Abstract

In this work the food habits of Lutjanus synagris are described, by means of the analysis of stomach content, accounting the trophic spectrum for sex and size, ecological aspects, spatial distribution of the diet and their relationship with habitat conditions. The most representative preys (% N) were: Portunus spp. (27.33%; n = 44) and Squilla intermedia (10.56 %; n = 17). The gravimetric analysis (% P) shows that among the categories with more weight are: Gastropod (31.77%; 51.74 g) and Farfantepenaeus spp. (17.52%; 28.52 g). The occurrence frequency (% FO) shows that: Portunus spp. (25.37%; 17 stomachs) and S. intermedia (10.45 %; 7 stomachs) are the most frequent preys. According to the IRI (%), the most representative categories in the diet of L. synagris were: Portunus spp. and Gastropod (43.01 and 13.38%). four categories as main preys were identified in the diet of L. synagris: Portunidae (837.06), Gastropod (260.29), Squillidae (234.66) and Penaeidae (218.05), two as secondary preys: Sicyoniidae (126.35) and Trichiuridae (75.64) and the other ones as incidental preys. Spatial distribution of trophic niche breadth allow identify two zones: between Riohacha and Dibulla the higher values (0.64 to 1.00) were registered, with a minor degree of specialization diet and the minor sizes of L. synagris. Between Riohacha and Punta Gallinas the lower values (0.00 to 0.23) with a greater degree of specialization diet and the greater sizes of L. synagris.

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