. . . . "Synopsis on the biology of the Jack Mackerel (Trachurus symmetricus)"@en . . . . "Synopsis on the biology of the jack mackerel Trachurus symmetricus" . . . . . . . . . "Synopsis on the biology of the jack mackerel (Trachurus symmetricus)"@en . . . . . . . "Food and Agriculture Organization of the United Nations." . . "Mackerels." . .