Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Carangidae
(Jacks and pompanos)
Etymology: Trachurus: Greek, trachys, -eia, -ys = rough + Greek, oura = tail (Ref. 45335); symmetricus: From symmetricus which means regularly formed - referring to the rough tail (Ref. 6885).
Environment / Climate / Range
Marine; pelagic-oceanic; oceanodromous (Ref. 51243); depth range 0 - 400 m. Subtropical; 65°N - 13°N
Size / Weight / Age
Maturity: Lm ?  range ? - 31 cm
Max length : 81.0 cm TL male/unsexed; (Ref. 2850); common length : 55.0 cm TL male/unsexed; (Ref. 9283); max. reported age: 30 years (Ref. 766)
Eastern Pacific: southeastern Alaska to southern Baja California, Mexico and the Gulf of California; reported from Acapulco in Mexico and the Galapagos Islands.
Often found offshore, up to 500 miles from the coast (Ref. 9283). Forms large schools (Ref. 2850). Young frequently occur in school near kelp and under piers (Ref. 2850). Feeds mainly on small crustaceans and fish larvae (Ref. 9283). Large individuals often move inshore and north in the summer (Ref. 2850). Marketed fresh, smoked, canned and frozen; eaten fried, broiled and baked (Ref. 9988).
Eschmeyer, W.N., E.S. Herald and H. Hammann, 1983. A field guide to Pacific coast fishes of North America. Houghton Mifflin Company, Boston, U.S.A. 336 p.
IUCN Red List Status (Ref. 90363)
Threat to humans
Fisheries: commercial; gamefish: yes
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on empirical models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01031 (-0.10149 - 0.12212), b=2.94 (2.87 - 3.01), based on LWR estimates for species & genus-BS (Ref. 93245
Trophic Level (Ref. 69278
): 3.6 ±0.5 se; Based on diet studies.
Resilience (Ref. 69278
): Low, minimum population doubling time 4.5 - 14 years (K=0.09-0.21;tm=2-3; tmax=30; Fec<50,000).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (30 of 100) .