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Trachurus symmetricus (Ayres, 1855)

Pacific jack mackerel
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Image of Trachurus symmetricus (Pacific jack mackerel)
Trachurus symmetricus
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Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (Straalvinnigen) > Perciformes (Perch-likes) > Carangidae (Jacks and pompanos) > Caranginae
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).  More on author: Ayres.

Environment: milieu / climate zone / depth range / distribution range Ecologie

; marien; oceanodroom (Ref. 51243); diepteverspreiding 0 - 400 m.   Subtropical; 65°N - 13°N

Verspreiding Landen | FAO regio's | Ecosystems | Voorkomen | Point map | Introducties | Faunafri

Eastern Pacific: southeastern Alaska to southern Baja California, Mexico and the Gulf of California; reported from Acapulco in Mexico and the Galapagos Islands.

Size / Gewicht / Leeftijd

Maturity: Lm ?  range ? - 31 cm
Max length : 81.0 cm TL mannelijk/geslacht niet bekend; (Ref. 2850); common length : 55.0 cm TL mannelijk/geslacht niet bekend; (Ref. 9283); Maximaal vermelde leeftijd: 30 jaren (Ref. 766)

Korte beschrijving Morfologie | Morfometrie

Dorsale stekels (totaal): 8 - 9; Dorsale zachte stralen (totaal): 28-38; Anale stekels 1-2; Anale zachte stralen: 22 - 33; Wervels: 23 - 25. Small specimens may have an additional forward-directed spine at first dorsal origin (embedded in larger specimens).

Biologie     Verklarende woordenlijst (b.v. epibenthic)

Adults are often found offshore, up to 500 miles from the coast (Ref. 9283). They form large schools (Ref. 2850). Young frequently occur in school near kelp and under piers (Ref. 2850). They feed 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).

Life cycle and mating behavior Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven

Voornaamste referentie Upload your references | Referenties | Coördinator : Smith-Vaniz, William F. | Medewerkers

Eschmeyer, W.N., E.S. Herald and H. Hammann, 1983. A field guide to Pacific coast fishes of North America. Boston (MA, USA): Houghton Mifflin Company. xii+336 p. (Ref. 2850)

Status op de Rode Lijst van het IUCN (Ref. 120744)

  Niet bedreigd (LC) ; Date assessed: 30 April 2008

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





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Estimates of some properties based on models

Preferred temperature (Ref. 115969): 7 - 16.2, mean 9.2 (based on 50 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5001   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00977 (0.00603 - 0.01584), b=2.95 (2.81 - 3.09), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.6   ±0.2 se; Based on diet studies.
Weerstandsvermogen (Ref. 69278):  laag, minimale populatieverdubbelingstijd 4,5-14 jaar (K=0.09-0.21;tm=2-3; tmax=30; Fec<50,000).
Kwetsbaarheid (Ref. 59153):  Low to moderate vulnerability (30 of 100) .
Prijsklasse (Ref. 80766):   Low.