Trachurus murphyi Nichols, 1920
Chilean jack mackerel
photo by Béarez, P.

Family:  Carangidae (Jacks and pompanos), subfamily: Caranginae
Max. size:  70 cm TL (male/unsexed); max. reported age: 16 years
Environment:  pelagic-oceanic; depth range 10 - 306 m, oceanodromous
Distribution:  South Pacific and Southwestern Atlantic: Eastern Central and South Pacific: off Peru and Chile (Ref. 27363), incl. incidental in Juan Fernández Is. (Ref. 89357). Reported from off Ecuador (Ref. 9283). Southwest Pacific: off New Zealand (Ref. 5755). Southwestern Atlantic: off southern Argentina (Ref. 27363)
Diagnosis:  Dorsal spines (total): 9-9; Dorsal soft rays (total): 31-35; Anal spines: 3-3; Anal soft rays: 27-29. Body elongated and little compressed; teeth small and uniseriate; lower branch of first gill arch with 42 to 45 gill rakers; edge of shoulders girdle (cleithrum) with a small furrow at its upper end but lacking papillae; lateral line completely scaled, the scales becoming large scutes posteriorly; scutes in the area of the median curve 1.1 to 1.6 times the diameter of the eye; nape and back metallic blue or dark gray; flanks and belly pale; dorsal edge of operculum with a black stain (Ref. 55763). Body elongate and slightly compressed. Body dark blue dorsally, silvery-white ventrally. Black spot on upper posterior margin of opercle. Fins dusky (Ref. 37339). Pectoral fin falcate and very long (Ref. 27363).
Biology:  Adults are found in the shore and open oceanic waters, in schools. They feed mainly on fish larvae and small crustaceans. Marketed fresh (Ref. 9283). Utilized canned for human consumption and also made into fishmeal (Ref. 9988). The species is often found in Juan Fernández Is. as an incidental catch of Pseudocaranx chilensis (Guichenot, 1848) fisheries (Ref. 89357).
IUCN Red List Status: Data deficient (DD); Date assessed: 30 April 2008 Ref. (120744)
Threat to humans:  harmless
Country info:   
 

Entered by: Luna, Susan M. - 17.10.90
Modified by: Bailly, Nicolas - 12.07.13
Checked by: Garilao, Cristina V. - 22.06.95

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