South Africa country information

Common names: Southern bluefin tuna, Suidelike blouvin-tuna
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: minor commercial | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from catches made off the Cape region during the winter season. Also Ref. 168.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/sf.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Collette, B.B., 1986
National Database:

Common names from other countries

Thon rouge du sud, Atún rojo del Sur, Southern bluefin, ... 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: Castelnau.

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

marina; havsvandrande (Ref. 51243); djupintervall 0 - 2743 m (Ref. 57178). Temperate; 5°C - 20°C (Ref. 168); 10°S - 60°S, 180°W - 180°E (Ref. 54921)

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

Atlantic, Indian and Pacific: temperate and cold seas, mainly between 30°S and 50°S, to nearly 60°S. During spawning, large fish migrate to tropical seas, off the west coast of Australia, up to 10°S. Highly migratory species. If the current exploitation continues, the population will be below 500 mature individuals in 100 years (Ref. 27905).

Length at first maturity / Size / Vikt / Age

Maturity: L_m 122.0, range 120 - 130 cm
Max length : 245 cm FL hane/ej könsbestämd; (Ref. 5203); common length : 160 cm FL hane/ej könsbestämd; (Ref. 9684); publicerad maxvikt: 260.0 kg (Ref. 5203); rapporterad maxålder: 20 år (Ref. 168)

Short description Bestämningsnycklar | Morfologi | Morfometri

Ryggkotor: 39. A very large species, deepest near the middle of the first dorsal fin base. Swim bladder present. Lower sides and belly silvery white with colorless transverse lines alternating with rows of colorless dots. The first dorsal fin is yellow or bluish; the anal fin and finlets are dusky yellow edged with black; the median caudal keel is yellow in adults.

By maturity, most southern bluefin tuna lead an oceanic, pelagic existence (Ref. 6390). Spawning fish and larvae are encountered in waters with surface temperatures between 20° and 30°C. An opportunistic feeder, preying on a wide variety of fishes, crustaceans, cephalopods, salps, and other marine animals. Mostly canned (Ref. 9684). A specialized fishery for sashimi-quality has been developed recently by New Zealand fishers. In Japan, it is highly prized for the sashimi markets.

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

It is not known whether all mature fish spawn each year, every few years, or even only once in their lifetime (Ref. 30320).

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)

Endangered (EN) (A1bd); Date assessed: 15 January 2021

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fiskeri: kommersiell; Vattenbruk: kommersiell; sportfisk: ja

FAO(Aquaculture systems: produktion; 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

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Estimates based on models

Preferred temperature (Ref. 115969): 2.5 - 7.9, mean 5 (based on 439 cells).

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

Bayesian length-weight: a=0.01288 (0.01067 - 0.01556), b=3.03 (2.99 - 3.07), in cm Total Length, based on LWR estimates for this species (Ref. 93245).

Trofisk nivå (Ref. 69278): 3.9 ±0.53 se; based on food items.

Resiliens (Ref. 120179): Låg, lägsta populationsfördubblingstid 4,5-14 år (K=0.14-0.15; tm=8-9; tmax=20; Fec=14 million).

Prior r = 0.27, 95% CL = 0.18 - 0.41, Based on 1 full stock assessment.

Fishing Vulnerability (Ref. 59153): High to very high vulnerability (67 of 100).

Climate Vulnerability (Ref. 125649): Moderate vulnerability (38 of 100).

Price category (Ref. 80766): Very high.

Thunnus maccoyii (Castelnau, 1872)