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This paper gives a description of the diet of Atlantic horse, Trachurus trachurus (Linnaeus, 1758) (Carangiformes Carangidae) living in the bay of Béni-Saf (North-Western Algeria) between November 2015 and October 2016 by analyzing the contents of the stomachs of 488 specimens divided in three classes according to the length of their body. We used several indices such as the coefficient vacancy (V), the percentage of prey (Cn) and the frequency of occurrence of prey (Fc). Of the total stomachs examined, 135 are empty which corresponds to a vacancy coefficient of 27.66. In total, 3912 preys were counted. They belong to ten major taxonomic groups: Copepoda, Euphausiacea, Amphipoda, Mysidacea, Cumaceae Cephalopods, Echinodermata, Molluscs, phytoplankton and Teleosts). The study of diet of T. trachurus shows that it has a broad food spectrum, and is a carnivorous and voracious species (benthpelagic). We found that the first class prefers Crustaceans, the second favors Euphausiacea, and the third prefers the predation of Teleosts. The diet varies with the size of specimens which is proportional to the size of the prey.

biodiversity journal

Diet study of Atlantic horse mackerel (Trachurus trachurus Linnaeus,1758) (Carangiformes Carangidae) caught in Béni-Saf Bay, Western Mediterranean Sea (Algeria)