60.7 range ? - ? cm
Max length : 145 cm FL maschio/sesso non determinato; (Ref. 40637); common length : 70.0 cm FL maschio/sesso non determinato; (Ref. 168); peso massimo pubblicato: 35.9 kg (Ref. 168); Età massima riportata: 19 anni (Ref. 97108)

Short description Chiavi di identificazione | Morfologia | Morfometria

Vertebre: 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 | Riproduzione | Spawnings | Egg(s) | Fecundities | Larve

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)

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

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

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

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

Informazioni ulteriori

Trophic ecology
Prede
Diet compositions
Food consumptions
Food rations
Predatori

Ecology
Ecologia
Home ranges

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

Life cycle
Riproduzione
Maturities
Fecundities
Spawnings
Spawning aggregations
Egg(s)
Egg developments
Larve
Dinamica popolazioni larvali

Distribution
Stati
Aree FAO
Ecosystems
Presenze
Introduzioni
BRUVS - Videos

Anatomy
Gill areas
Cervelli
Otoliths

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

Genetics
Genetica
Electrophoreses
Heritabilities

Human related
Aquaculture systems
Profili di acquacoltura
Varietà
Ciguatera cases
Stamps, coins, misc.

Outreach
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Taxonomy
Nomi Comuni
Sinonimi
Morfologia
Morfometria
Immagini

References
Bibliografia

Strumenti

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

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Summary page | Point data | Nomi Comuni | Photos

Fonti Internet

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).

Trophic level (Ref. 69278): 4.5 ±0.6 se; based on diet studies.

Resilienza (Ref. 120179): Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (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)