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

Классификация / Names народные названия | синонимы | Catalog of Fishes(род, виды) | 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 экология

морской; мигрирует в океане (Ref. 51243); пределы глубины 0 - 200 m (Ref. 54439). Tropical; 18°C - 29°C (Ref. 168); 35°N - 38°S, 19°E - 137°W (Ref. 54439)

распространение страны | регионы FAO | Ecosystems | места находок | Point map | интродукции | 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 / Size / Вес / Возраст

Maturity: L_m 42.3, range 40 - 65 cm
Max length : 100.0 cm FL самец/пол неопределен; (Ref. 168); common length : 60.0 cm FL самец/пол неопределен; (Ref. 168); наибольший вес (опубликованные данные): 14.0 kg (Ref. 30874); наибольший возраст (опубликованны данные): 6 годы (Ref. 121508)

Краткое описание определительные ключи | морфология | морфометрия

колючие лучи спинного плавника (общее число) : 10 - 15; членистые (мягкие) лучи спинного плавника (общее число) : 11 - 15; колючие лучи анального плавника: 0; членистые (мягкие) лучи анального плавника: 11 - 15; позвонки: 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 | размножение | Spawnings | Egg(s) | Fecundities | личинки

Основная ссылка Upload your references | ссылки | координатор : Collette, Bruce B. | соавторы

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)

Статус Красного Списка МСОП (Ref. 130435)

Не вызывающий беспокойства (LC) ; Date assessed: 01 March 2022

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Угроза для людей

Reports of ciguatera poisoning (Ref. 30911)

Использование человеком

рыболовство: важный объект промысла; объект спортивного рыболовства: да

FAO(рыболовство: production, Видовой профиль; publication : search) | FIRMS (Stock assessments) | FishSource | Sea Around Us

дополнительная информация

Trophic ecology
пищевые объекты
Diet compositions
Food consumptions
Food rations
хищники

Ecology
экология
Home ranges

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

Life cycle
размножение
Maturities
Fecundities
Spawnings
Spawning aggregations
Egg(s)
Egg developments
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Distribution
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Ecosystems
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интродукции
BRUVS - Videos

Anatomy
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Otoliths

Physiology
Body compositions
Nutrients
Oxygen consumptions
Swimming type
Swimming speeds
Visual pigment(s)
звуки, издаваемые рыбами
Diseases / Parasites
Toxicities (LC50s)

Genetics
генетика
Electrophoreses
Heritabilities

Human related
Aquaculture systems
особенности рыбоводства
степень растяжения
Ciguatera cases
Stamps, coins, misc.

Outreach
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Taxonomy
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References
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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).

Trophic level (Ref. 69278): 4.5 ±0.0 se; based on diet studies.

устойчивость к внешним воздействиям (Ref. 120179): средний (среднего размера), минимальное время удвоения популяции 1.4-4.4 года (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).

Категория цены (Ref. 80766): Medium.

Euthynnus affinis (Cantor, 1849)