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Diet comparison of the bathyal shrimps, Aristeus antennatus (Risso, 1816) and Aristaeomorpha foliacea (Risso, 1827) (Decapoda, Aristeidae) in the eastern Mediterranean

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The diet composition of the bathyal aristeid shrimps, Aristeus antennatus and Aristaeomorpha foliacea was determined, based on an analysis of 192 and 200 specimens, respectively, collected in the Cretan sea (eastern Mediterranean).

Aristeus antennatus displayed a highly diversified diet, with Crustacea, Holothuroidea, Mollusca, and Pisces being the dominant prey categories. The low vacuity coefficient value and the high stomach fullness percentages indicated a high feeding activity for this species, which is an active predator but also an occasional scavenger. The diet variability of Aristaeomorpha foliacea is also high, with Crustacea and Pisces being the two most abundant and frequent prey categories. The feeding activity of A. foliacea, which is also an active predator and scavenger, seems to be higher than that of A. antennatus.

The diets of these two species significantly overlapped. This is due to the fact that they are both generalized feeders exploiting a wide variety of trophic resources. La composition du régime alimentaire des crevettes bathyales Aristeidae Aristeus antennatus et Aristaeomorpha foliacea a été déterminée en se basant sur l'analyse des observations de 192 et 200 spécimens respectivement, collectés dans la mer de Crète (Méditerranée orientale).

Aristeus antennatus présente un régime hautement diversifié, avec des crustacés, des holothuries, des mollusques et des poissons comme catégories de proies dominantes. La faible valeur du coefficient de vacuité et les forts pourcentages de remplissage de l'estomac indiquaient une haute activité de nutrition de cette espèce qui est un prédateur actif mais aussi un détritivore occasionnel. La variabilité du régime de Aristaeomorpha foliacea est également élevée, avec des crustacés et des poissons comme catégories de proies les plus abondantes et fréquentes. L'activité de nutrition de A. foliacea, qui est un prédateur actif et un détritivore, semble être plus forte que celle de A. antennatus.

Les régimes de ces deux espèces se chevauchent de manière significative. Ceci est dû au fait qu'ils sont tous deux des consommateurs généralistes, exploitant une large variété de ressources trophiques.


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