Classification / Names
Common names from other countries
Issue
Issue on validity of subspecies: subspecies considered as valid in FB, elevated to species rank as Auxis rochei (Risso, 1810) in Eschmeyer (CofF ver. Mar. 2011: Ref. 86697). Please send references, or more studies are needed.
Main reference
Size / Weight / Age
Max length : 50.0 cm FL male/unsexed; (Ref. 168)
Length at first maturity
Lm ?, range 35 - ? cm
Environment
Marine; brackish; pelagic-neritic; oceanodromous (Ref. 51243); depth range 10 - ? m (Ref. 9340)
Climate / Range
Tropical; ? - 28°C (Ref. 168), preferred 27°C (Ref. 107945); 61°N - 51°S, 180°W - 180°E
Distribution
Atlantic, Indian and Pacific (Western): including the Mediterranean Sea. The eastern Pacific population is recognized as subspecies Auxis rochei eudorax (Ref. 32349). 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): 9 - 12;
Dorsal
soft rays
(total): 10-13;
Anal
spines: 0;
Anal
soft rays: 12 - 14. Back bluish, turning to deep purple or almost black on head. Scaleless area with pattern of 15 or more fairly broad, nearly vertical dark bars. Belly white. Pectoral and pelvic fins purple, their inner sides black. Body robust, elongate and rounded. Teeth small and conical, in a single series. Pectoral fins short, not reaching vertical line from anterior margin of scaleless area above corselet. A large, single-pointed flap (interpelvic process) between pelvic fins. Body naked except for corselet, which is well developed in its posterior part 9 more than 6 scales wide under second dorsal-fin origin). A strong central keel on each side of caudal-fin base between 2 smaller keels (Ref 9684).
IUCN Red List Status (Ref. 115185)
Threat to humans
Harmless
Human uses
Fisheries: highly commercial; gamefish: yes
Tools
Special reports
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Internet sources
Estimates of some properties based on models
Phylogenetic diversity index
PD50 = 0.5625 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)
Trophic Level
4.3 ±0.67 se; Based on food items.
Resilience
Medium, minimum population doubling time 1.4 - 4.4 years (K=0.32; tm=2; Fec=31,000-103,000)
Vulnerability
Low to moderate vulnerability (27 of 100)
Price category