Lack of consistency between the trophic interrelationships of five sparid species in two adjacent central Mediterranean coastal lagoons

Both interspecific and intraspecific inter-lagoon differences, between the central Mediterranean coastal lakes of Fogliano and Caprolace, in the trophic patterns of the examined species Diplodus annularis, Diplodus puntazzo, Diplodus sargus, Lithognathus mormyrus and Sparus aurata were revealed by means of correspondence analysis. The most evident inter-lagoon qualitative and quantitative diet changes were observed in S. aurata. Feeding similarities among species were synthesized for each lake by means of multidimensional scaling. Trophic interrelationships among sparid fish were different in the two lagoons, as a direct consequence of diet variations in each species. Such differences are interpreted as possibly reflecting differences in the overall structure of the benthic communities. Different feeding models could be identified, each corresponding to a peculiar adaptive strategy for the consumption of lagoon benthic resources. The use of benthophagous fish feeding habits as a tool for the monitoring of the structure and the dynamics of coastal lagoon communities is discussed.