South Africa country information

Common names: Eastern little tuna, Oostelike kleintuna
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: minor commercial | Ref: van der Elst, R.P. and F. Adkin (eds.), 1991
Aquaculture: | Ref:
Regulations: no regulations | Ref: van der Elst, R., 1993
Uses: gamefish: yes;
Comments: Ranges from Cape St. Francis eastward to the east coast (Ref. 5313). Status of stock sound; important game fish (Ref. 4332). Angling record: 11 kg; spearfishing record: 9 kg (Ref. 12484).
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. and C.E. Nauen, 1983
National Database:

Common names from other countries

Thonine orientale, Bacoreta oriental, Dwarf bonito, ... more

Classification / Names Noms communs | Synonymes | Catalog of Fishes(Genre, Espèce) | ITIS | CoL | WoRMS | Cloffa

> Scombriformes (Mackerels) > Scombridae (Mackerels, tunas, bonitos) > Scombrinae
Etymology: Euthynnus: Greek, eu = good + Greek, thynnos = tunna (Ref. 45335).

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

marin; océanodrome (Ref. 51243); profondeur 0 - 200 m (Ref. 54439). Tropical; 18°C - 29°C (Ref. 168); 35°N - 38°S, 19°E - 137°W (Ref. 54439)

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Point map | Introductions | Faunafri

Indo-West Pacific: in warm waters including oceanic islands and archipelagos. A few stray specimens have been collected in the Eastern Central Pacific. Highly migratory.

Length at first maturity / Taille / Poids / Âge

Maturity: L_m 42.3, range 40 - 65 cm
Max length : 100.0 cm FL mâle / non sexé; (Ref. 168); common length : 60.0 cm FL mâle / non sexé; (Ref. 168); poids max. publié: 14.0 kg (Ref. 30874); âge max. reporté: 6 années (Ref. 121508)

Description synthétique Clés d'identification | Morphologie | Morphométrie

Épines dorsales (Total) : 10 - 15; Rayons mous dorsaux (Total) : 11 - 15; Épines anales: 0; Rayons mous anaux: 11 - 15; Vertèbres: 39. This species is distinguished by the following characters: medium-sized fish with a robust, elongate and fusiform body; teeth small and conical, in a single series; total gill rakers on first gill arch 29-34; D1 XI-XIV with both dorsal fins separated by only a narrow interspace (not wider than eye), anterior spines of first fin much higher than those midway, giving fin a strongly concave outline; D2 much lower than first and followed by 8-10 finlets; anal fin followed by 6-8 finlets; pectoral fins short, never reaching interspace between dorsal fins; 2 flaps (interpelvic process) between pelvic fins; very slender caudal peduncle with a prominent lateral keel between 2 small keels at base of caudal fin; body naked except for corselet and lateral line. Colour of back dark blue with a complicated striped pattern which does not extend forward beyond middle of first dorsal fin; lower sides and belly silvery white; several characteristic dark spots between pelvic and pectoral fins (but may not always be present) (Ref. 9684, 90102).

Occurs in open waters but always remains close to the shoreline. The young may enter bays and harbors. Forms multi-species schools by size with other scombrid species comprising from 100 to over 5,000 individuals. A highly opportunistic predator feeding indiscriminately on small fishes, especially on clupeoids and atherinids; also on squids, crustaceans and zooplankton. Caught in multispecies fisheries, mainly by surface trolling; also with gill nets. Generally marketed canned and frozen; also utilized dried, salted, smoked and fresh (Ref. 9684).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larves

Référence principale Upload your references | Références | Coordinateur : Collette, Bruce B. | Collaborateurs

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)

Statut dans la liste rouge de l'IUCN (Ref. 130435)

Préoccupation mineure (LC) ; Date assessed: 01 March 2022

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

Reports of ciguatera poisoning (Ref. 30911)

Utilisations par l'homme

Pêcheries: hautement commercial; pêche sportive: oui

FAO(pêcheries: production, Résumé espèce; publication : search) | FIRMS (Stock assessments) | FishSource | Sea Around Us

Plus d'informations

Trophic ecology
Éléments du régime alimentaire
Diet compositions
Food consumptions
Food rations
Prédateurs

Ecology
Écologie
Home ranges

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

Life cycle
Reproduction
Maturities
Fecundities
Spawnings
Spawning aggregations
Egg(s)
Egg developments
Larves
Dynamique des populations larvaires

Distribution
Pays
Zones FAO
Écosystèmes
Occurrences
Introductions
BRUVS - Videos

Anatomy
Gill areas
Cerveaux
Otolithes

Physiology
Body compositions
Nutrients
Oxygen consumptions
Type de nage
Swimming speeds
Visual pigment(s)
Sons de poissons
Diseases / Parasites
Toxicities (LC50s)

Genetics
Génétique
Electrophoreses
Heritabilities

Human related
Aquaculture systems
Profils d'aquaculture
Souches
Ciguatera cases
Stamps, coins, misc.

Outreach
Collaborateurs

Taxonomy
Noms communs
Synonymes
Morphologie
Morphométrie
Images

References
Références

Outils

Articles particuliers

Maintenance en aquarium | Articles sur l'espèce | Rapports d'aquaculture

Télécharger en XML

Page de résumé | Coordonnées géographiques | Noms communs | Photos

Sources Internet

Estimates based on models

Preferred temperature (Ref. 115969): 20.7 - 28.5, mean 26.9 (based on 1384 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01000 (0.00862 - 0.01160), b=3.05 (3.01 - 3.09), in cm Total Length, based on LWR estimates for this species (Ref. 93245).

Niveau trophique (Ref. 69278): 4.5 ±0.0 se; based on diet studies.

Résilience (Ref. 120179): Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (K=0.4-0.5; tm=3; Fec=210,000).

Prior r = 0.88, 95% CL = 0.58 - 1.32, Based on 5 full stock assessments.

Fishing Vulnerability (Ref. 59153): Moderate vulnerability (36 of 100).

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

Catégorie de prix (Ref. 80766): Medium.

Euthynnus affinis (Cantor, 1849)