Euthynnus affinis (Cantor, 1849)

Kawakawa

Catalog of Fishes (gen., sp.) | ITIS | CoL

Classification	Actinopterygii \| Perciformes \| Scombridae \| Scombrinae
Synonyms	Thynnus affinis, Euthunnus affinis affinis, Euthunnus alleteratus affinis, ... more
Common names	... more

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AquaMaps Data sources: GBIF OBIS

Main reference

Collette, B.B. and C.E. Nauen. 1983. (Ref. 168)
Other references | Biblio | Coordinator : Collette, Bruce B. | Collaborators

Size / Weight / Age

Max length : 100.0 cm FL male/unsexed; (Ref. 168); common length : 60.0 cm FL male/unsexed; (Ref. 168); max. published weight: 14.0 kg (Ref. 30874)

Length at first maturity

L_m ?, range 40 - 65 cm

Environment

Pelagic-neritic; oceanodromous (Ref. 51243); marine; depth range 0 - 200 m (Ref. 54439)

Climate / Range

Tropical; 18°C - 29°C (Ref. 168); 35°N - 25°S, 40°E - 137°W (Ref. 54439)

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 species, Annex I of the 1982 Convention on the Law of the Sea (Ref. 26139).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 1114; Anal spines: 0; Anal soft rays: 13 - 14; Vertebrae: 39. Swim bladder absent. No trace of vertebral protuberances. Anterior spines of first dorsal fin much higher than those mid-way. Interpelvic process small and bifid. Body naked except for corselet and lateral line. Posterior portion of the back with a pattern of broken oblique stripes.

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 (Ref. 9684). Generally marketed canned and frozen; also utilized dried, salted, smoked (Ref. 9684) and fresh (Ref. 9987).


IUCN Red List Status (Ref. 57073)	Threat to humans
Not Evaluated	Reports of ciguatera poisoning (Ref. 30911)

Human uses
Fisheries: highly commercial; gamefish: yes


More information
Countries FAO areas Ecosystems Occurrences Introductions Ecology Diet Food items Food consumption Ration	Common names Synonyms Metabolism Predators Ecotoxicology Reproduction Maturity Spawning Eggs Egg development	Age/Size Growth Length-weight Length-length Length-frequencies Morphometrics Morphology Larvae Larval dynamics Recruitment	Other references Biblio Aquaculture Aquaculture profile Strains Genetics Allele frequencies Heritability Diseases Processing	Collaborators Pictures Stamps Sounds Ciguatera Speed Swim. type Gill area Otoliths Brains Vision

Tools
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Internet sources

Estimation of some characteristics with mathematical models

Phylogenetic diversity index (Ref. 82805)

PD₅₀ = 0.6250

Resilience (Ref. 69278)

High, minimum population doubling time less than 15 months (K=0.4-0.5; tm=3; Fec=210,000)


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
Moderate vulnerability (37 of 100)	Medium

Entered by Luna, Susan M.

Modified by Kesner-Reyes, Kathleen

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Page last modified by : celloran, 20 January 2010

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