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Trachurus symmetricus (Ayres, 1855)
PACIFIC JACK MACKEREL
Pacific jackmackerel

Life   Vertebrata   Fish   Carangidae   Trachurus

Trachurus symmetricus
© Copyright Photographer/SFTEP, 2002 · 0
Trachurus symmetricus

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Trachurus symmetricus
www.fao.org Copyright Michel Lamboeuf · 0
Trachurus symmetricus
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Overview
Main identification features
  • large spiny scales all lateral line
  • curved part ll: spine height less than 44 percent eye
Dorsal rays VIII + I, 31-33, without finlet behind; anal rays II+I, 26-30; gill rakers on first arch (excluding rudiments) 14-18 + 38-43; lateral line moderately arched anteriorly; scales in curved part as well as straight part of lateral line enlarged large and scute-like, those on curved part of lateral line smaller in this species than in T. murphyi (height= 25-44% vs 61-85% of eye diameter, respectively); body long and slender, slightly compressed; pectorals long, reach origin of anal fin.

Metallic blue to olive green on back, lower two-thirds paler, usually whitish to silvery; no distinctive markings except black spot on upper edge of gill opening.

Size: reaches about 81 cm, common to 55 cm.

Habitat: a coastal pelagic species.

Depth: 0-400 m.

Alaska to the tip of Baja.

T. murphyi which occurs in the southern part of our region is the sister species of T. symmetricus.


Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: North Temperate (Californian Province &/or Northern Gulf of California); Northern Subtropical (Cortez Province + Sinaloan Gap); Northern Tropical (Mexican Province to Nicaragua + Revillagigedos).
Depth Range Max: 400 m.
Depth Range Min: 0 m.
Diet: Pelagic crustacea; bony fishes; zooplankton; pelagic fish larvae; pelagic fish eggs.
Eastern Pacific Range: Northern limit=55; Southern limit=24; Western limit=-150; Eastern limit=-110; Latitudinal range=31; Longitudinal range=40.
Egg Type: Pelagic; Pelagic larva.
Feeding Group: Carnivore; Planktivore.
FishBase Habitat: Pelagic.
Global Endemism: TEP non-endemic; East Pacific endemic; All species.
Habitat: Water column.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 81 cm.
Regional Endemism: Continent; Temperate Eastern Pacific, primarily; California province, primarily; Continent only; Tropical Eastern Pacific (TEP) non-endemic; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Mid Water; Near Surface; Water column only;


Names
Scientific source:

Links to other sites

References
  • Ayres, W. O., 1855., Description of new species of Californian fishes. A number of short notices read before the Society at several meetings in 1855., Proceedings of the California Academy of Sciences (Series 1), 1:23-77.
  • Cárdenas, L., Hernández, CE., Poulin, E., Magoulas, A., Kornfield, I., Ojeda, F.P., 2005., Origin, diversification, and historical biogeography of the genus \., .
  • Eschmeyer , W. N. , Herald , E. S. and Hamman, H., 1983., A field guide to Pacific coast fishes of North America from the Gulf of Alaska to Baja California. Peterson Field Guide Ser. 28., Houghton Mifflin:336pp.
  • Findley, L.T., Hendrickx, M.E., Brusca, R.C., van der Heiden, A.M., Hastings, P.A., Torre, J., 2003., Diversidad de la Macrofauna Marina del Golfo de California, Mexico., CD-ROM versión 1.0. Projecto de la Macrofauna del Golfo .  Derechos reservados de los autores y Conservación Internacional.
  • Fischer , W. , Krup , F. , Schneider , W. , Sommer , C. , Carpenter , K. E. and Niem, V. H., 1995., Guia FAO para la Identificacion de Especies de para los fines de la Pesca. Pacifico Centro-Oriental. Volumen II. Vertebrados - Parte 1., FAO2:647-1200.
  • Galván-Magaña, F., Abitia-Cárdenas, L.A., Rodríguez-Romero, J., Pérez-España, H., Chávez-Ramos, H., 1996., Systematics list of the fishes from Cerralvo island, Baja California Sur, Mexico., Ciencias Marinas, 22:295-311.
  • Galván-Magaña, F., Gutiérrez-Sánchez, F., Abitia-Cárdenas, L.A., Rodríguez-Romero, J., 2000., The distribution and affinities of the shore fishes of the Baja California Sur lagoons. In Aquatic Ecosystems of Mexico: Status and Scope. Eds. M. Manuwar, S.G. Lawrence, I.F. Manuwar & D.F. Malley. Ecovision World Monograph Series., Backhuys Publishers:383-398.
  • Gotshall, D.W., 1996., Fishes of Rocas Alijos. In Rocas Alijos. Ed. R. W. Schmieder. Cornell Expeditions., Kluwer Academic Publishers: 347-354.
  • Jimenez-Prado, P., Béarez, P., 2004., Peces marinos del Ecuador continental / Marine fishes of continental Ecuador., SIMBIOE/NAZCA/IFEA tomo 1 y 2.
  • Lea, R.N. and Walker Jr., H.J., 1995., Record of the bigeye trevally, Caranx sexfasciatus, and Mexican lookdown, Selene brevoorti, with notes on other carangids from California., Calif. Fish & Game, 81:89-95.
  • Love, M.S., Mecklenburg, C.W., Mecklenburg, T.A., Thorsteinson, L.K., 2005., es of the West Coast and Alaska: a checklist of North Pacific and Artic Ocena species from Baja California to the Alaska-Yukon border., U.S. Department of the Interior, U.S. Geological Survey, Biological Resources Division, 288pp.
  • Osburn , R. C. and Nichols, J. T., 1916., Shore Fishes Collected by the 'Albatross' Expedition in Lower California with Descriptions of New Species., Bull. Amer. Mus. Nat. Hist., 35:139-181.
  • Pondella II, D.J., Gintert, B.E., Cobb, J.R., Allen, L.G., 2005., Biogeography of the nearshore rocky-reef fishes at the southern and Baja California islands., Journal of Biogeography, 32:187-201.
  • Snodgrass , R. E. and Heller, E., 1905., Papers from the Hopkins Stanford Galapagos expedition, 1898-1899. XVII. Shorefishes of the Revillagigedo, Clipperton, Cocos and Galapagos Island., Proc. Wash. Acad. Sci., 6:333-427.
  • Stepien , C.A. and Rosenblatt, R.H., 1996., Genetic divergence in antitropical pelagic marine fishes (Trachurus, Merluccius, and Scomber) between North and South America., Copeia, 1996:586-598.
  • Van der Heiden , A. M. and Findley, L. T., 1988., Lista de los peces marinos del sur de Sinaloa, México., Anales del Centro de Ciencias del Mar y Limnologia de la Universidad Autonoma Nacional de Mexico, 15:209-224.
  • Walker, B. W. and Baldwin, W. J., 1964., Provisional check list of fishes of the Revillagigedo islands., 18 pp.

Acknowledgements

I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.


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