Euthynnus affinis, Kawakawa : fisheries, gamefish

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Euthynnus affinis (Cantor, 1849)

Kawakawa
個人による観察記録の追加 Fish Watcher
Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Euthynnus affinis   AquaMaps   Data sources: GBIF OBIS
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Euthynnus affinis
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分類 / Names 共通名の | 類義語 | Catalog of Fishes(部類, ) | 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 生態学

; 海洋回遊性 (Ref. 51243); 深さの範囲 0 - 200 m (Ref. 54439). Tropical; 18°C - 29°C (Ref. 168); 35°N - 38°S, 19°E - 137°W (Ref. 54439)

分布 国々 | 国連食糧農業機関の区域 | エコシステム | 事件 | Point map | 導入 | 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 / サイズ / 重さ / 年齢

Maturity: Lm 42.3, range 40 - 65 cm
Max length : 100.0 cm FL オス/雌雄の選別がない; (Ref. 168); common length : 60.0 cm FL オス/雌雄の選別がない; (Ref. 168); 最大公表体重: 14.0 kg (Ref. 30874); 最大記録サイズ: 6 年 (Ref. 121508)

簡単な記述 形態学 | 形態計測学

背面の脊椎 (合計): 10 - 15; 背鰭 (合計): 11-15; 肛門の骨 0; 臀鰭: 11 - 15; 脊つい: 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).

生物学     用語集 (例 epibenthic)

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 成熟 | 繁殖 | 放精 | | 生産力 | 幼生

主な参考文献 Upload your references | 参考文献 | コーディネーター : Collette, Bruce B. | 協力者

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のレッドリストの状況は (Ref. 130435)

  軽度懸念 (LC) ; Date assessed: 01 March 2022

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Reports of ciguatera poisoning (Ref. 30911)





Human uses

水産業: 高い商業の; ゲームフィッシュ: はい
FAO - 水産業: landings, 種の外形; Publication: search | FIRMS - Stock assessments | FishSource | 私達の周りの海

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繁殖
成熟
放精
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インターネットの情報源

Estimates based on models

Preferred temperature (Ref. 123201): 20.7 - 28.5, mean 26.9 °C (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).
栄養段階 (Ref. 69278):  4.5   ±0.0 se; based on diet studies.
Generation time: 1.9 (1.2 - 2.5) years. Estimated as median ln(3)/K based on 10 growth studies.
回復力 (Ref. 120179):  手段, 1.4年~4.4年の倍増期間の最小個体群 (K=0.4-0.5; tm=3; Fec=210,000).
Prior r = 0.57, 95% CL = 0.37 - 0.85, Based on 3 stock assessments.
Fishing Vulnerability (Ref. 59153):  Moderate vulnerability (36 of 100).
Climate Vulnerability (Ref. 125649):  High to very high vulnerability (75 of 100).
価格帯 (Ref. 80766):   Medium.
Nutrients (Ref. 124155):  Calcium = 20.9 [9.6, 171.3] mg/100g; Iron = 2.28 [0.88, 5.97] mg/100g; Protein = 23.1 [21.1, 24.7] %; Omega3 = 0.235 [0.129, 0.428] g/100g; Selenium = 70.6 [35.4, 143.5] μg/100g; VitaminA = 20.2 [5.4, 77.8] μg/100g; Zinc = 0.408 [0.211, 1.643] mg/100g (wet weight); based on nutrient studies.