Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Scombridae
(Mackerels, tunas, bonitos) > Scombrinae
Etymology: Auxis: Greek, auxis = a variety of tunna (Ref. 45335).
Issue on validity of subspecies: subspecies considered as valid in FB, elevated to species rank as Auxis brachydorax Collette & Aadland, 1996 in Eschmeyer (CofF ver. Mar. 2011: Ref. 86697). Please send references, or more studies are needed.
Environment / Climate / Range
Marine; pelagic-neritic. Tropical, preferred ?
Eastern Central Pacific.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 40.0 cm FL male/unsexed; (Ref. 32349); common length : 35.0 cm TL male/unsexed; (Ref. 55763)
Body elongate, robust, and rounded; dorsal fins widely separated; second dorsal fin followed by 8 finlets; pectoral fins long, reaching front of naked area above corselet; scales only on corselet section; each side of caudal peduncle bearing a strong keel between two smaller keels; back dark bluish purple; head almost black; 15 or more vertical bars on naked dorsal region (Ref. 55763).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Collette, B.B. and C.R. Aadland, 1996. Revision of the frigate tunas (Scombridae, Auxis), with descriptions of two new subspecies from the eastern Pacific. Fish. Bull. 94(3):423-441. (Ref. 32349)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00331 (0.00139 - 0.00788), b=3.15 (2.94 - 3.36), based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 4.2 ±0.5 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Assuming Fec>10,000).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (26 of 100) .